./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/indp2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c 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/indp2.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 22448626353835b24dede83f92858a925e988e04b05430a9ca91763be927cf92 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 21:10:10,832 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 21:10:10,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 21:10:10,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 21:10:10,866 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 21:10:10,868 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 21:10:10,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 21:10:10,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 21:10:10,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 21:10:10,877 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 21:10:10,878 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 21:10:10,879 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 21:10:10,879 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 21:10:10,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 21:10:10,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 21:10:10,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 21:10:10,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 21:10:10,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 21:10:10,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 21:10:10,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 21:10:10,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 21:10:10,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 21:10:10,891 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 21:10:10,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 21:10:10,898 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 21:10:10,898 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 21:10:10,898 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 21:10:10,899 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 21:10:10,899 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 21:10:10,900 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 21:10:10,900 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 21:10:10,900 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 21:10:10,901 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 21:10:10,903 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 21:10:10,903 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 21:10:10,904 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 21:10:10,904 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 21:10:10,904 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 21:10:10,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 21:10:10,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 21:10:10,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 21:10:10,907 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 21:10:10,930 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 21:10:10,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 21:10:10,931 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 21:10:10,931 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 21:10:10,931 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 21:10:10,931 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 21:10:10,932 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 21:10:10,932 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 21:10:10,932 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 21:10:10,932 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 21:10:10,933 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 21:10:10,933 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 21:10:10,933 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 21:10:10,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 21:10:10,934 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 21:10:10,934 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 21:10:10,934 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 21:10:10,934 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 21:10:10,934 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 21:10:10,934 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 21:10:10,934 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 21:10:10,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 21:10:10,935 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 21:10:10,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 21:10:10,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 21:10:10,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 21:10:10,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 21:10:10,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 21:10:10,936 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 21:10:10,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 21:10:10,936 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 21:10:10,936 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 21:10:10,936 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 21:10:10,937 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 21:10:10,937 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 21:10:10,937 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22448626353835b24dede83f92858a925e988e04b05430a9ca91763be927cf92 [2023-02-17 21:10:11,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 21:10:11,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 21:10:11,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 21:10:11,146 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 21:10:11,148 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 21:10:11,149 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/indp2.c [2023-02-17 21:10:12,069 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 21:10:12,212 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 21:10:12,213 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/indp2.c [2023-02-17 21:10:12,217 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f407a65a5/7c20f016319a4874aabc410a66d1d235/FLAGd51533d17 [2023-02-17 21:10:12,226 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f407a65a5/7c20f016319a4874aabc410a66d1d235 [2023-02-17 21:10:12,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 21:10:12,230 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 21:10:12,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 21:10:12,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 21:10:12,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 21:10:12,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 09:10:12" (1/1) ... [2023-02-17 21:10:12,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c3a1e6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:10:12, skipping insertion in model container [2023-02-17 21:10:12,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 09:10:12" (1/1) ... [2023-02-17 21:10:12,245 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 21:10:12,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 21:10:12,371 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/indp2.c[588,601] [2023-02-17 21:10:12,389 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 21:10:12,399 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 21:10:12,410 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/indp2.c[588,601] [2023-02-17 21:10:12,420 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 21:10:12,430 INFO L208 MainTranslator]: Completed translation [2023-02-17 21:10:12,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:10:12 WrapperNode [2023-02-17 21:10:12,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 21:10:12,431 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 21:10:12,432 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 21:10:12,432 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 21:10:12,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:10:12" (1/1) ... [2023-02-17 21:10:12,447 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:10:12" (1/1) ... [2023-02-17 21:10:12,465 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 82 [2023-02-17 21:10:12,466 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 21:10:12,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 21:10:12,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 21:10:12,466 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 21:10:12,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:10:12" (1/1) ... [2023-02-17 21:10:12,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:10:12" (1/1) ... [2023-02-17 21:10:12,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:10:12" (1/1) ... [2023-02-17 21:10:12,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:10:12" (1/1) ... [2023-02-17 21:10:12,488 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:10:12" (1/1) ... [2023-02-17 21:10:12,492 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:10:12" (1/1) ... [2023-02-17 21:10:12,495 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:10:12" (1/1) ... [2023-02-17 21:10:12,496 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:10:12" (1/1) ... [2023-02-17 21:10:12,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 21:10:12,501 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 21:10:12,501 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 21:10:12,501 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 21:10:12,502 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:10:12" (1/1) ... [2023-02-17 21:10:12,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 21:10:12,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 21:10:12,529 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) [2023-02-17 21:10:12,548 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 [2023-02-17 21:10:12,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 21:10:12,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 21:10:12,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 21:10:12,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 21:10:12,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 21:10:12,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 21:10:12,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 21:10:12,608 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 21:10:12,610 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 21:10:12,753 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 21:10:12,757 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 21:10:12,757 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-17 21:10:12,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 09:10:12 BoogieIcfgContainer [2023-02-17 21:10:12,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 21:10:12,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 21:10:12,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 21:10:12,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 21:10:12,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 09:10:12" (1/3) ... [2023-02-17 21:10:12,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355b8c8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 09:10:12, skipping insertion in model container [2023-02-17 21:10:12,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:10:12" (2/3) ... [2023-02-17 21:10:12,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355b8c8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 09:10:12, skipping insertion in model container [2023-02-17 21:10:12,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 09:10:12" (3/3) ... [2023-02-17 21:10:12,769 INFO L112 eAbstractionObserver]: Analyzing ICFG indp2.c [2023-02-17 21:10:12,781 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 21:10:12,781 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 21:10:12,820 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 21:10:12,825 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;@4b03b45d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 21:10:12,826 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 21:10:12,829 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 21:10:12,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-17 21:10:12,833 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 21:10:12,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 21:10:12,841 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 21:10:12,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 21:10:12,846 INFO L85 PathProgramCache]: Analyzing trace with hash -592971038, now seen corresponding path program 1 times [2023-02-17 21:10:12,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 21:10:12,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556449961] [2023-02-17 21:10:12,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 21:10:12,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 21:10:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 21:10:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 21:10:13,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 21:10:13,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556449961] [2023-02-17 21:10:13,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556449961] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 21:10:13,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 21:10:13,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 21:10:13,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675965464] [2023-02-17 21:10:13,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 21:10:13,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 21:10:13,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 21:10:13,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 21:10:13,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 21:10:13,040 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 21:10:13,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 21:10:13,050 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2023-02-17 21:10:13,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 21:10:13,052 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2023-02-17 21:10:13,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 21:10:13,056 INFO L225 Difference]: With dead ends: 44 [2023-02-17 21:10:13,056 INFO L226 Difference]: Without dead ends: 20 [2023-02-17 21:10:13,058 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 [2023-02-17 21:10:13,060 INFO L413 NwaCegarLoop]: 28 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, 28 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 [2023-02-17 21:10:13,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 21:10:13,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-17 21:10:13,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-02-17 21:10:13,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 21:10:13,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-02-17 21:10:13,080 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2023-02-17 21:10:13,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 21:10:13,082 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-02-17 21:10:13,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 21:10:13,082 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-02-17 21:10:13,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-17 21:10:13,083 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 21:10:13,083 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 21:10:13,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 21:10:13,084 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 21:10:13,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 21:10:13,085 INFO L85 PathProgramCache]: Analyzing trace with hash 108093540, now seen corresponding path program 1 times [2023-02-17 21:10:13,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 21:10:13,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886943481] [2023-02-17 21:10:13,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 21:10:13,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 21:10:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 21:10:13,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 21:10:13,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 21:10:13,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886943481] [2023-02-17 21:10:13,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886943481] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 21:10:13,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 21:10:13,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 21:10:13,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018148811] [2023-02-17 21:10:13,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 21:10:13,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 21:10:13,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 21:10:13,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 21:10:13,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 21:10:13,222 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 21:10:13,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 21:10:13,309 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2023-02-17 21:10:13,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 21:10:13,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2023-02-17 21:10:13,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 21:10:13,311 INFO L225 Difference]: With dead ends: 45 [2023-02-17 21:10:13,311 INFO L226 Difference]: Without dead ends: 32 [2023-02-17 21:10:13,312 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 [2023-02-17 21:10:13,313 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 21:10:13,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 16 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 21:10:13,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-17 21:10:13,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2023-02-17 21:10:13,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 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) [2023-02-17 21:10:13,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-02-17 21:10:13,321 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2023-02-17 21:10:13,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 21:10:13,322 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-02-17 21:10:13,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 21:10:13,323 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-02-17 21:10:13,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-17 21:10:13,325 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 21:10:13,325 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 21:10:13,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 21:10:13,326 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 21:10:13,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 21:10:13,329 INFO L85 PathProgramCache]: Analyzing trace with hash 615941150, now seen corresponding path program 1 times [2023-02-17 21:10:13,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 21:10:13,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019215054] [2023-02-17 21:10:13,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 21:10:13,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 21:10:13,351 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 21:10:13,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [562505692] [2023-02-17 21:10:13,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 21:10:13,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 21:10:13,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 21:10:13,364 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) [2023-02-17 21:10:13,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 21:10:13,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 21:10:13,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-17 21:10:13,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 21:10:13,498 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 21 treesize of output 17 [2023-02-17 21:10:13,523 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 0 case distinctions, treesize of input 46 treesize of output 26 [2023-02-17 21:10:13,538 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 0 case distinctions, treesize of input 43 treesize of output 23 [2023-02-17 21:10:13,557 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 52 treesize of output 28 [2023-02-17 21:10:13,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 21:10:13,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 21:10:13,650 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 24 [2023-02-17 21:10:13,654 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 48 treesize of output 42 [2023-02-17 21:10:13,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 21:10:13,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 21:10:13,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019215054] [2023-02-17 21:10:13,667 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 21:10:13,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562505692] [2023-02-17 21:10:13,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562505692] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 21:10:13,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 21:10:13,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2023-02-17 21:10:13,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124650326] [2023-02-17 21:10:13,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 21:10:13,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 21:10:13,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 21:10:13,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 21:10:13,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-02-17 21:10:13,672 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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) [2023-02-17 21:10:13,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 21:10:13,864 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2023-02-17 21:10:13,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-17 21:10:13,865 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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 20 [2023-02-17 21:10:13,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 21:10:13,866 INFO L225 Difference]: With dead ends: 55 [2023-02-17 21:10:13,866 INFO L226 Difference]: Without dead ends: 53 [2023-02-17 21:10:13,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2023-02-17 21:10:13,871 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 119 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 21:10:13,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 100 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 21:10:13,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-17 21:10:13,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2023-02-17 21:10:13,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 21:10:13,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2023-02-17 21:10:13,884 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 20 [2023-02-17 21:10:13,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 21:10:13,885 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2023-02-17 21:10:13,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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) [2023-02-17 21:10:13,886 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2023-02-17 21:10:13,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 21:10:13,887 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 21:10:13,887 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 21:10:13,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 21:10:14,092 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 [2023-02-17 21:10:14,093 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 21:10:14,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 21:10:14,093 INFO L85 PathProgramCache]: Analyzing trace with hash 678263444, now seen corresponding path program 1 times [2023-02-17 21:10:14,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 21:10:14,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196679212] [2023-02-17 21:10:14,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 21:10:14,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 21:10:14,115 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 21:10:14,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1145808128] [2023-02-17 21:10:14,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 21:10:14,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 21:10:14,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 21:10:14,119 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) [2023-02-17 21:10:14,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 21:10:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 21:10:14,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 21:10:14,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 21:10:14,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 21:10:14,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 21:10:14,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 21:10:14,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 21:10:14,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196679212] [2023-02-17 21:10:14,216 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 21:10:14,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145808128] [2023-02-17 21:10:14,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145808128] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 21:10:14,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 21:10:14,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-17 21:10:14,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856240048] [2023-02-17 21:10:14,217 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 21:10:14,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 21:10:14,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 21:10:14,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 21:10:14,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-17 21:10:14,218 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2023-02-17 21:10:14,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 21:10:14,294 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2023-02-17 21:10:14,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 21:10:14,294 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 24 [2023-02-17 21:10:14,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 21:10:14,295 INFO L225 Difference]: With dead ends: 84 [2023-02-17 21:10:14,295 INFO L226 Difference]: Without dead ends: 48 [2023-02-17 21:10:14,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-02-17 21:10:14,296 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 21:10:14,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 21:10:14,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-17 21:10:14,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2023-02-17 21:10:14,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 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) [2023-02-17 21:10:14,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2023-02-17 21:10:14,302 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 24 [2023-02-17 21:10:14,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 21:10:14,302 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2023-02-17 21:10:14,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2023-02-17 21:10:14,302 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2023-02-17 21:10:14,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-17 21:10:14,303 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 21:10:14,303 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 21:10:14,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-17 21:10:14,510 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 [2023-02-17 21:10:14,511 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 21:10:14,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 21:10:14,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1587482582, now seen corresponding path program 2 times [2023-02-17 21:10:14,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 21:10:14,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716024906] [2023-02-17 21:10:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 21:10:14,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 21:10:14,525 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 21:10:14,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983443313] [2023-02-17 21:10:14,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 21:10:14,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 21:10:14,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 21:10:14,529 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) [2023-02-17 21:10:14,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 21:10:14,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 21:10:14,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 21:10:14,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 21:10:14,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 21:10:14,628 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 21:10:14,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 21:10:14,655 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 21:10:14,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 21:10:14,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716024906] [2023-02-17 21:10:14,656 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 21:10:14,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983443313] [2023-02-17 21:10:14,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983443313] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 21:10:14,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 21:10:14,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-02-17 21:10:14,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855924937] [2023-02-17 21:10:14,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 21:10:14,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 21:10:14,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 21:10:14,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 21:10:14,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-17 21:10:14,658 INFO L87 Difference]: Start difference. First operand 34 states and 38 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) [2023-02-17 21:10:14,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 21:10:14,761 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2023-02-17 21:10:14,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 21:10:14,763 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 28 [2023-02-17 21:10:14,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 21:10:14,766 INFO L225 Difference]: With dead ends: 102 [2023-02-17 21:10:14,766 INFO L226 Difference]: Without dead ends: 79 [2023-02-17 21:10:14,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-02-17 21:10:14,767 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 73 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 21:10:14,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 62 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 21:10:14,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-17 21:10:14,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 54. [2023-02-17 21:10:14,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 21:10:14,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2023-02-17 21:10:14,775 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 28 [2023-02-17 21:10:14,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 21:10:14,776 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2023-02-17 21:10:14,776 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) [2023-02-17 21:10:14,776 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2023-02-17 21:10:14,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-17 21:10:14,777 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 21:10:14,777 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 21:10:14,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-17 21:10:14,983 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 [2023-02-17 21:10:14,984 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 21:10:14,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 21:10:14,984 INFO L85 PathProgramCache]: Analyzing trace with hash 341343694, now seen corresponding path program 2 times [2023-02-17 21:10:14,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 21:10:14,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100046836] [2023-02-17 21:10:14,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 21:10:14,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 21:10:14,993 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 21:10:14,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287494896] [2023-02-17 21:10:14,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 21:10:14,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 21:10:14,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 21:10:14,995 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) [2023-02-17 21:10:14,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 21:10:15,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 21:10:15,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 21:10:15,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-17 21:10:15,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 21:10:15,081 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 21 treesize of output 17 [2023-02-17 21:10:15,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 21:10:15,112 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 33 treesize of output 32 [2023-02-17 21:10:15,127 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 0 case distinctions, treesize of input 46 treesize of output 26 [2023-02-17 21:10:15,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 21:10:15,154 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 38 treesize of output 37 [2023-02-17 21:10:15,170 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 21:10:15,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 52 treesize of output 46 [2023-02-17 21:10:15,193 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 50 treesize of output 26 [2023-02-17 21:10:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 21:10:15,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 21:10:15,391 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 24 [2023-02-17 21:10:15,393 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 50 treesize of output 42 [2023-02-17 21:10:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 21:10:15,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 21:10:15,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100046836] [2023-02-17 21:10:15,422 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 21:10:15,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287494896] [2023-02-17 21:10:15,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287494896] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 21:10:15,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 21:10:15,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2023-02-17 21:10:15,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898890134] [2023-02-17 21:10:15,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 21:10:15,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-17 21:10:15,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 21:10:15,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-17 21:10:15,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2023-02-17 21:10:15,425 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 21:10:16,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 21:10:16,011 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2023-02-17 21:10:16,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-17 21:10:16,011 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-02-17 21:10:16,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 21:10:16,012 INFO L225 Difference]: With dead ends: 124 [2023-02-17 21:10:16,012 INFO L226 Difference]: Without dead ends: 103 [2023-02-17 21:10:16,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=335, Invalid=2017, Unknown=0, NotChecked=0, Total=2352 [2023-02-17 21:10:16,013 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 202 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 21:10:16,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 214 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 21:10:16,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-02-17 21:10:16,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 63. [2023-02-17 21:10:16,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 62 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 21:10:16,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2023-02-17 21:10:16,023 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 30 [2023-02-17 21:10:16,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 21:10:16,023 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2023-02-17 21:10:16,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 21:10:16,023 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2023-02-17 21:10:16,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-17 21:10:16,024 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 21:10:16,024 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 21:10:16,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 21:10:16,229 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 [2023-02-17 21:10:16,229 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 21:10:16,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 21:10:16,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1505554158, now seen corresponding path program 3 times [2023-02-17 21:10:16,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 21:10:16,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314649943] [2023-02-17 21:10:16,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 21:10:16,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 21:10:16,240 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 21:10:16,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1242613092] [2023-02-17 21:10:16,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 21:10:16,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 21:10:16,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 21:10:16,242 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) [2023-02-17 21:10:16,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 21:10:16,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-17 21:10:16,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 21:10:16,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-17 21:10:16,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 21:10:16,326 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 21 treesize of output 17 [2023-02-17 21:10:16,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 21:10:16,343 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 33 treesize of output 32 [2023-02-17 21:10:16,356 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 21:10:16,357 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 33 treesize of output 68 [2023-02-17 21:10:16,400 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 21:10:16,401 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 21:10:16,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 50 treesize of output 49 [2023-02-17 21:10:16,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 21:10:16,427 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 37 treesize of output 36 [2023-02-17 21:10:16,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 21:10:16,450 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 37 treesize of output 36 [2023-02-17 21:10:16,475 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 21:10:16,476 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 21:10:16,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 47 treesize of output 43 [2023-02-17 21:10:16,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 21:10:16,505 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 39 treesize of output 38 [2023-02-17 21:10:16,521 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 21:10:16,521 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 39 treesize of output 74 [2023-02-17 21:10:16,587 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 52 treesize of output 28 [2023-02-17 21:10:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 21:10:16,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 21:10:33,894 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 110 treesize of output 106 [2023-02-17 21:10:33,911 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 8276 treesize of output 8180