./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-properties/simple-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 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/list-properties/simple-2.i -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 a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 10:32:06,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 10:32:06,364 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 10:32:06,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 10:32:06,396 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 10:32:06,397 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 10:32:06,398 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 10:32:06,399 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 10:32:06,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 10:32:06,401 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 10:32:06,402 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 10:32:06,403 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 10:32:06,404 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 10:32:06,406 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 10:32:06,407 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 10:32:06,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 10:32:06,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 10:32:06,412 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 10:32:06,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 10:32:06,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 10:32:06,416 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 10:32:06,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 10:32:06,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 10:32:06,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 10:32:06,421 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 10:32:06,424 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 10:32:06,424 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 10:32:06,425 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 10:32:06,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 10:32:06,426 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 10:32:06,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 10:32:06,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 10:32:06,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 10:32:06,430 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 10:32:06,431 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 10:32:06,431 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 10:32:06,431 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 10:32:06,431 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 10:32:06,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 10:32:06,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 10:32:06,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 10:32:06,434 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 10:32:06,451 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 10:32:06,451 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 10:32:06,451 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 10:32:06,452 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 10:32:06,452 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 10:32:06,452 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 10:32:06,453 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 10:32:06,453 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 10:32:06,453 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 10:32:06,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 10:32:06,454 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 10:32:06,454 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 10:32:06,454 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 10:32:06,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 10:32:06,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 10:32:06,455 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 10:32:06,455 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 10:32:06,455 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 10:32:06,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 10:32:06,455 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 10:32:06,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 10:32:06,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 10:32:06,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 10:32:06,456 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 10:32:06,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 10:32:06,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 10:32:06,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 10:32:06,456 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 10:32:06,456 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 10:32:06,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 10:32:06,457 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 10:32:06,457 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 10:32:06,457 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 10:32:06,458 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 10:32:06,458 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 10:32:06,458 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 [2023-02-15 10:32:06,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 10:32:06,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 10:32:06,737 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 10:32:06,738 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 10:32:06,738 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 10:32:06,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/simple-2.i [2023-02-15 10:32:07,780 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 10:32:07,915 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 10:32:07,916 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple-2.i [2023-02-15 10:32:07,924 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b7c42e5f/3f3ce879872947e39a29219ce0cbc8cd/FLAG48d57e827 [2023-02-15 10:32:07,934 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b7c42e5f/3f3ce879872947e39a29219ce0cbc8cd [2023-02-15 10:32:07,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 10:32:07,937 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 10:32:07,938 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 10:32:07,938 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 10:32:07,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 10:32:07,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:32:07" (1/1) ... [2023-02-15 10:32:07,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cc69b89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:32:07, skipping insertion in model container [2023-02-15 10:32:07,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:32:07" (1/1) ... [2023-02-15 10:32:07,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 10:32:07,981 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 10:32:08,186 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/list-properties/simple-2.i[23225,23238] [2023-02-15 10:32:08,191 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 10:32:08,198 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 10:32:08,236 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/list-properties/simple-2.i[23225,23238] [2023-02-15 10:32:08,236 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 10:32:08,266 INFO L208 MainTranslator]: Completed translation [2023-02-15 10:32:08,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:32:08 WrapperNode [2023-02-15 10:32:08,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 10:32:08,267 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 10:32:08,268 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 10:32:08,268 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 10:32:08,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:32:08" (1/1) ... [2023-02-15 10:32:08,280 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:32:08" (1/1) ... [2023-02-15 10:32:08,291 INFO L138 Inliner]: procedures = 124, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 52 [2023-02-15 10:32:08,292 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 10:32:08,292 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 10:32:08,292 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 10:32:08,292 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 10:32:08,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:32:08" (1/1) ... [2023-02-15 10:32:08,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:32:08" (1/1) ... [2023-02-15 10:32:08,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:32:08" (1/1) ... [2023-02-15 10:32:08,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:32:08" (1/1) ... [2023-02-15 10:32:08,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:32:08" (1/1) ... [2023-02-15 10:32:08,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:32:08" (1/1) ... [2023-02-15 10:32:08,306 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:32:08" (1/1) ... [2023-02-15 10:32:08,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:32:08" (1/1) ... [2023-02-15 10:32:08,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 10:32:08,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 10:32:08,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 10:32:08,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 10:32:08,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:32:08" (1/1) ... [2023-02-15 10:32:08,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 10:32:08,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:32:08,343 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 10:32:08,345 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 10:32:08,373 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-02-15 10:32:08,373 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-02-15 10:32:08,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 10:32:08,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 10:32:08,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 10:32:08,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 10:32:08,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-15 10:32:08,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-15 10:32:08,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 10:32:08,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 10:32:08,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 10:32:08,449 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 10:32:08,451 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 10:32:08,484 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-02-15 10:32:08,572 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 10:32:08,576 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 10:32:08,576 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 10:32:08,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:32:08 BoogieIcfgContainer [2023-02-15 10:32:08,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 10:32:08,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 10:32:08,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 10:32:08,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 10:32:08,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 10:32:07" (1/3) ... [2023-02-15 10:32:08,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@120c5f03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:32:08, skipping insertion in model container [2023-02-15 10:32:08,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:32:08" (2/3) ... [2023-02-15 10:32:08,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@120c5f03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:32:08, skipping insertion in model container [2023-02-15 10:32:08,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:32:08" (3/3) ... [2023-02-15 10:32:08,583 INFO L112 eAbstractionObserver]: Analyzing ICFG simple-2.i [2023-02-15 10:32:08,595 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 10:32:08,596 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 10:32:08,634 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 10:32:08,638 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;@5c03a4c7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 10:32:08,638 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 10:32:08,641 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 20 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:32:08,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-15 10:32:08,646 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:32:08,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:32:08,647 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:32:08,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:32:08,650 INFO L85 PathProgramCache]: Analyzing trace with hash 2081441033, now seen corresponding path program 1 times [2023-02-15 10:32:08,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:32:08,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302474885] [2023-02-15 10:32:08,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:32:08,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:32:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:32:08,803 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 10:32:08,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:32:08,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302474885] [2023-02-15 10:32:08,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302474885] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:32:08,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:32:08,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 10:32:08,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44807835] [2023-02-15 10:32:08,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:32:08,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 10:32:08,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:32:08,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 10:32:08,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 10:32:08,846 INFO L87 Difference]: Start difference. First operand has 22 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 20 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 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 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 10:32:08,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:32:08,862 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2023-02-15 10:32:08,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 10:32:08,863 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2023-02-15 10:32:08,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:32:08,868 INFO L225 Difference]: With dead ends: 32 [2023-02-15 10:32:08,868 INFO L226 Difference]: Without dead ends: 14 [2023-02-15 10:32:08,870 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 10:32:08,874 INFO L413 NwaCegarLoop]: 25 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, 25 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 10:32:08,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:32:08,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-02-15 10:32:08,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-02-15 10:32:08,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:32:08,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-02-15 10:32:08,894 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2023-02-15 10:32:08,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:32:08,895 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-02-15 10:32:08,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 10:32:08,895 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-02-15 10:32:08,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 10:32:08,896 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:32:08,896 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:32:08,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 10:32:08,896 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:32:08,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:32:08,897 INFO L85 PathProgramCache]: Analyzing trace with hash -342474989, now seen corresponding path program 1 times [2023-02-15 10:32:08,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:32:08,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300796239] [2023-02-15 10:32:08,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:32:08,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:32:08,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:32:09,091 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 10:32:09,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:32:09,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300796239] [2023-02-15 10:32:09,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300796239] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:32:09,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:32:09,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 10:32:09,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6569456] [2023-02-15 10:32:09,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:32:09,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 10:32:09,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:32:09,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 10:32:09,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 10:32:09,095 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 10:32:09,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:32:09,156 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2023-02-15 10:32:09,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 10:32:09,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2023-02-15 10:32:09,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:32:09,157 INFO L225 Difference]: With dead ends: 29 [2023-02-15 10:32:09,157 INFO L226 Difference]: Without dead ends: 27 [2023-02-15 10:32:09,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-15 10:32:09,158 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:32:09,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 35 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:32:09,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-15 10:32:09,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2023-02-15 10:32:09,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 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 10:32:09,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-02-15 10:32:09,162 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 10 [2023-02-15 10:32:09,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:32:09,163 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-02-15 10:32:09,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 10:32:09,163 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-02-15 10:32:09,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 10:32:09,163 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:32:09,164 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:32:09,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 10:32:09,164 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:32:09,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:32:09,165 INFO L85 PathProgramCache]: Analyzing trace with hash -2120256963, now seen corresponding path program 1 times [2023-02-15 10:32:09,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:32:09,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953597573] [2023-02-15 10:32:09,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:32:09,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:32:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:32:09,368 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 10:32:09,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:32:09,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953597573] [2023-02-15 10:32:09,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953597573] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:32:09,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633037612] [2023-02-15 10:32:09,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:32:09,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:32:09,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:32:09,395 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 10:32:09,409 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 10:32:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:32:09,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 10:32:09,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:32:09,594 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 10:32:09,603 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 10:32:09,639 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 10:32:09,643 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 10:32:09,646 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 10:32:09,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:32:09,673 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 27 treesize of output 21 [2023-02-15 10:32:09,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:32:09,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:32:09,697 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 10:32:09,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633037612] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:32:09,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:32:09,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 8 [2023-02-15 10:32:09,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325205328] [2023-02-15 10:32:09,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:32:09,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 10:32:09,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:32:09,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 10:32:09,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-02-15 10:32:09,699 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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 10:32:09,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:32:09,744 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2023-02-15 10:32:09,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 10:32:09,744 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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 13 [2023-02-15 10:32:09,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:32:09,745 INFO L225 Difference]: With dead ends: 33 [2023-02-15 10:32:09,745 INFO L226 Difference]: Without dead ends: 23 [2023-02-15 10:32:09,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-02-15 10:32:09,746 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 39 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:32:09,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 37 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:32:09,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-15 10:32:09,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2023-02-15 10:32:09,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 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 10:32:09,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-02-15 10:32:09,749 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2023-02-15 10:32:09,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:32:09,749 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-02-15 10:32:09,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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 10:32:09,750 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-02-15 10:32:09,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-15 10:32:09,750 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:32:09,750 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:32:09,758 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 10:32:09,958 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 10:32:09,959 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:32:09,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:32:09,959 INFO L85 PathProgramCache]: Analyzing trace with hash -2147109766, now seen corresponding path program 1 times [2023-02-15 10:32:09,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:32:09,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107725152] [2023-02-15 10:32:09,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:32:09,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:32:09,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:32:10,151 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 10:32:10,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:32:10,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107725152] [2023-02-15 10:32:10,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107725152] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:32:10,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065130723] [2023-02-15 10:32:10,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:32:10,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:32:10,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:32:10,169 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 10:32:10,218 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 10:32:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:32:10,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-15 10:32:10,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:32:10,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-15 10:32:10,312 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 10:32:10,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-02-15 10:32:10,319 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 10:32:10,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:32:10,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 10:32:10,402 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 10:32:10,416 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 10:32:10,417 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 10:32:10,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:32:10,424 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_118 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_118) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) is different from false [2023-02-15 10:32:10,488 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:10,489 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 23 treesize of output 29 [2023-02-15 10:32:10,496 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:10,496 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 30 treesize of output 33 [2023-02-15 10:32:10,499 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 9 treesize of output 7 [2023-02-15 10:32:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-02-15 10:32:10,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065130723] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:32:10,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:32:10,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-02-15 10:32:10,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057705930] [2023-02-15 10:32:10,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:32:10,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 10:32:10,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:32:10,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 10:32:10,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=192, Unknown=1, NotChecked=28, Total=272 [2023-02-15 10:32:10,558 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 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) [2023-02-15 10:32:10,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:32:10,711 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2023-02-15 10:32:10,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 10:32:10,712 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 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) Word has length 14 [2023-02-15 10:32:10,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:32:10,712 INFO L225 Difference]: With dead ends: 23 [2023-02-15 10:32:10,712 INFO L226 Difference]: Without dead ends: 21 [2023-02-15 10:32:10,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=286, Unknown=1, NotChecked=36, Total=420 [2023-02-15 10:32:10,713 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 34 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 13 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:32:10,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 46 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 85 Invalid, 4 Unknown, 18 Unchecked, 0.1s Time] [2023-02-15 10:32:10,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-15 10:32:10,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2023-02-15 10:32:10,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 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 10:32:10,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-02-15 10:32:10,716 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2023-02-15 10:32:10,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:32:10,716 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-02-15 10:32:10,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 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) [2023-02-15 10:32:10,717 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-02-15 10:32:10,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 10:32:10,717 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:32:10,717 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:32:10,724 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 10:32:10,921 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 10:32:10,922 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:32:10,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:32:10,922 INFO L85 PathProgramCache]: Analyzing trace with hash 405712758, now seen corresponding path program 1 times [2023-02-15 10:32:10,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:32:10,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16174532] [2023-02-15 10:32:10,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:32:10,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:32:10,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:32:11,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:32:11,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:32:11,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16174532] [2023-02-15 10:32:11,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16174532] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:32:11,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324094692] [2023-02-15 10:32:11,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:32:11,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:32:11,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:32:11,357 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 10:32:11,359 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 10:32:11,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:32:11,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-15 10:32:11,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:32:11,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-15 10:32:11,453 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 10:32:11,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-02-15 10:32:11,480 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 10:32:11,488 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 10:32:11,528 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 10:32:11,529 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 48 [2023-02-15 10:32:11,533 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 10:32:11,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 23 [2023-02-15 10:32:11,580 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 27 treesize of output 15 [2023-02-15 10:32:11,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2023-02-15 10:32:11,600 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 10:32:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:32:11,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:32:11,634 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 452 treesize of output 408 [2023-02-15 10:32:11,767 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4)) (.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (and (forall ((v_ArrVal_178 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_178) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) |c_ULTIMATE.start_main_~p~0#1.base|)) (forall ((v_ArrVal_179 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_179) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) |c_ULTIMATE.start_main_~p~0#1.offset|)) (forall ((v_ArrVal_179 (Array Int Int))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_179) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))) (or (= .cse1 .cse2) (= .cse1 |c_ULTIMATE.start_main_~p~0#1.offset|)))) (or (forall ((v_ArrVal_179 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_179) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) .cse2))) (forall ((v_ArrVal_178 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_178) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) |c_ULTIMATE.start_main_~p~0#1.base|)))))) is different from false [2023-02-15 10:32:11,801 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:11,801 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 22 treesize of output 23 [2023-02-15 10:32:11,806 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:11,807 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 36 treesize of output 35 [2023-02-15 10:32:11,816 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 10:32:11,820 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-02-15 10:32:11,820 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2023-02-15 10:32:11,824 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-02-15 10:32:11,824 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 1 [2023-02-15 10:32:11,828 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-02-15 10:32:11,828 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 13 [2023-02-15 10:32:11,829 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:32:11,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 10 treesize of output 4 [2023-02-15 10:32:11,835 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-02-15 10:32:11,835 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 25 treesize of output 1 [2023-02-15 10:32:11,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-02-15 10:32:11,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324094692] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:32:11,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:32:11,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-02-15 10:32:11,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011865029] [2023-02-15 10:32:11,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:32:11,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 10:32:11,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:32:11,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 10:32:11,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=174, Unknown=1, NotChecked=26, Total=240 [2023-02-15 10:32:11,900 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 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) [2023-02-15 10:32:12,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:32:12,032 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2023-02-15 10:32:12,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 10:32:12,033 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 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) Word has length 17 [2023-02-15 10:32:12,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:32:12,033 INFO L225 Difference]: With dead ends: 33 [2023-02-15 10:32:12,033 INFO L226 Difference]: Without dead ends: 31 [2023-02-15 10:32:12,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=250, Unknown=1, NotChecked=32, Total=342 [2023-02-15 10:32:12,034 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 10 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:32:12,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 80 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 109 Invalid, 2 Unknown, 17 Unchecked, 0.1s Time] [2023-02-15 10:32:12,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-15 10:32:12,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2023-02-15 10:32:12,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 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 10:32:12,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2023-02-15 10:32:12,038 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 17 [2023-02-15 10:32:12,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:32:12,038 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-02-15 10:32:12,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 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) [2023-02-15 10:32:12,038 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2023-02-15 10:32:12,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 10:32:12,039 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:32:12,039 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:32:12,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-15 10:32:12,243 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 10:32:12,243 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:32:12,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:32:12,244 INFO L85 PathProgramCache]: Analyzing trace with hash 555614970, now seen corresponding path program 2 times [2023-02-15 10:32:12,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:32:12,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771735861] [2023-02-15 10:32:12,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:32:12,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:32:12,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:32:12,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:32:12,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:32:12,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771735861] [2023-02-15 10:32:12,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771735861] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:32:12,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237339359] [2023-02-15 10:32:12,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 10:32:12,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:32:12,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:32:12,571 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 10:32:12,573 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 10:32:12,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 10:32:12,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:32:12,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-15 10:32:12,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:32:12,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-15 10:32:12,679 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 10:32:12,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2023-02-15 10:32:12,696 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 10:32:12,701 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 10:32:12,730 INFO L321 Elim1Store]: treesize reduction 18, result has 21.7 percent of original size [2023-02-15 10:32:12,731 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2023-02-15 10:32:12,736 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 21 treesize of output 23 [2023-02-15 10:32:12,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2023-02-15 10:32:12,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2023-02-15 10:32:12,824 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:32:12,829 INFO L321 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2023-02-15 10:32:12,829 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 37 [2023-02-15 10:32:12,835 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-15 10:32:12,835 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2023-02-15 10:32:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:32:12,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:32:12,884 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:12,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 45 treesize of output 49 [2023-02-15 10:32:12,888 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:12,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 40 treesize of output 39 [2023-02-15 10:32:12,895 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:12,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 45 treesize of output 44 [2023-02-15 10:32:12,900 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:12,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 35 treesize of output 39 [2023-02-15 10:32:12,908 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse0 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4))) (and (forall ((v_arrayElimArr_10 (Array Int Int)) (v_arrayElimArr_9 (Array Int Int))) (or (not (= (select v_arrayElimArr_9 .cse0) 0)) (not (= (select v_arrayElimArr_10 .cse0) 0)) (= (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_arrayElimArr_9))) (select .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|) .cse2))) (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_arrayElimArr_10) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2) 4)) 0))) (forall ((v_arrayElimArr_8 (Array Int Int)) (v_arrayElimArr_7 (Array Int Int))) (or (= (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_arrayElimArr_8))) (select (select .cse3 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_arrayElimArr_7) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2)) (+ (select (select .cse3 |c_ULTIMATE.start_main_~a~0#1.base|) .cse2) 4))) 0) (not (= (select v_arrayElimArr_8 .cse0) 0)) (not (= (select v_arrayElimArr_7 .cse0) 0)))))) is different from false [2023-02-15 10:32:12,938 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:12,939 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 60 treesize of output 61 [2023-02-15 10:32:12,943 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:12,943 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 50 treesize of output 41 [2023-02-15 10:32:12,952 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:12,952 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 72 treesize of output 71 [2023-02-15 10:32:13,111 INFO L321 Elim1Store]: treesize reduction 42, result has 82.1 percent of original size [2023-02-15 10:32:13,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 208 treesize of output 335 [2023-02-15 10:32:13,126 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:13,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 181 treesize of output 145 [2023-02-15 10:32:13,161 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:13,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 214 treesize of output 228 [2023-02-15 10:32:20,959 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:20,960 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 60 treesize of output 61 [2023-02-15 10:32:20,965 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:20,965 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 50 treesize of output 41 [2023-02-15 10:32:21,007 INFO L321 Elim1Store]: treesize reduction 84, result has 25.0 percent of original size [2023-02-15 10:32:21,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 111 [2023-02-15 10:32:21,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:32:21,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 43 treesize of output 37 [2023-02-15 10:32:21,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:32:21,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:32:21,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 67 [2023-02-15 10:32:21,027 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 8 treesize of output 4 [2023-02-15 10:32:21,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-02-15 10:32:21,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237339359] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:32:21,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:32:21,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-02-15 10:32:21,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353146691] [2023-02-15 10:32:21,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:32:21,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 10:32:21,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:32:21,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 10:32:21,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=200, Unknown=1, NotChecked=28, Total=272 [2023-02-15 10:32:21,197 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 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 10:32:21,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:32:21,405 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2023-02-15 10:32:21,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 10:32:21,406 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 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 [2023-02-15 10:32:21,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:32:21,406 INFO L225 Difference]: With dead ends: 38 [2023-02-15 10:32:21,406 INFO L226 Difference]: Without dead ends: 25 [2023-02-15 10:32:21,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=344, Unknown=1, NotChecked=38, Total=462 [2023-02-15 10:32:21,408 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:32:21,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 97 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 140 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2023-02-15 10:32:21,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-15 10:32:21,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2023-02-15 10:32:21,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 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) [2023-02-15 10:32:21,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-02-15 10:32:21,410 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2023-02-15 10:32:21,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:32:21,410 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-02-15 10:32:21,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 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 10:32:21,410 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-02-15 10:32:21,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 10:32:21,411 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:32:21,411 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:32:21,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 10:32:21,615 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 10:32:21,616 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:32:21,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:32:21,616 INFO L85 PathProgramCache]: Analyzing trace with hash 771401775, now seen corresponding path program 3 times [2023-02-15 10:32:21,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:32:21,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601424254] [2023-02-15 10:32:21,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:32:21,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:32:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:32:22,041 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:32:22,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:32:22,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601424254] [2023-02-15 10:32:22,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601424254] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:32:22,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746789375] [2023-02-15 10:32:22,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 10:32:22,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:32:22,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:32:22,043 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 10:32:22,045 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 10:32:22,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 10:32:22,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:32:22,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-15 10:32:22,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:32:22,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-15 10:32:22,152 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 10:32:22,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 10:32:22,178 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 10:32:22,185 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 10:32:22,219 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-02-15 10:32:22,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 10:32:22,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 10:32:22,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 10:32:22,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 10:32:22,290 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-02-15 10:32:22,290 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 62 [2023-02-15 10:32:22,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2023-02-15 10:32:22,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:32:22,301 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 27 treesize of output 22 [2023-02-15 10:32:22,356 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2023-02-15 10:32:22,357 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 74 [2023-02-15 10:32:22,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:32:22,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-02-15 10:32:22,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-02-15 10:32:22,407 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 10:32:22,407 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 33 [2023-02-15 10:32:22,412 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 22 treesize of output 10 [2023-02-15 10:32:22,420 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 10:32:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:32:22,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:32:22,449 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_348 (Array Int Int)) (v_ArrVal_349 (Array Int Int)) (v_ArrVal_352 (Array Int Int))) (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_352) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_348) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0)) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_349) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))) 1)) is different from false [2023-02-15 10:32:22,527 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:22,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 57 treesize of output 61 [2023-02-15 10:32:22,535 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:22,535 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 70 [2023-02-15 10:32:22,543 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:22,543 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 128 treesize of output 131 [2023-02-15 10:32:22,547 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:22,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 99 treesize of output 97 [2023-02-15 10:32:22,557 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 45 treesize of output 27 [2023-02-15 10:32:22,576 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 8 treesize of output 4 [2023-02-15 10:32:22,582 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 8 treesize of output 4 [2023-02-15 10:32:22,586 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 30 treesize of output 22 [2023-02-15 10:32:22,653 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:22,653 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 29 treesize of output 30 [2023-02-15 10:32:22,660 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:22,660 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 164 treesize of output 157 [2023-02-15 10:32:22,663 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 142 treesize of output 126 [2023-02-15 10:32:22,668 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:22,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 136 treesize of output 108 [2023-02-15 10:32:22,794 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:22,794 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 25 treesize of output 26 [2023-02-15 10:32:22,796 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:32:22,805 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:22,805 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 36 treesize of output 35 [2023-02-15 10:32:22,817 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:22,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 20 treesize of output 20 [2023-02-15 10:32:22,825 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:22,825 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 34 treesize of output 35 [2023-02-15 10:32:22,827 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:32:22,831 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:22,831 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 47 treesize of output 46 [2023-02-15 10:32:22,837 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:22,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 41 treesize of output 33 [2023-02-15 10:32:23,018 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-02-15 10:32:23,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746789375] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:32:23,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 10:32:23,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-02-15 10:32:23,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391493904] [2023-02-15 10:32:23,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 10:32:23,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 10:32:23,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:32:23,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 10:32:23,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=347, Unknown=9, NotChecked=38, Total=462 [2023-02-15 10:32:23,019 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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 10:32:23,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:32:23,435 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2023-02-15 10:32:23,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 10:32:23,436 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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 21 [2023-02-15 10:32:23,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:32:23,436 INFO L225 Difference]: With dead ends: 38 [2023-02-15 10:32:23,436 INFO L226 Difference]: Without dead ends: 36 [2023-02-15 10:32:23,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=669, Unknown=9, NotChecked=54, Total=870 [2023-02-15 10:32:23,437 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 47 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 10:32:23,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 83 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 183 Invalid, 1 Unknown, 30 Unchecked, 0.2s Time] [2023-02-15 10:32:23,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-15 10:32:23,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2023-02-15 10:32:23,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 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 10:32:23,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-02-15 10:32:23,441 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2023-02-15 10:32:23,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:32:23,441 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-02-15 10:32:23,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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 10:32:23,441 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-02-15 10:32:23,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 10:32:23,442 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:32:23,442 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:32:23,449 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 10:32:23,646 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 10:32:23,646 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:32:23,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:32:23,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1534909535, now seen corresponding path program 4 times [2023-02-15 10:32:23,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:32:23,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059541507] [2023-02-15 10:32:23,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:32:23,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:32:23,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:32:24,186 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:32:24,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:32:24,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059541507] [2023-02-15 10:32:24,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059541507] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 10:32:24,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442571192] [2023-02-15 10:32:24,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 10:32:24,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:32:24,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:32:24,188 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 10:32:24,191 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 10:32:24,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 10:32:24,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:32:24,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-15 10:32:24,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:32:24,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-15 10:32:24,298 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-15 10:32:24,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-15 10:32:24,333 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 10:32:24,336 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 10:32:24,376 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 10:32:24,377 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 14 treesize of output 20 [2023-02-15 10:32:24,380 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 5 treesize of output 3 [2023-02-15 10:32:24,390 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-02-15 10:32:24,390 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 31 treesize of output 29 [2023-02-15 10:32:24,402 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2023-02-15 10:32:24,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 20 treesize of output 22 [2023-02-15 10:32:24,450 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2023-02-15 10:32:24,451 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 75 [2023-02-15 10:32:24,453 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 82 [2023-02-15 10:32:24,514 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2023-02-15 10:32:24,514 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 178 treesize of output 149 [2023-02-15 10:32:24,527 INFO L321 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2023-02-15 10:32:24,527 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 150 treesize of output 132 [2023-02-15 10:32:24,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:32:24,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 73 [2023-02-15 10:32:24,629 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-02-15 10:32:24,630 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 62 [2023-02-15 10:32:24,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2023-02-15 10:32:24,644 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 10:32:24,646 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:32:24,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:32:24,700 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 451 treesize of output 393 [2023-02-15 10:32:24,732 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (and (forall ((v_ArrVal_447 (Array Int Int)) (v_ArrVal_448 (Array Int Int))) (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_447)) (.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_448))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) .cse4)) (.cse2 (+ (select (select .cse3 |c_ULTIMATE.start_main_~a~0#1.base|) .cse4) 4))) (or (not (= (select (select .cse0 .cse1) .cse2) |c_ULTIMATE.start_main_~p~0#1.base|)) (not (= (select (select .cse3 .cse1) .cse2) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4))))))) (forall ((v_ArrVal_447 (Array Int Int)) (v_ArrVal_448 (Array Int Int))) (= (let ((.cse5 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_447))) (select (select .cse5 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_448) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4)) (+ (select (select .cse5 |c_ULTIMATE.start_main_~a~0#1.base|) .cse4) 4))) |c_ULTIMATE.start_main_~p~0#1.offset|)) (forall ((v_ArrVal_447 (Array Int Int)) (v_ArrVal_448 (Array Int Int))) (= (select (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_448))) (select .cse6 (select (select .cse6 |c_ULTIMATE.start_main_~a~0#1.base|) .cse4))) (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_447) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4) 4)) |c_ULTIMATE.start_main_~p~0#1.base|)))) is different from false [2023-02-15 10:32:24,888 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:24,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 109 treesize of output 103 [2023-02-15 10:32:24,893 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:24,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 122 treesize of output 116 [2023-02-15 10:32:25,005 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:25,005 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 81 treesize of output 82 [2023-02-15 10:32:25,011 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:25,011 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 71 treesize of output 62 [2023-02-15 10:32:25,065 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:25,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 1188 treesize of output 931 [2023-02-15 10:32:25,085 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:25,086 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 5508 treesize of output 5153 [2023-02-15 10:32:25,103 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:25,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5148 treesize of output 3664 [2023-02-15 10:32:25,112 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 3650 treesize of output 3170 [2023-02-15 10:32:25,203 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:25,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 2784 treesize of output 2844 [2023-02-15 10:32:25,291 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:32:25,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 2790 treesize of output 2778