./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s4if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 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-fpi/s4if.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 5fe0a71bff946f0cc68d0dab1416e0ef991c6bf06ad7cbb70643ca18073a3c7e --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 19:11:56,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 19:11:56,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 19:11:56,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 19:11:56,722 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 19:11:56,724 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 19:11:56,725 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 19:11:56,727 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 19:11:56,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 19:11:56,732 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 19:11:56,733 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 19:11:56,734 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 19:11:56,734 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 19:11:56,736 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 19:11:56,737 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 19:11:56,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 19:11:56,738 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 19:11:56,739 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 19:11:56,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 19:11:56,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 19:11:56,744 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 19:11:56,745 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 19:11:56,746 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 19:11:56,747 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 19:11:56,752 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 19:11:56,752 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 19:11:56,753 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 19:11:56,754 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 19:11:56,754 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 19:11:56,754 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 19:11:56,755 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 19:11:56,755 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 19:11:56,756 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 19:11:56,757 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 19:11:56,758 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 19:11:56,758 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 19:11:56,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 19:11:56,759 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 19:11:56,759 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 19:11:56,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 19:11:56,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 19:11:56,761 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 19:11:56,783 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 19:11:56,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 19:11:56,783 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 19:11:56,784 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 19:11:56,784 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 19:11:56,784 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 19:11:56,785 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 19:11:56,785 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 19:11:56,785 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 19:11:56,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 19:11:56,786 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 19:11:56,786 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 19:11:56,786 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 19:11:56,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 19:11:56,786 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 19:11:56,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 19:11:56,787 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 19:11:56,787 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 19:11:56,787 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 19:11:56,787 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 19:11:56,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 19:11:56,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 19:11:56,788 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 19:11:56,788 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 19:11:56,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 19:11:56,788 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 19:11:56,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 19:11:56,788 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 19:11:56,789 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 19:11:56,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 19:11:56,789 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 19:11:56,789 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 19:11:56,789 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 19:11:56,789 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 19:11:56,789 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 19:11:56,790 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fe0a71bff946f0cc68d0dab1416e0ef991c6bf06ad7cbb70643ca18073a3c7e [2023-02-15 19:11:56,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 19:11:56,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 19:11:57,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 19:11:57,002 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 19:11:57,002 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 19:11:57,003 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s4if.c [2023-02-15 19:11:57,915 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 19:11:58,049 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 19:11:58,049 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s4if.c [2023-02-15 19:11:58,053 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e908b702/c4c8b8eeb20e4504b23ab545761723a0/FLAG3d4cde27a [2023-02-15 19:11:58,476 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e908b702/c4c8b8eeb20e4504b23ab545761723a0 [2023-02-15 19:11:58,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 19:11:58,479 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 19:11:58,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 19:11:58,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 19:11:58,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 19:11:58,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 07:11:58" (1/1) ... [2023-02-15 19:11:58,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f08dcb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:11:58, skipping insertion in model container [2023-02-15 19:11:58,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 07:11:58" (1/1) ... [2023-02-15 19:11:58,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 19:11:58,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 19:11:58,591 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-fpi/s4if.c[587,600] [2023-02-15 19:11:58,608 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 19:11:58,617 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 19:11:58,629 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-fpi/s4if.c[587,600] [2023-02-15 19:11:58,641 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 19:11:58,650 INFO L208 MainTranslator]: Completed translation [2023-02-15 19:11:58,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:11:58 WrapperNode [2023-02-15 19:11:58,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 19:11:58,652 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 19:11:58,652 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 19:11:58,652 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 19:11:58,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:11:58" (1/1) ... [2023-02-15 19:11:58,667 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:11:58" (1/1) ... [2023-02-15 19:11:58,684 INFO L138 Inliner]: procedures = 17, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2023-02-15 19:11:58,685 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 19:11:58,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 19:11:58,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 19:11:58,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 19:11:58,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:11:58" (1/1) ... [2023-02-15 19:11:58,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:11:58" (1/1) ... [2023-02-15 19:11:58,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:11:58" (1/1) ... [2023-02-15 19:11:58,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:11:58" (1/1) ... [2023-02-15 19:11:58,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:11:58" (1/1) ... [2023-02-15 19:11:58,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:11:58" (1/1) ... [2023-02-15 19:11:58,713 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:11:58" (1/1) ... [2023-02-15 19:11:58,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:11:58" (1/1) ... [2023-02-15 19:11:58,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 19:11:58,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 19:11:58,719 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 19:11:58,719 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 19:11:58,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:11:58" (1/1) ... [2023-02-15 19:11:58,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 19:11:58,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:11:58,749 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 19:11:58,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 19:11:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 19:11:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 19:11:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 19:11:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 19:11:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 19:11:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 19:11:58,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 19:11:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 19:11:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 19:11:58,833 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 19:11:58,834 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 19:11:58,970 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 19:11:58,974 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 19:11:58,974 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 19:11:58,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 07:11:58 BoogieIcfgContainer [2023-02-15 19:11:58,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 19:11:58,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 19:11:58,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 19:11:58,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 19:11:58,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 07:11:58" (1/3) ... [2023-02-15 19:11:58,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17184aba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 07:11:58, skipping insertion in model container [2023-02-15 19:11:58,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:11:58" (2/3) ... [2023-02-15 19:11:58,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17184aba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 07:11:58, skipping insertion in model container [2023-02-15 19:11:58,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 07:11:58" (3/3) ... [2023-02-15 19:11:58,995 INFO L112 eAbstractionObserver]: Analyzing ICFG s4if.c [2023-02-15 19:11:59,006 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 19:11:59,006 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 19:11:59,038 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 19:11:59,044 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;@7f290f90, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 19:11:59,044 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 19:11:59,047 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:11:59,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 19:11:59,050 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:11:59,051 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:11:59,051 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:11:59,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:11:59,054 INFO L85 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2023-02-15 19:11:59,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:11:59,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004624118] [2023-02-15 19:11:59,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:11:59,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:11:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:11:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:11:59,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:11:59,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004624118] [2023-02-15 19:11:59,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004624118] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:11:59,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:11:59,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 19:11:59,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540032310] [2023-02-15 19:11:59,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:11:59,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 19:11:59,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:11:59,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 19:11:59,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 19:11:59,230 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 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 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:11:59,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:11:59,241 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2023-02-15 19:11:59,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 19:11:59,242 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-15 19:11:59,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:11:59,246 INFO L225 Difference]: With dead ends: 34 [2023-02-15 19:11:59,246 INFO L226 Difference]: Without dead ends: 15 [2023-02-15 19:11:59,248 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 [2023-02-15 19:11:59,250 INFO L413 NwaCegarLoop]: 22 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, 22 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 [2023-02-15 19:11:59,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:11:59,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-15 19:11:59,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-02-15 19:11:59,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:11:59,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-02-15 19:11:59,268 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2023-02-15 19:11:59,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:11:59,268 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-02-15 19:11:59,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:11:59,269 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-02-15 19:11:59,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 19:11:59,269 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:11:59,269 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:11:59,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 19:11:59,269 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:11:59,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:11:59,270 INFO L85 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2023-02-15 19:11:59,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:11:59,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581447012] [2023-02-15 19:11:59,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:11:59,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:11:59,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:11:59,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:11:59,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:11:59,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581447012] [2023-02-15 19:11:59,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581447012] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:11:59,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:11:59,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 19:11:59,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521323077] [2023-02-15 19:11:59,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:11:59,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 19:11:59,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:11:59,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 19:11:59,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 19:11:59,431 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:11:59,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:11:59,466 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2023-02-15 19:11:59,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 19:11:59,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-15 19:11:59,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:11:59,467 INFO L225 Difference]: With dead ends: 28 [2023-02-15 19:11:59,467 INFO L226 Difference]: Without dead ends: 20 [2023-02-15 19:11:59,468 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 [2023-02-15 19:11:59,469 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:11:59,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 10 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:11:59,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-15 19:11:59,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2023-02-15 19:11:59,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:11:59,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-02-15 19:11:59,472 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2023-02-15 19:11:59,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:11:59,472 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-02-15 19:11:59,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:11:59,473 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-02-15 19:11:59,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 19:11:59,473 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:11:59,473 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:11:59,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 19:11:59,474 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:11:59,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:11:59,474 INFO L85 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2023-02-15 19:11:59,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:11:59,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069591232] [2023-02-15 19:11:59,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:11:59,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:11:59,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:12:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:12:00,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:12:00,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069591232] [2023-02-15 19:12:00,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069591232] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:12:00,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108244908] [2023-02-15 19:12:00,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:12:00,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:12:00,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:12:00,037 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:12:00,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 19:12:00,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:12:00,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-15 19:12:00,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:12:00,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2023-02-15 19:12:00,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 19:12:00,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 19:12:00,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2023-02-15 19:12:00,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 23 [2023-02-15 19:12:00,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:12:00,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:12:00,599 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:12:00,600 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2023-02-15 19:12:00,603 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 19:12:00,604 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 26 treesize of output 18 [2023-02-15 19:12:00,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 10 [2023-02-15 19:12:00,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:12:00,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108244908] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:12:00,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:12:00,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 24 [2023-02-15 19:12:00,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414185877] [2023-02-15 19:12:00,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:12:00,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 19:12:00,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:12:00,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 19:12:00,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2023-02-15 19:12:00,639 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 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) [2023-02-15 19:12:01,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:12:01,118 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2023-02-15 19:12:01,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 19:12:01,119 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 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) Word has length 16 [2023-02-15 19:12:01,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:12:01,120 INFO L225 Difference]: With dead ends: 37 [2023-02-15 19:12:01,120 INFO L226 Difference]: Without dead ends: 33 [2023-02-15 19:12:01,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=253, Invalid=869, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 19:12:01,122 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 89 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:12:01,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 28 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 19:12:01,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-15 19:12:01,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2023-02-15 19:12:01,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:12:01,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2023-02-15 19:12:01,136 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 16 [2023-02-15 19:12:01,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:12:01,137 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2023-02-15 19:12:01,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 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) [2023-02-15 19:12:01,137 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2023-02-15 19:12:01,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 19:12:01,138 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:12:01,139 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:12:01,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 19:12:01,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:12:01,345 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:12:01,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:12:01,346 INFO L85 PathProgramCache]: Analyzing trace with hash 680869797, now seen corresponding path program 1 times [2023-02-15 19:12:01,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:12:01,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858888452] [2023-02-15 19:12:01,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:12:01,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:12:01,355 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 19:12:01,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [290262211] [2023-02-15 19:12:01,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:12:01,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:12:01,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:12:01,357 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:12:01,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 19:12:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:12:01,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 19:12:01,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:12:01,408 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 11 treesize of output 7 [2023-02-15 19:12:01,429 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 15 treesize of output 7 [2023-02-15 19:12:01,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:12:01,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:12:01,468 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 14 treesize of output 12 [2023-02-15 19:12:01,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 16 [2023-02-15 19:12:01,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:12:01,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:12:01,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858888452] [2023-02-15 19:12:01,479 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 19:12:01,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290262211] [2023-02-15 19:12:01,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290262211] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:12:01,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 19:12:01,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-02-15 19:12:01,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078302846] [2023-02-15 19:12:01,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 19:12:01,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 19:12:01,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:12:01,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 19:12:01,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-02-15 19:12:01,482 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:12:01,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:12:01,542 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2023-02-15 19:12:01,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 19:12:01,543 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 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 16 [2023-02-15 19:12:01,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:12:01,544 INFO L225 Difference]: With dead ends: 38 [2023-02-15 19:12:01,544 INFO L226 Difference]: Without dead ends: 26 [2023-02-15 19:12:01,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-02-15 19:12:01,548 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:12:01,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 42 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:12:01,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-15 19:12:01,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2023-02-15 19:12:01,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:12:01,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-02-15 19:12:01,557 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2023-02-15 19:12:01,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:12:01,558 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-02-15 19:12:01,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:12:01,558 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-02-15 19:12:01,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-15 19:12:01,559 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:12:01,559 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:12:01,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 19:12:01,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-02-15 19:12:01,766 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:12:01,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:12:01,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1137819675, now seen corresponding path program 2 times [2023-02-15 19:12:01,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:12:01,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85395851] [2023-02-15 19:12:01,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:12:01,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:12:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:12:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:12:01,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:12:01,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85395851] [2023-02-15 19:12:01,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85395851] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:12:01,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867416993] [2023-02-15 19:12:01,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 19:12:01,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:12:01,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:12:01,832 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:12:01,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 19:12:01,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 19:12:01,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:12:01,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 19:12:01,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:12:01,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:12:01,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:12:01,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:12:01,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867416993] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:12:01,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:12:01,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-15 19:12:01,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613052821] [2023-02-15 19:12:01,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:12:01,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 19:12:01,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:12:01,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 19:12:01,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-15 19:12:01,939 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:12:02,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:12:02,029 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2023-02-15 19:12:02,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 19:12:02,030 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-15 19:12:02,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:12:02,030 INFO L225 Difference]: With dead ends: 33 [2023-02-15 19:12:02,030 INFO L226 Difference]: Without dead ends: 29 [2023-02-15 19:12:02,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-02-15 19:12:02,031 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:12:02,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 32 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 19:12:02,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-15 19:12:02,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2023-02-15 19:12:02,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:12:02,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-02-15 19:12:02,035 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 18 [2023-02-15 19:12:02,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:12:02,035 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-02-15 19:12:02,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:12:02,035 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-02-15 19:12:02,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 19:12:02,036 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:12:02,036 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:12:02,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 19:12:02,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:12:02,241 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:12:02,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:12:02,241 INFO L85 PathProgramCache]: Analyzing trace with hash -479454913, now seen corresponding path program 3 times [2023-02-15 19:12:02,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:12:02,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169662631] [2023-02-15 19:12:02,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:12:02,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:12:02,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:12:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:12:02,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:12:02,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169662631] [2023-02-15 19:12:02,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169662631] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:12:02,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107355800] [2023-02-15 19:12:02,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 19:12:02,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:12:02,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:12:02,291 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:12:02,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 19:12:02,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 19:12:02,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:12:02,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 19:12:02,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:12:02,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:12:02,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:12:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:12:02,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107355800] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:12:02,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:12:02,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-15 19:12:02,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916658896] [2023-02-15 19:12:02,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:12:02,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 19:12:02,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:12:02,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 19:12:02,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-15 19:12:02,400 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:12:02,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:12:02,450 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2023-02-15 19:12:02,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 19:12:02,451 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-15 19:12:02,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:12:02,451 INFO L225 Difference]: With dead ends: 37 [2023-02-15 19:12:02,451 INFO L226 Difference]: Without dead ends: 25 [2023-02-15 19:12:02,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-02-15 19:12:02,452 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:12:02,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 21 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:12:02,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-15 19:12:02,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2023-02-15 19:12:02,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:12:02,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-02-15 19:12:02,456 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2023-02-15 19:12:02,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:12:02,456 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-02-15 19:12:02,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:12:02,456 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-02-15 19:12:02,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 19:12:02,457 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:12:02,457 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:12:02,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 19:12:02,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:12:02,662 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:12:02,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:12:02,662 INFO L85 PathProgramCache]: Analyzing trace with hash 634982145, now seen corresponding path program 4 times [2023-02-15 19:12:02,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:12:02,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838126545] [2023-02-15 19:12:02,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:12:02,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:12:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:12:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:12:03,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:12:03,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838126545] [2023-02-15 19:12:03,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838126545] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:12:03,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263079791] [2023-02-15 19:12:03,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 19:12:03,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:12:03,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:12:03,126 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:12:03,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 19:12:03,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 19:12:03,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:12:03,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-15 19:12:03,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:12:03,180 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 11 treesize of output 7 [2023-02-15 19:12:03,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2023-02-15 19:12:03,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 19:12:03,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 19:12:03,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2023-02-15 19:12:03,453 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-02-15 19:12:03,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 41 [2023-02-15 19:12:03,557 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-02-15 19:12:03,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 34 [2023-02-15 19:12:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:12:03,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:12:04,226 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (|v_ULTIMATE.start_main_~i~0#1_44| Int) (|v_ULTIMATE.start_main_~i~0#1_43| Int) (v_ArrVal_155 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_155))) (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse0 (select v_ArrVal_155 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_44| 4)))) (.cse2 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse1 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse2))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_43| 4))))) (or (< |c_ULTIMATE.start_main_~i~0#1| |v_ULTIMATE.start_main_~i~0#1_43|) (not (= 4 .cse0)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_44| 1) |v_ULTIMATE.start_main_~i~0#1_43|)) (< (+ (* 4 |c_ULTIMATE.start_main_~i~0#1|) 3) (+ .cse0 .cse1 .cse2)) (not (<= 0 |v_ULTIMATE.start_main_~i~0#1_44|)) (not (= 4 .cse1)))))))) (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (|v_ULTIMATE.start_main_~i~0#1_44| Int) (|v_ULTIMATE.start_main_~i~0#1_43| Int) (v_ArrVal_155 (Array Int Int))) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_155))) (let ((.cse9 (select .cse8 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse5 (select v_ArrVal_155 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_44| 4)))) (.cse7 (select .cse9 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse6 (select (select (store .cse8 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse9 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse5 .cse7))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_43| 4))))) (or (< (+ .cse5 .cse6 .cse7) (+ (* 4 |v_ULTIMATE.start_main_~i~0#1_43|) 5)) (< |c_ULTIMATE.start_main_~i~0#1| |v_ULTIMATE.start_main_~i~0#1_43|) (not (= 4 .cse5)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_44| 1) |v_ULTIMATE.start_main_~i~0#1_43|)) (not (<= 0 |v_ULTIMATE.start_main_~i~0#1_44|)) (not (= 4 .cse6))))))))) is different from false [2023-02-15 19:12:04,273 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (and (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (|v_ULTIMATE.start_main_~i~0#1_44| Int) (|v_ULTIMATE.start_main_~i~0#1_43| Int) (v_ArrVal_155 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_155))) (let ((.cse5 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse0 (select v_ArrVal_155 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_44| 4)))) (.cse2 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse1 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse2))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_43| 4))))) (or (< (+ .cse0 .cse1 .cse2) (+ (* 4 |v_ULTIMATE.start_main_~i~0#1_43|) 5)) (not (= 4 .cse0)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_44| 1) |v_ULTIMATE.start_main_~i~0#1_43|)) (not (<= 0 |v_ULTIMATE.start_main_~i~0#1_44|)) (< .cse3 |v_ULTIMATE.start_main_~i~0#1_43|) (not (= 4 .cse1)))))))) (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (|v_ULTIMATE.start_main_~i~0#1_44| Int) (|v_ULTIMATE.start_main_~i~0#1_43| Int) (v_ArrVal_155 (Array Int Int))) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_155))) (let ((.cse10 (select .cse9 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse6 (select v_ArrVal_155 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_44| 4)))) (.cse8 (select .cse10 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse7 (select (select (store .cse9 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse6 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_43| 4))))) (or (< (+ (* 4 |c_ULTIMATE.start_main_~i~0#1|) 7) (+ .cse6 .cse7 .cse8)) (not (= 4 .cse6)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_44| 1) |v_ULTIMATE.start_main_~i~0#1_43|)) (not (<= 0 |v_ULTIMATE.start_main_~i~0#1_44|)) (< .cse3 |v_ULTIMATE.start_main_~i~0#1_43|) (not (= 4 .cse7)))))))))) is different from false [2023-02-15 19:12:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-02-15 19:12:04,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263079791] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:12:04,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:12:04,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 35 [2023-02-15 19:12:04,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5630280] [2023-02-15 19:12:04,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:12:04,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-15 19:12:04,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:12:04,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-15 19:12:04,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=940, Unknown=2, NotChecked=126, Total=1190 [2023-02-15 19:12:04,346 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 35 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:12:11,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-15 19:12:20,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-02-15 19:12:22,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-02-15 19:12:24,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-15 19:12:26,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-15 19:12:31,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2023-02-15 19:12:34,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:12:34,675 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2023-02-15 19:12:34,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-15 19:12:34,676 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-15 19:12:34,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:12:34,678 INFO L225 Difference]: With dead ends: 52 [2023-02-15 19:12:34,678 INFO L226 Difference]: Without dead ends: 41 [2023-02-15 19:12:34,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=372, Invalid=2491, Unknown=7, NotChecked=210, Total=3080 [2023-02-15 19:12:34,680 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 41 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 57 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2023-02-15 19:12:34,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 67 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 469 Invalid, 6 Unknown, 71 Unchecked, 13.2s Time] [2023-02-15 19:12:34,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-15 19:12:34,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2023-02-15 19:12:34,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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) [2023-02-15 19:12:34,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2023-02-15 19:12:34,688 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 21 [2023-02-15 19:12:34,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:12:34,688 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2023-02-15 19:12:34,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:12:34,688 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2023-02-15 19:12:34,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 19:12:34,689 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:12:34,689 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:12:34,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 19:12:34,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:12:34,894 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:12:34,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:12:34,894 INFO L85 PathProgramCache]: Analyzing trace with hash 692240447, now seen corresponding path program 1 times [2023-02-15 19:12:34,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:12:34,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835002623] [2023-02-15 19:12:34,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:12:34,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:12:34,902 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 19:12:34,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102159671] [2023-02-15 19:12:34,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:12:34,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:12:34,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:12:34,904 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:12:34,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 19:12:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:12:34,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 19:12:34,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:12:34,986 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 [2023-02-15 19:12:35,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:12:35,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 19:12:35,065 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 15 treesize of output 7 [2023-02-15 19:12:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:12:35,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:12:35,104 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_192 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_192) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4)) 4)) is different from false [2023-02-15 19:12:35,111 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_192 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_192) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) 4)) is different from false [2023-02-15 19:12:35,121 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:12:35,121 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2023-02-15 19:12:35,126 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:12:35,127 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 38 treesize of output 34 [2023-02-15 19:12:35,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 3 [2023-02-15 19:12:35,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-02-15 19:12:35,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:12:35,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835002623] [2023-02-15 19:12:35,164 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 19:12:35,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102159671] [2023-02-15 19:12:35,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102159671] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:12:35,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 19:12:35,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-02-15 19:12:35,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395532488] [2023-02-15 19:12:35,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 19:12:35,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 19:12:35,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:12:35,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 19:12:35,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=126, Unknown=2, NotChecked=46, Total=210 [2023-02-15 19:12:35,165 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:12:35,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:12:35,313 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2023-02-15 19:12:35,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 19:12:35,313 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-15 19:12:35,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:12:35,314 INFO L225 Difference]: With dead ends: 52 [2023-02-15 19:12:35,314 INFO L226 Difference]: Without dead ends: 40 [2023-02-15 19:12:35,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=215, Unknown=2, NotChecked=62, Total=342 [2023-02-15 19:12:35,314 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:12:35,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 56 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 130 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2023-02-15 19:12:35,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-15 19:12:35,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2023-02-15 19:12:35,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:12:35,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2023-02-15 19:12:35,320 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 21 [2023-02-15 19:12:35,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:12:35,320 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2023-02-15 19:12:35,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:12:35,321 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2023-02-15 19:12:35,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 19:12:35,321 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:12:35,321 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:12:35,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 19:12:35,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:12:35,522 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:12:35,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:12:35,523 INFO L85 PathProgramCache]: Analyzing trace with hash -2132829117, now seen corresponding path program 5 times [2023-02-15 19:12:35,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:12:35,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108062697] [2023-02-15 19:12:35,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:12:35,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:12:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:12:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:12:35,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:12:35,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108062697] [2023-02-15 19:12:35,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108062697] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:12:35,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713633342] [2023-02-15 19:12:35,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 19:12:35,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:12:35,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:12:35,605 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:12:35,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 19:12:35,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-15 19:12:35,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:12:35,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 19:12:35,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:12:35,712 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:12:35,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:12:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:12:35,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713633342] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:12:35,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:12:35,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-15 19:12:35,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852671520] [2023-02-15 19:12:35,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:12:35,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 19:12:35,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:12:35,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 19:12:35,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-15 19:12:35,771 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:12:35,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:12:35,897 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2023-02-15 19:12:35,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 19:12:35,897 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 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 [2023-02-15 19:12:35,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:12:35,898 INFO L225 Difference]: With dead ends: 47 [2023-02-15 19:12:35,898 INFO L226 Difference]: Without dead ends: 43 [2023-02-15 19:12:35,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-02-15 19:12:35,899 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 30 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:12:35,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 28 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 19:12:35,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-15 19:12:35,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2023-02-15 19:12:35,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:12:35,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2023-02-15 19:12:35,906 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 23 [2023-02-15 19:12:35,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:12:35,907 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2023-02-15 19:12:35,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:12:35,907 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2023-02-15 19:12:35,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 19:12:35,909 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:12:35,909 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:12:35,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 19:12:36,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:12:36,114 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:12:36,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:12:36,115 INFO L85 PathProgramCache]: Analyzing trace with hash -981578845, now seen corresponding path program 2 times [2023-02-15 19:12:36,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:12:36,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863442265] [2023-02-15 19:12:36,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:12:36,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:12:36,122 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 19:12:36,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1979450757] [2023-02-15 19:12:36,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 19:12:36,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:12:36,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:12:36,124 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:12:36,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 19:12:36,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 19:12:36,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:12:36,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 19:12:36,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:12:36,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:12:36,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:12:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:12:36,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:12:36,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863442265] [2023-02-15 19:12:36,276 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 19:12:36,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979450757] [2023-02-15 19:12:36,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979450757] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:12:36,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 19:12:36,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-02-15 19:12:36,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162740801] [2023-02-15 19:12:36,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 19:12:36,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 19:12:36,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:12:36,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 19:12:36,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-15 19:12:36,279 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:12:36,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:12:36,377 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2023-02-15 19:12:36,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 19:12:36,377 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-15 19:12:36,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:12:36,377 INFO L225 Difference]: With dead ends: 51 [2023-02-15 19:12:36,377 INFO L226 Difference]: Without dead ends: 30 [2023-02-15 19:12:36,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-02-15 19:12:36,378 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:12:36,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 29 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 19:12:36,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-15 19:12:36,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2023-02-15 19:12:36,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:12:36,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-02-15 19:12:36,382 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2023-02-15 19:12:36,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:12:36,383 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-02-15 19:12:36,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:12:36,383 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-02-15 19:12:36,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 19:12:36,383 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:12:36,383 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:12:36,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 19:12:36,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 19:12:36,588 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:12:36,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:12:36,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2121994781, now seen corresponding path program 6 times [2023-02-15 19:12:36,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:12:36,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686620223] [2023-02-15 19:12:36,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:12:36,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:12:36,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:12:37,338 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:12:37,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:12:37,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686620223] [2023-02-15 19:12:37,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686620223] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:12:37,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648079578] [2023-02-15 19:12:37,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 19:12:37,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:12:37,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:12:37,340 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:12:37,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 19:12:37,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-15 19:12:37,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:12:37,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-15 19:12:37,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:12:37,448 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 11 treesize of output 7 [2023-02-15 19:12:37,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:12:37,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 19:12:37,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:12:37,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 19:12:37,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:12:37,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 19:12:37,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:12:37,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2023-02-15 19:12:37,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:12:37,784 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:12:37,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 42 [2023-02-15 19:12:37,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:12:37,956 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:12:37,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 57 [2023-02-15 19:12:38,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:12:38,161 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:12:38,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 33 [2023-02-15 19:12:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 19:12:38,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:12:42,077 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-15 19:12:42,078 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 367 treesize of output 1 [2023-02-15 19:12:42,079 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 19:12:42,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648079578] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:12:42,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:12:42,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 45 [2023-02-15 19:12:42,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540192222] [2023-02-15 19:12:42,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:12:42,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-15 19:12:42,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:12:42,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-15 19:12:42,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1766, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 19:12:42,081 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 45 states, 45 states have (on average 1.4) internal successors, (63), 45 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:13:23,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2023-02-15 19:13:37,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:13:37,886 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2023-02-15 19:13:37,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-15 19:13:37,886 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.4) internal successors, (63), 45 states have internal predecessors, (63), 0 states have call successors, (0), 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 26 [2023-02-15 19:13:37,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:13:37,888 INFO L225 Difference]: With dead ends: 66 [2023-02-15 19:13:37,888 INFO L226 Difference]: Without dead ends: 60 [2023-02-15 19:13:37,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2515 ImplicationChecksByTransitivity, 53.5s TimeCoverageRelationStatistics Valid=1209, Invalid=8103, Unknown=0, NotChecked=0, Total=9312 [2023-02-15 19:13:37,891 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 147 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 92 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-02-15 19:13:37,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 40 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 578 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2023-02-15 19:13:37,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-15 19:13:37,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2023-02-15 19:13:37,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 56 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) [2023-02-15 19:13:37,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2023-02-15 19:13:37,903 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 26 [2023-02-15 19:13:37,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:13:37,903 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2023-02-15 19:13:37,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.4) internal successors, (63), 45 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:13:37,903 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2023-02-15 19:13:37,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 19:13:37,905 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:13:37,905 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:13:37,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 19:13:38,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:13:38,106 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:13:38,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:13:38,107 INFO L85 PathProgramCache]: Analyzing trace with hash -2064736479, now seen corresponding path program 3 times [2023-02-15 19:13:38,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:13:38,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069949345] [2023-02-15 19:13:38,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:13:38,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:13:38,116 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 19:13:38,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [994216340] [2023-02-15 19:13:38,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 19:13:38,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:13:38,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:13:38,133 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:13:38,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 19:13:38,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 19:13:38,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:13:38,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 19:13:38,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:13:38,345 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 [2023-02-15 19:13:38,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:13:38,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-15 19:13:39,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:13:39,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-15 19:13:39,374 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:13:39,375 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 23 treesize of output 19 [2023-02-15 19:13:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 19:13:39,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:13:42,237 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:13:42,240 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2023-02-15 19:13:42,313 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2023-02-15 19:13:42,314 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 42 treesize of output 30 [2023-02-15 19:13:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 19:13:44,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:13:44,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069949345] [2023-02-15 19:13:44,501 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 19:13:44,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994216340] [2023-02-15 19:13:44,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994216340] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:13:44,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 19:13:44,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2023-02-15 19:13:44,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578361412] [2023-02-15 19:13:44,501 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 19:13:44,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 19:13:44,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:13:44,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 19:13:44,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=175, Unknown=3, NotChecked=0, Total=240 [2023-02-15 19:13:44,502 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:13:45,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:13:45,761 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2023-02-15 19:13:45,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 19:13:45,762 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 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 26 [2023-02-15 19:13:45,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:13:45,762 INFO L225 Difference]: With dead ends: 63 [2023-02-15 19:13:45,762 INFO L226 Difference]: Without dead ends: 59 [2023-02-15 19:13:45,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=120, Invalid=257, Unknown=3, NotChecked=0, Total=380 [2023-02-15 19:13:45,763 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 23 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 19:13:45,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 26 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 19:13:45,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-15 19:13:45,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2023-02-15 19:13:45,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:13:45,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2023-02-15 19:13:45,772 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 26 [2023-02-15 19:13:45,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:13:45,772 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2023-02-15 19:13:45,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:13:45,772 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2023-02-15 19:13:45,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 19:13:45,773 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:13:45,773 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:13:45,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 19:13:45,978 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,SelfDestructingSolverStorable11 [2023-02-15 19:13:45,978 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:13:45,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:13:45,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1338916473, now seen corresponding path program 4 times [2023-02-15 19:13:45,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:13:45,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36603703] [2023-02-15 19:13:45,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:13:45,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:13:45,986 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 19:13:45,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117771426] [2023-02-15 19:13:45,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 19:13:45,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:13:45,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:13:45,988 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:13:45,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 19:13:46,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 19:13:46,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:13:46,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 19:13:46,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:13:46,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2023-02-15 19:13:46,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2023-02-15 19:13:46,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2023-02-15 19:13:47,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-02-15 19:13:47,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-02-15 19:13:47,984 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:13:47,985 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 24 treesize of output 21 [2023-02-15 19:13:49,083 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 19:13:49,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:13:52,657 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:13:52,658 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 38 [2023-02-15 19:13:52,712 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-02-15 19:13:52,712 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 38 treesize of output 28 [2023-02-15 19:13:53,307 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:13:53,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:13:53,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36603703] [2023-02-15 19:13:53,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 19:13:53,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117771426] [2023-02-15 19:13:53,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117771426] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:13:53,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 19:13:53,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 33 [2023-02-15 19:13:53,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936067501] [2023-02-15 19:13:53,308 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 19:13:53,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 19:13:53,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:13:53,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 19:13:53,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 19:13:53,309 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 33 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:14:13,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:14:13,266 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2023-02-15 19:14:13,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-15 19:14:13,266 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 33 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-15 19:14:13,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:14:13,267 INFO L225 Difference]: With dead ends: 105 [2023-02-15 19:14:13,267 INFO L226 Difference]: Without dead ends: 101 [2023-02-15 19:14:13,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=1315, Invalid=5005, Unknown=0, NotChecked=0, Total=6320 [2023-02-15 19:14:13,268 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 107 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-02-15 19:14:13,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 56 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-02-15 19:14:13,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-15 19:14:13,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 50. [2023-02-15 19:14:13,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:14:13,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2023-02-15 19:14:13,278 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 31 [2023-02-15 19:14:13,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:14:13,278 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2023-02-15 19:14:13,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 33 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:14:13,279 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2023-02-15 19:14:13,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-15 19:14:13,279 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:14:13,279 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:14:13,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 19:14:13,484 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,SelfDestructingSolverStorable12 [2023-02-15 19:14:13,486 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:14:13,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:14:13,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1239650847, now seen corresponding path program 5 times [2023-02-15 19:14:13,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:14:13,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151446774] [2023-02-15 19:14:13,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:14:13,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:14:13,496 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 19:14:13,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313220532] [2023-02-15 19:14:13,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 19:14:13,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:14:13,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:14:13,498 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:14:13,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 19:14:13,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-15 19:14:13,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:14:13,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 19:14:13,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:14:14,821 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:14:14,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:14:15,770 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:14:15,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:14:15,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151446774] [2023-02-15 19:14:15,770 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 19:14:15,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313220532] [2023-02-15 19:14:15,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313220532] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:14:15,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 19:14:15,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-02-15 19:14:15,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157425905] [2023-02-15 19:14:15,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 19:14:15,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 19:14:15,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:14:15,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 19:14:15,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-02-15 19:14:15,772 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2023-02-15 19:14:18,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:14:18,045 INFO L93 Difference]: Finished difference Result 106 states and 125 transitions. [2023-02-15 19:14:18,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 19:14:18,046 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 34 [2023-02-15 19:14:18,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:14:18,047 INFO L225 Difference]: With dead ends: 106 [2023-02-15 19:14:18,047 INFO L226 Difference]: Without dead ends: 56 [2023-02-15 19:14:18,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2023-02-15 19:14:18,048 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 68 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:14:18,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 32 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-15 19:14:18,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-15 19:14:18,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 43. [2023-02-15 19:14:18,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:14:18,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2023-02-15 19:14:18,056 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 34 [2023-02-15 19:14:18,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:14:18,057 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2023-02-15 19:14:18,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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) [2023-02-15 19:14:18,057 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2023-02-15 19:14:18,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 19:14:18,057 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:14:18,057 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:14:18,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 19:14:18,263 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,SelfDestructingSolverStorable13 [2023-02-15 19:14:18,263 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:14:18,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:14:18,264 INFO L85 PathProgramCache]: Analyzing trace with hash -338157539, now seen corresponding path program 6 times [2023-02-15 19:14:18,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:14:18,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035525698] [2023-02-15 19:14:18,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:14:18,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:14:18,271 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 19:14:18,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1258326546] [2023-02-15 19:14:18,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 19:14:18,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:14:18,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:14:18,273 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:14:18,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 19:14:18,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-02-15 19:14:18,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:14:18,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 19:14:18,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:14:18,824 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 [2023-02-15 19:14:19,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:14:19,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-02-15 19:14:19,506 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 19:14:19,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2023-02-15 19:14:20,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:14:20,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-02-15 19:14:20,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:14:20,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-02-15 19:14:21,289 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 19:14:21,304 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:14:21,304 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 21 treesize of output 14 [2023-02-15 19:14:22,217 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:14:22,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:14:28,464 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_154| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_154|)) (forall ((v_ArrVal_511 Int) (|v_ULTIMATE.start_main_~i~0#1_153| Int) (v_ArrVal_516 (Array Int Int)) (v_ArrVal_513 Int)) (or (= 4 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_154| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_511) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_153| 4)) v_ArrVal_513)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_516) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8))) (< |v_ULTIMATE.start_main_~i~0#1_153| 4))))) is different from false [2023-02-15 19:14:28,769 INFO L321 Elim1Store]: treesize reduction 76, result has 42.0 percent of original size [2023-02-15 19:14:28,770 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 67 [2023-02-15 19:14:28,976 INFO L321 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2023-02-15 19:14:28,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 68 treesize of output 66 [2023-02-15 19:14:29,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 3 [2023-02-15 19:14:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-02-15 19:14:29,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:14:29,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035525698] [2023-02-15 19:14:29,940 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 19:14:29,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258326546] [2023-02-15 19:14:29,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258326546] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:14:29,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 19:14:29,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2023-02-15 19:14:29,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459919279] [2023-02-15 19:14:29,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 19:14:29,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-15 19:14:29,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:14:29,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-15 19:14:29,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=981, Unknown=7, NotChecked=66, Total=1260 [2023-02-15 19:14:29,942 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 36 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:14:37,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:14:37,263 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2023-02-15 19:14:37,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 19:14:37,264 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 36 states have internal predecessors, (62), 0 states have call successors, (0), 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 36 [2023-02-15 19:14:37,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:14:37,264 INFO L225 Difference]: With dead ends: 57 [2023-02-15 19:14:37,264 INFO L226 Difference]: Without dead ends: 43 [2023-02-15 19:14:37,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=352, Invalid=1537, Unknown=7, NotChecked=84, Total=1980 [2023-02-15 19:14:37,265 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 31 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-02-15 19:14:37,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 49 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 306 Invalid, 0 Unknown, 31 Unchecked, 2.9s Time] [2023-02-15 19:14:37,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-15 19:14:37,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-02-15 19:14:37,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 42 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) [2023-02-15 19:14:37,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2023-02-15 19:14:37,276 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 36 [2023-02-15 19:14:37,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:14:37,276 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2023-02-15 19:14:37,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 36 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:14:37,276 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2023-02-15 19:14:37,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 19:14:37,277 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:14:37,277 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:14:37,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 19:14:37,483 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,SelfDestructingSolverStorable14 [2023-02-15 19:14:37,483 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:14:37,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:14:37,483 INFO L85 PathProgramCache]: Analyzing trace with hash 724113925, now seen corresponding path program 7 times [2023-02-15 19:14:37,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:14:37,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161043756] [2023-02-15 19:14:37,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:14:37,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:14:37,491 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 19:14:37,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [959205543] [2023-02-15 19:14:37,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 19:14:37,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:14:37,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:14:37,493 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:14:37,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 19:14:37,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:14:37,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 19:14:37,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:14:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:14:39,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:14:40,382 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:14:40,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:14:40,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161043756] [2023-02-15 19:14:40,382 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 19:14:40,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959205543] [2023-02-15 19:14:40,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959205543] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:14:40,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 19:14:40,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2023-02-15 19:14:40,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684192225] [2023-02-15 19:14:40,382 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 19:14:40,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 19:14:40,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:14:40,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 19:14:40,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2023-02-15 19:14:40,383 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:14:42,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:14:42,135 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2023-02-15 19:14:42,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 19:14:42,136 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-15 19:14:42,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:14:42,136 INFO L225 Difference]: With dead ends: 92 [2023-02-15 19:14:42,136 INFO L226 Difference]: Without dead ends: 58 [2023-02-15 19:14:42,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2023-02-15 19:14:42,137 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 80 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:14:42,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 27 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-15 19:14:42,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-15 19:14:42,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2023-02-15 19:14:42,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 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) [2023-02-15 19:14:42,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2023-02-15 19:14:42,146 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 39 [2023-02-15 19:14:42,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:14:42,146 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2023-02-15 19:14:42,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:14:42,146 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2023-02-15 19:14:42,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 19:14:42,147 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:14:42,147 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:14:42,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 19:14:42,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:14:42,358 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:14:42,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:14:42,359 INFO L85 PathProgramCache]: Analyzing trace with hash -294413625, now seen corresponding path program 8 times [2023-02-15 19:14:42,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:14:42,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099294216] [2023-02-15 19:14:42,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:14:42,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:14:42,367 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 19:14:42,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332191243] [2023-02-15 19:14:42,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 19:14:42,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:14:42,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:14:42,369 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:14:42,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 19:14:42,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 19:14:42,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:14:42,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-15 19:14:42,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:14:43,046 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 [2023-02-15 19:14:43,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:14:43,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-02-15 19:14:43,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:14:43,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-02-15 19:14:44,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:14:44,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 19:14:44,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:14:44,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 19:14:44,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:14:44,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 19:14:45,204 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 15 treesize of output 7 [2023-02-15 19:14:45,346 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 30 proven. 50 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 19:14:45,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:14:45,813 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_645 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_645) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4)) 4)) is different from false [2023-02-15 19:14:49,921 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_645 (Array Int Int)) (v_ArrVal_642 Int) (|v_ULTIMATE.start_main_~i~0#1_197| Int) (v_ArrVal_639 Int)) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) v_ArrVal_639) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_197| 4)) v_ArrVal_642)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_645) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12)) 4) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_197|)))) is different from false [2023-02-15 19:14:52,192 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_198| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_198|)) (forall ((v_ArrVal_645 (Array Int Int)) (v_ArrVal_642 Int) (|v_ULTIMATE.start_main_~i~0#1_197| Int) (v_ArrVal_639 Int)) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_198| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_639) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_197| 4)) v_ArrVal_642)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_645) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12)) 4) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_198| 1) |v_ULTIMATE.start_main_~i~0#1_197|)))))) is different from false [2023-02-15 19:14:52,410 INFO L321 Elim1Store]: treesize reduction 94, result has 28.2 percent of original size [2023-02-15 19:14:52,410 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 49 [2023-02-15 19:14:52,460 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 19:14:52,460 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 38 treesize of output 34 [2023-02-15 19:14:52,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 3 [2023-02-15 19:14:53,503 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 29 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 17 not checked. [2023-02-15 19:14:53,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:14:53,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099294216] [2023-02-15 19:14:53,504 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 19:14:53,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332191243] [2023-02-15 19:14:53,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332191243] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:14:53,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 19:14:53,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2023-02-15 19:14:53,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548194430] [2023-02-15 19:14:53,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 19:14:53,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-15 19:14:53,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:14:53,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-15 19:14:53,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=591, Unknown=22, NotChecked=156, Total=870 [2023-02-15 19:14:53,506 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:14:57,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:14:57,600 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2023-02-15 19:14:57,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 19:14:57,601 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 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 [2023-02-15 19:14:57,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:14:57,601 INFO L225 Difference]: With dead ends: 58 [2023-02-15 19:14:57,601 INFO L226 Difference]: Without dead ends: 46 [2023-02-15 19:14:57,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=145, Invalid=901, Unknown=22, NotChecked=192, Total=1260 [2023-02-15 19:14:57,602 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 27 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:14:57,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 74 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 499 Invalid, 0 Unknown, 114 Unchecked, 3.0s Time] [2023-02-15 19:14:57,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-02-15 19:14:57,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2023-02-15 19:14:57,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:14:57,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2023-02-15 19:14:57,610 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 41 [2023-02-15 19:14:57,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:14:57,610 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2023-02-15 19:14:57,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:14:57,611 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2023-02-15 19:14:57,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 19:14:57,611 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:14:57,611 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:14:57,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 19:14:57,811 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,SelfDestructingSolverStorable16 [2023-02-15 19:14:57,812 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:14:57,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:14:57,812 INFO L85 PathProgramCache]: Analyzing trace with hash -2029167523, now seen corresponding path program 7 times [2023-02-15 19:14:57,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:14:57,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131525530] [2023-02-15 19:14:57,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:14:57,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:14:57,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:14:59,137 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 54 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:14:59,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:14:59,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131525530] [2023-02-15 19:14:59,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131525530] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:14:59,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429699392] [2023-02-15 19:14:59,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 19:14:59,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:14:59,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:14:59,139 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:14:59,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 19:14:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:14:59,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 19:14:59,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:15:01,056 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:15:01,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:15:02,446 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:15:02,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429699392] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:15:02,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:15:02,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-02-15 19:15:02,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29850770] [2023-02-15 19:15:02,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:15:02,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-15 19:15:02,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:15:02,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-15 19:15:02,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-02-15 19:15:02,448 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 26 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:15:04,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:15:04,319 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2023-02-15 19:15:04,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 19:15:04,320 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 26 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-02-15 19:15:04,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:15:04,320 INFO L225 Difference]: With dead ends: 94 [2023-02-15 19:15:04,320 INFO L226 Difference]: Without dead ends: 60 [2023-02-15 19:15:04,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 65 SyntacticMatches, 14 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 19:15:04,321 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 55 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-15 19:15:04,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 35 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-15 19:15:04,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-15 19:15:04,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 47. [2023-02-15 19:15:04,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:15:04,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-02-15 19:15:04,331 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 44 [2023-02-15 19:15:04,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:15:04,331 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-02-15 19:15:04,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 26 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:15:04,331 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-02-15 19:15:04,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 19:15:04,331 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:15:04,331 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:15:04,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-15 19:15:04,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-15 19:15:04,534 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:15:04,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:15:04,534 INFO L85 PathProgramCache]: Analyzing trace with hash -111213349, now seen corresponding path program 8 times [2023-02-15 19:15:04,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:15:04,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299932483] [2023-02-15 19:15:04,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:15:04,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:15:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:15:17,499 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:15:17,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:15:17,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299932483] [2023-02-15 19:15:17,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299932483] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:15:17,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004733372] [2023-02-15 19:15:17,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 19:15:17,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:15:17,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:15:17,501 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:15:17,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 19:15:17,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 19:15:17,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:15:17,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 99 conjunts are in the unsatisfiable core [2023-02-15 19:15:17,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:15:18,455 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 11 treesize of output 7 [2023-02-15 19:15:18,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:15:18,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 19:15:19,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:15:19,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 19:15:20,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:15:20,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 19:15:21,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:15:21,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 19:15:22,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:15:22,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 19:15:23,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:15:23,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 19:15:23,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:15:23,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-15 19:15:25,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:15:25,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2023-02-15 19:15:26,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:15:26,953 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-02-15 19:15:26,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2023-02-15 19:15:28,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:15:28,314 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-02-15 19:15:28,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2023-02-15 19:15:29,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:15:29,679 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-02-15 19:15:29,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 43 [2023-02-15 19:15:30,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:15:30,966 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-02-15 19:15:30,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 43 [2023-02-15 19:15:32,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:15:32,300 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2023-02-15 19:15:32,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 60 [2023-02-15 19:15:33,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:15:33,805 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2023-02-15 19:15:33,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 60 [2023-02-15 19:15:34,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 19:15:34,655 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2023-02-15 19:15:34,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 35 [2023-02-15 19:15:35,165 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:15:35,166 INFO L328 TraceCheckSpWp]: Computing backward predicates...