./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array4_pattern.c --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/array-patterns/array4_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 09:48:21,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 09:48:21,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 09:48:21,509 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 09:48:21,510 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 09:48:21,510 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 09:48:21,511 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 09:48:21,512 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 09:48:21,513 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 09:48:21,514 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 09:48:21,514 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 09:48:21,515 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 09:48:21,515 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 09:48:21,516 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 09:48:21,517 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 09:48:21,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 09:48:21,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 09:48:21,534 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 09:48:21,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 09:48:21,536 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 09:48:21,537 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 09:48:21,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 09:48:21,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 09:48:21,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 09:48:21,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 09:48:21,541 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 09:48:21,541 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 09:48:21,542 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 09:48:21,542 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 09:48:21,543 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 09:48:21,543 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 09:48:21,543 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 09:48:21,544 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 09:48:21,544 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 09:48:21,545 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 09:48:21,545 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 09:48:21,545 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 09:48:21,546 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 09:48:21,546 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 09:48:21,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 09:48:21,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 09:48:21,553 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 09:48:21,575 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 09:48:21,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 09:48:21,576 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 09:48:21,576 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 09:48:21,577 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 09:48:21,577 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 09:48:21,578 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 09:48:21,578 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 09:48:21,578 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 09:48:21,578 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 09:48:21,579 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 09:48:21,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 09:48:21,579 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 09:48:21,579 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 09:48:21,579 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 09:48:21,579 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 09:48:21,579 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 09:48:21,580 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 09:48:21,580 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 09:48:21,580 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 09:48:21,580 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 09:48:21,580 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 09:48:21,580 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 09:48:21,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 09:48:21,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 09:48:21,581 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 09:48:21,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 09:48:21,581 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 09:48:21,581 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 09:48:21,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 09:48:21,581 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 09:48:21,581 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 09:48:21,582 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 09:48:21,582 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 09:48:21,582 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 09:48:21,582 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 [2023-02-15 09:48:21,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 09:48:21,776 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 09:48:21,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 09:48:21,779 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 09:48:21,779 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 09:48:21,780 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array4_pattern.c [2023-02-15 09:48:22,778 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 09:48:23,001 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 09:48:23,001 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array4_pattern.c [2023-02-15 09:48:23,006 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55a8825be/1c6bb27d7b074d03810929d8f7ebf0d4/FLAG4efcf704e [2023-02-15 09:48:23,335 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55a8825be/1c6bb27d7b074d03810929d8f7ebf0d4 [2023-02-15 09:48:23,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 09:48:23,338 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 09:48:23,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 09:48:23,339 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 09:48:23,342 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 09:48:23,342 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:48:23" (1/1) ... [2023-02-15 09:48:23,343 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68983e99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:48:23, skipping insertion in model container [2023-02-15 09:48:23,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:48:23" (1/1) ... [2023-02-15 09:48:23,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 09:48:23,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 09:48:23,465 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2023-02-15 09:48:23,489 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 09:48:23,501 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 09:48:23,511 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2023-02-15 09:48:23,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 09:48:23,538 INFO L208 MainTranslator]: Completed translation [2023-02-15 09:48:23,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:48:23 WrapperNode [2023-02-15 09:48:23,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 09:48:23,542 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 09:48:23,542 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 09:48:23,542 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 09:48:23,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:48:23" (1/1) ... [2023-02-15 09:48:23,562 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:48:23" (1/1) ... [2023-02-15 09:48:23,581 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 93 [2023-02-15 09:48:23,582 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 09:48:23,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 09:48:23,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 09:48:23,583 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 09:48:23,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:48:23" (1/1) ... [2023-02-15 09:48:23,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:48:23" (1/1) ... [2023-02-15 09:48:23,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:48:23" (1/1) ... [2023-02-15 09:48:23,592 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:48:23" (1/1) ... [2023-02-15 09:48:23,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:48:23" (1/1) ... [2023-02-15 09:48:23,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:48:23" (1/1) ... [2023-02-15 09:48:23,606 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:48:23" (1/1) ... [2023-02-15 09:48:23,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:48:23" (1/1) ... [2023-02-15 09:48:23,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 09:48:23,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 09:48:23,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 09:48:23,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 09:48:23,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:48:23" (1/1) ... [2023-02-15 09:48:23,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 09:48:23,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:48:23,637 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 09:48:23,656 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 09:48:23,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 09:48:23,681 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-15 09:48:23,681 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-15 09:48:23,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 09:48:23,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 09:48:23,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 09:48:23,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 09:48:23,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 09:48:23,682 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 09:48:23,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 09:48:23,731 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 09:48:23,732 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 09:48:23,855 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 09:48:23,859 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 09:48:23,859 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 09:48:23,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:48:23 BoogieIcfgContainer [2023-02-15 09:48:23,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 09:48:23,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 09:48:23,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 09:48:23,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 09:48:23,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 09:48:23" (1/3) ... [2023-02-15 09:48:23,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22303425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:48:23, skipping insertion in model container [2023-02-15 09:48:23,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:48:23" (2/3) ... [2023-02-15 09:48:23,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22303425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:48:23, skipping insertion in model container [2023-02-15 09:48:23,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:48:23" (3/3) ... [2023-02-15 09:48:23,866 INFO L112 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2023-02-15 09:48:23,876 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 09:48:23,876 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 09:48:23,905 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 09:48:23,909 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;@6bbf502d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 09:48:23,909 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 09:48:23,911 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 09:48:23,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 09:48:23,916 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:48:23,917 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:48:23,917 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:48:23,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:48:23,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1359011546, now seen corresponding path program 1 times [2023-02-15 09:48:23,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:48:23,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351517491] [2023-02-15 09:48:23,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:48:23,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:48:23,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:48:24,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 09:48:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:48:24,037 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 09:48:24,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:48:24,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351517491] [2023-02-15 09:48:24,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351517491] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:48:24,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:48:24,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 09:48:24,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497102799] [2023-02-15 09:48:24,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:48:24,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 09:48:24,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:48:24,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 09:48:24,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 09:48:24,071 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 09:48:24,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:48:24,085 INFO L93 Difference]: Finished difference Result 63 states and 93 transitions. [2023-02-15 09:48:24,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 09:48:24,087 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-02-15 09:48:24,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:48:24,091 INFO L225 Difference]: With dead ends: 63 [2023-02-15 09:48:24,091 INFO L226 Difference]: Without dead ends: 29 [2023-02-15 09:48:24,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 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 09:48:24,095 INFO L413 NwaCegarLoop]: 40 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, 40 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 09:48:24,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:48:24,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-15 09:48:24,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-15 09:48:24,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 09:48:24,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2023-02-15 09:48:24,118 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 16 [2023-02-15 09:48:24,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:48:24,119 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2023-02-15 09:48:24,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 09:48:24,119 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2023-02-15 09:48:24,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-15 09:48:24,121 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:48:24,121 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:48:24,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 09:48:24,121 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:48:24,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:48:24,122 INFO L85 PathProgramCache]: Analyzing trace with hash -852430543, now seen corresponding path program 1 times [2023-02-15 09:48:24,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:48:24,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202286627] [2023-02-15 09:48:24,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:48:24,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:48:24,152 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:48:24,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [299139344] [2023-02-15 09:48:24,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:48:24,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:48:24,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:48:24,174 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 09:48:24,175 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 09:48:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:48:24,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 09:48:24,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:48:24,388 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 09:48:24,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 09:48:24,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:48:24,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202286627] [2023-02-15 09:48:24,389 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:48:24,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299139344] [2023-02-15 09:48:24,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299139344] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:48:24,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:48:24,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 09:48:24,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192123879] [2023-02-15 09:48:24,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:48:24,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 09:48:24,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:48:24,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 09:48:24,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 09:48:24,400 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 09:48:24,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:48:24,492 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2023-02-15 09:48:24,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 09:48:24,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2023-02-15 09:48:24,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:48:24,493 INFO L225 Difference]: With dead ends: 70 [2023-02-15 09:48:24,494 INFO L226 Difference]: Without dead ends: 48 [2023-02-15 09:48:24,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 09:48:24,495 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:48:24,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 53 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:48:24,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-15 09:48:24,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2023-02-15 09:48:24,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 09:48:24,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2023-02-15 09:48:24,501 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 42 [2023-02-15 09:48:24,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:48:24,502 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2023-02-15 09:48:24,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 09:48:24,503 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2023-02-15 09:48:24,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-15 09:48:24,503 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:48:24,504 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:48:24,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 09:48:24,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:48:24,708 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:48:24,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:48:24,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1661777169, now seen corresponding path program 1 times [2023-02-15 09:48:24,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:48:24,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748249528] [2023-02-15 09:48:24,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:48:24,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:48:24,735 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:48:24,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154723426] [2023-02-15 09:48:24,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:48:24,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:48:24,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:48:24,737 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 09:48:24,739 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 09:48:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:48:24,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 09:48:24,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:48:24,848 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 09:48:24,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 09:48:24,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:48:24,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748249528] [2023-02-15 09:48:24,849 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:48:24,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154723426] [2023-02-15 09:48:24,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154723426] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:48:24,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:48:24,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 09:48:24,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882785873] [2023-02-15 09:48:24,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:48:24,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 09:48:24,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:48:24,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 09:48:24,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 09:48:24,853 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 09:48:24,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:48:24,869 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2023-02-15 09:48:24,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 09:48:24,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2023-02-15 09:48:24,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:48:24,870 INFO L225 Difference]: With dead ends: 43 [2023-02-15 09:48:24,870 INFO L226 Difference]: Without dead ends: 39 [2023-02-15 09:48:24,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 09:48:24,871 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:48:24,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 81 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:48:24,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-02-15 09:48:24,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-02-15 09:48:24,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 09:48:24,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2023-02-15 09:48:24,877 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 42 [2023-02-15 09:48:24,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:48:24,877 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2023-02-15 09:48:24,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 09:48:24,878 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2023-02-15 09:48:24,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 09:48:24,879 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:48:24,879 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:48:24,895 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 09:48:25,084 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,SelfDestructingSolverStorable2 [2023-02-15 09:48:25,085 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:48:25,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:48:25,085 INFO L85 PathProgramCache]: Analyzing trace with hash 813208561, now seen corresponding path program 1 times [2023-02-15 09:48:25,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:48:25,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22788737] [2023-02-15 09:48:25,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:48:25,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:48:25,127 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:48:25,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1594364191] [2023-02-15 09:48:25,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:48:25,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:48:25,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:48:25,146 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 09:48:25,165 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 09:48:25,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:48:25,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 09:48:25,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:48:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 09:48:25,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 09:48:25,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:48:25,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22788737] [2023-02-15 09:48:25,289 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:48:25,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594364191] [2023-02-15 09:48:25,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594364191] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:48:25,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:48:25,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 09:48:25,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496210656] [2023-02-15 09:48:25,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:48:25,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 09:48:25,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:48:25,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 09:48:25,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 09:48:25,293 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 09:48:25,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:48:25,373 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2023-02-15 09:48:25,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 09:48:25,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2023-02-15 09:48:25,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:48:25,375 INFO L225 Difference]: With dead ends: 77 [2023-02-15 09:48:25,375 INFO L226 Difference]: Without dead ends: 43 [2023-02-15 09:48:25,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-15 09:48:25,378 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:48:25,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 102 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:48:25,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-15 09:48:25,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2023-02-15 09:48:25,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 09:48:25,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2023-02-15 09:48:25,398 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 44 [2023-02-15 09:48:25,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:48:25,399 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2023-02-15 09:48:25,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 09:48:25,399 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2023-02-15 09:48:25,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 09:48:25,402 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:48:25,402 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:48:25,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 09:48:25,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:48:25,607 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:48:25,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:48:25,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1843316237, now seen corresponding path program 1 times [2023-02-15 09:48:25,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:48:25,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646829520] [2023-02-15 09:48:25,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:48:25,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:48:25,636 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:48:25,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [914302844] [2023-02-15 09:48:25,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:48:25,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:48:25,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:48:25,658 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 09:48:25,661 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 09:48:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:48:25,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-15 09:48:25,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:48:25,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 09:48:25,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:48:25,792 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 18 [2023-02-15 09:48:25,796 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 09:48:26,338 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:48:26,339 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 47 treesize of output 28 [2023-02-15 09:48:26,478 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:48:26,482 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-02-15 09:48:26,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 17 [2023-02-15 09:48:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 09:48:26,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:48:41,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:48:41,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646829520] [2023-02-15 09:48:41,051 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:48:41,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914302844] [2023-02-15 09:48:41,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914302844] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:48:41,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 09:48:41,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-15 09:48:41,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081334160] [2023-02-15 09:48:41,051 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 09:48:41,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 09:48:41,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:48:41,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 09:48:41,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=455, Unknown=5, NotChecked=0, Total=552 [2023-02-15 09:48:41,055 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 17 states have internal predecessors, (30), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-15 09:48:45,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 09:48:46,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 09:48:49,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 09:48:51,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-15 09:48:51,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:48:51,040 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2023-02-15 09:48:51,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 09:48:51,042 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 17 states have internal predecessors, (30), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 46 [2023-02-15 09:48:51,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:48:51,043 INFO L225 Difference]: With dead ends: 83 [2023-02-15 09:48:51,043 INFO L226 Difference]: Without dead ends: 79 [2023-02-15 09:48:51,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=237, Invalid=1239, Unknown=6, NotChecked=0, Total=1482 [2023-02-15 09:48:51,044 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 94 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 58 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2023-02-15 09:48:51,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 187 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 502 Invalid, 4 Unknown, 0 Unchecked, 7.7s Time] [2023-02-15 09:48:51,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-15 09:48:51,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2023-02-15 09:48:51,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 states have internal predecessors, (57), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 09:48:51,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2023-02-15 09:48:51,056 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 46 [2023-02-15 09:48:51,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:48:51,064 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2023-02-15 09:48:51,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 17 states have internal predecessors, (30), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-15 09:48:51,065 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2023-02-15 09:48:51,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 09:48:51,066 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:48:51,066 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:48:51,075 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 09:48:51,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:48:51,267 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:48:51,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:48:51,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1847143947, now seen corresponding path program 2 times [2023-02-15 09:48:51,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:48:51,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121901881] [2023-02-15 09:48:51,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:48:51,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:48:51,291 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:48:51,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598246723] [2023-02-15 09:48:51,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:48:51,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:48:51,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:48:51,310 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 09:48:51,333 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 09:48:51,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:48:51,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:48:51,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 09:48:51,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:48:51,464 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 09:48:51,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:48:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 09:48:51,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:48:51,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121901881] [2023-02-15 09:48:51,532 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:48:51,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598246723] [2023-02-15 09:48:51,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598246723] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:48:51,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:48:51,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-15 09:48:51,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699494370] [2023-02-15 09:48:51,532 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:48:51,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 09:48:51,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:48:51,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 09:48:51,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-15 09:48:51,534 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 09:48:51,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:48:51,684 INFO L93 Difference]: Finished difference Result 150 states and 186 transitions. [2023-02-15 09:48:51,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 09:48:51,684 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 48 [2023-02-15 09:48:51,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:48:51,685 INFO L225 Difference]: With dead ends: 150 [2023-02-15 09:48:51,685 INFO L226 Difference]: Without dead ends: 123 [2023-02-15 09:48:51,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-02-15 09:48:51,686 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 76 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:48:51,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 185 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:48:51,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-02-15 09:48:51,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 105. [2023-02-15 09:48:51,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 74 states have (on average 1.1216216216216217) internal successors, (83), 75 states have internal predecessors, (83), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2023-02-15 09:48:51,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 133 transitions. [2023-02-15 09:48:51,700 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 133 transitions. Word has length 48 [2023-02-15 09:48:51,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:48:51,700 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 133 transitions. [2023-02-15 09:48:51,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 09:48:51,701 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 133 transitions. [2023-02-15 09:48:51,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 09:48:51,701 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:48:51,702 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:48:51,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-15 09:48:51,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:48:51,907 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:48:51,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:48:51,907 INFO L85 PathProgramCache]: Analyzing trace with hash 741894005, now seen corresponding path program 3 times [2023-02-15 09:48:51,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:48:51,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683605610] [2023-02-15 09:48:51,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:48:51,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:48:51,923 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:48:51,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [387073859] [2023-02-15 09:48:51,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:48:51,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:48:51,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:48:51,925 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 09:48:51,927 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 09:48:51,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-15 09:48:51,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:48:51,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-15 09:48:51,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:48:51,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 09:48:52,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:48:52,200 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 0 case distinctions, treesize of input 27 treesize of output 31 [2023-02-15 09:48:52,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2023-02-15 09:48:52,208 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 09:48:52,217 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 13 [2023-02-15 09:48:52,337 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 09:48:52,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 38 [2023-02-15 09:48:52,422 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-15 09:48:52,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:48:52,569 INFO L321 Elim1Store]: treesize reduction 20, result has 64.3 percent of original size [2023-02-15 09:48:52,569 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 110 treesize of output 111 [2023-02-15 09:48:52,588 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 09:48:52,588 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 155 treesize of output 155 [2023-02-15 09:48:52,602 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 09:48:52,602 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 157 treesize of output 156 [2023-02-15 09:48:52,634 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 09:48:52,635 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 149 treesize of output 147 [2023-02-15 09:48:52,804 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 35 treesize of output 33 [2023-02-15 09:48:53,256 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-15 09:48:53,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:48:53,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683605610] [2023-02-15 09:48:53,257 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:48:53,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387073859] [2023-02-15 09:48:53,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387073859] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:48:53,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:48:53,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 28 [2023-02-15 09:48:53,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181531504] [2023-02-15 09:48:53,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:48:53,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-15 09:48:53,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:48:53,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-15 09:48:53,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2023-02-15 09:48:53,259 INFO L87 Difference]: Start difference. First operand 105 states and 133 transitions. Second operand has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 7 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2023-02-15 09:48:56,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:48:56,697 INFO L93 Difference]: Finished difference Result 134 states and 169 transitions. [2023-02-15 09:48:56,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-02-15 09:48:56,698 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 7 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 48 [2023-02-15 09:48:56,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:48:56,699 INFO L225 Difference]: With dead ends: 134 [2023-02-15 09:48:56,700 INFO L226 Difference]: Without dead ends: 75 [2023-02-15 09:48:56,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1590 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1025, Invalid=4525, Unknown=0, NotChecked=0, Total=5550 [2023-02-15 09:48:56,702 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 299 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 280 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-15 09:48:56,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 297 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 908 Invalid, 1 Unknown, 0 Unchecked, 1.4s Time] [2023-02-15 09:48:56,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-15 09:48:56,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2023-02-15 09:48:56,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 45 states have internal predecessors, (49), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 09:48:56,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2023-02-15 09:48:56,710 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 48 [2023-02-15 09:48:56,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:48:56,710 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2023-02-15 09:48:56,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 7 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2023-02-15 09:48:56,711 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2023-02-15 09:48:56,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 09:48:56,711 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:48:56,711 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:48:56,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 09:48:56,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:48:56,932 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:48:56,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:48:56,932 INFO L85 PathProgramCache]: Analyzing trace with hash 48801527, now seen corresponding path program 4 times [2023-02-15 09:48:56,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:48:56,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602427838] [2023-02-15 09:48:56,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:48:56,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:48:56,946 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:48:56,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476441256] [2023-02-15 09:48:56,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 09:48:56,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:48:56,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:48:56,948 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:48:56,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 09:48:57,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 09:48:57,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:48:57,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 87 conjunts are in the unsatisfiable core [2023-02-15 09:48:57,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:48:57,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 09:48:57,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:48:57,051 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 0 case distinctions, treesize of input 27 treesize of output 31 [2023-02-15 09:48:57,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2023-02-15 09:48:57,058 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 09:48:57,062 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 09:48:57,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2023-02-15 09:48:58,031 INFO L321 Elim1Store]: treesize reduction 64, result has 47.1 percent of original size [2023-02-15 09:48:58,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 93 [2023-02-15 09:48:58,407 INFO L321 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2023-02-15 09:48:58,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 48 [2023-02-15 09:48:58,480 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 09:48:58,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:48:59,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:48:59,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602427838] [2023-02-15 09:48:59,739 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:48:59,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476441256] [2023-02-15 09:48:59,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476441256] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:48:59,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 09:48:59,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-02-15 09:48:59,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684082369] [2023-02-15 09:48:59,740 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 09:48:59,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 09:48:59,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:48:59,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 09:48:59,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 09:48:59,742 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand has 23 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 09:49:00,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:49:00,533 INFO L93 Difference]: Finished difference Result 136 states and 171 transitions. [2023-02-15 09:49:00,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 09:49:00,534 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 50 [2023-02-15 09:49:00,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:49:00,535 INFO L225 Difference]: With dead ends: 136 [2023-02-15 09:49:00,535 INFO L226 Difference]: Without dead ends: 98 [2023-02-15 09:49:00,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=270, Invalid=1370, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 09:49:00,536 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 39 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 09:49:00,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 266 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 09:49:00,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-02-15 09:49:00,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2023-02-15 09:49:00,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 61 states have internal predecessors, (67), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2023-02-15 09:49:00,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2023-02-15 09:49:00,559 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 50 [2023-02-15 09:49:00,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:49:00,560 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2023-02-15 09:49:00,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 09:49:00,560 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2023-02-15 09:49:00,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 09:49:00,561 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:49:00,561 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:49:00,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 09:49:00,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:49:00,766 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:49:00,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:49:00,766 INFO L85 PathProgramCache]: Analyzing trace with hash -293138951, now seen corresponding path program 5 times [2023-02-15 09:49:00,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:49:00,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666493612] [2023-02-15 09:49:00,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:49:00,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:49:00,791 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:49:00,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [322525069] [2023-02-15 09:49:00,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 09:49:00,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:49:00,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:49:00,817 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:49:00,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 09:49:00,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-02-15 09:49:00,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:49:00,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 09:49:00,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:49:00,958 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 09:49:00,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:49:01,015 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 09:49:01,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:49:01,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666493612] [2023-02-15 09:49:01,015 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:49:01,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322525069] [2023-02-15 09:49:01,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322525069] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:49:01,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:49:01,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-02-15 09:49:01,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753380371] [2023-02-15 09:49:01,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:49:01,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 09:49:01,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:49:01,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 09:49:01,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-15 09:49:01,017 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 09:49:01,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:49:01,214 INFO L93 Difference]: Finished difference Result 202 states and 257 transitions. [2023-02-15 09:49:01,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 09:49:01,215 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 52 [2023-02-15 09:49:01,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:49:01,218 INFO L225 Difference]: With dead ends: 202 [2023-02-15 09:49:01,218 INFO L226 Difference]: Without dead ends: 160 [2023-02-15 09:49:01,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-02-15 09:49:01,222 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 114 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 09:49:01,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 222 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 09:49:01,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-02-15 09:49:01,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 133. [2023-02-15 09:49:01,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 94 states have (on average 1.1170212765957446) internal successors, (105), 95 states have internal predecessors, (105), 33 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-15 09:49:01,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 171 transitions. [2023-02-15 09:49:01,260 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 171 transitions. Word has length 52 [2023-02-15 09:49:01,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:49:01,261 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 171 transitions. [2023-02-15 09:49:01,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 09:49:01,261 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 171 transitions. [2023-02-15 09:49:01,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 09:49:01,261 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:49:01,262 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:49:01,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-15 09:49:01,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-02-15 09:49:01,468 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:49:01,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:49:01,469 INFO L85 PathProgramCache]: Analyzing trace with hash 986268537, now seen corresponding path program 6 times [2023-02-15 09:49:01,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:49:01,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381132430] [2023-02-15 09:49:01,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:49:01,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:49:01,481 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:49:01,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083590948] [2023-02-15 09:49:01,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 09:49:01,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:49:01,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:49:01,482 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:49:01,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 09:49:01,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-02-15 09:49:01,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:49:01,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 09:49:01,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:49:01,665 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 09:49:01,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:49:01,730 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 09:49:01,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:49:01,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381132430] [2023-02-15 09:49:01,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:49:01,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083590948] [2023-02-15 09:49:01,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083590948] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:49:01,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:49:01,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-02-15 09:49:01,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315185085] [2023-02-15 09:49:01,730 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:49:01,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 09:49:01,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:49:01,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 09:49:01,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-15 09:49:01,731 INFO L87 Difference]: Start difference. First operand 133 states and 171 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 09:49:01,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:49:01,965 INFO L93 Difference]: Finished difference Result 148 states and 185 transitions. [2023-02-15 09:49:01,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 09:49:01,965 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 52 [2023-02-15 09:49:01,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:49:01,966 INFO L225 Difference]: With dead ends: 148 [2023-02-15 09:49:01,966 INFO L226 Difference]: Without dead ends: 144 [2023-02-15 09:49:01,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-02-15 09:49:01,967 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 78 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 09:49:01,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 243 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 09:49:01,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-02-15 09:49:01,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 135. [2023-02-15 09:49:01,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 96 states have (on average 1.1145833333333333) internal successors, (107), 97 states have internal predecessors, (107), 33 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-15 09:49:01,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 173 transitions. [2023-02-15 09:49:01,984 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 173 transitions. Word has length 52 [2023-02-15 09:49:01,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:49:01,984 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 173 transitions. [2023-02-15 09:49:01,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 09:49:01,985 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 173 transitions. [2023-02-15 09:49:01,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 09:49:01,985 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:49:01,985 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:49:01,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-15 09:49:02,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 09:49:02,192 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:49:02,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:49:02,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1330474501, now seen corresponding path program 7 times [2023-02-15 09:49:02,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:49:02,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232636325] [2023-02-15 09:49:02,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:49:02,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:49:02,204 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:49:02,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448435865] [2023-02-15 09:49:02,209 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 09:49:02,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:49:02,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:49:02,210 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:49:02,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 09:49:02,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:49:02,325 WARN L261 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 102 conjunts are in the unsatisfiable core [2023-02-15 09:49:02,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:49:02,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 09:49:02,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:49:02,389 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 0 case distinctions, treesize of input 27 treesize of output 31 [2023-02-15 09:49:02,393 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 09:49:02,396 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 26 [2023-02-15 09:49:02,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:49:02,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:49:02,508 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 54 treesize of output 43 [2023-02-15 09:49:02,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:49:02,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:49:02,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:49:02,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:49:02,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 73 [2023-02-15 09:49:03,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:49:03,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:49:03,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:49:03,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:49:03,672 INFO L321 Elim1Store]: treesize reduction 98, result has 47.0 percent of original size [2023-02-15 09:49:03,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 129 [2023-02-15 09:49:04,424 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2023-02-15 09:49:04,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 164 treesize of output 80 [2023-02-15 09:49:04,478 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 40 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 09:49:04,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:49:05,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:49:05,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232636325] [2023-02-15 09:49:05,429 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:49:05,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448435865] [2023-02-15 09:49:05,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448435865] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:49:05,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 09:49:05,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2023-02-15 09:49:05,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535533484] [2023-02-15 09:49:05,430 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 09:49:05,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-15 09:49:05,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:49:05,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-15 09:49:05,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1613, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 09:49:05,431 INFO L87 Difference]: Start difference. First operand 135 states and 173 transitions. Second operand has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 09:49:07,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:49:07,396 INFO L93 Difference]: Finished difference Result 177 states and 224 transitions. [2023-02-15 09:49:07,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-15 09:49:07,397 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 54 [2023-02-15 09:49:07,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:49:07,398 INFO L225 Difference]: With dead ends: 177 [2023-02-15 09:49:07,398 INFO L226 Difference]: Without dead ends: 173 [2023-02-15 09:49:07,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=405, Invalid=3377, Unknown=0, NotChecked=0, Total=3782 [2023-02-15 09:49:07,399 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 98 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-15 09:49:07,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 294 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1088 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-15 09:49:07,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-02-15 09:49:07,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 156. [2023-02-15 09:49:07,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 112 states have (on average 1.1160714285714286) internal successors, (125), 113 states have internal predecessors, (125), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2023-02-15 09:49:07,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 199 transitions. [2023-02-15 09:49:07,441 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 199 transitions. Word has length 54 [2023-02-15 09:49:07,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:49:07,441 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 199 transitions. [2023-02-15 09:49:07,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 09:49:07,441 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 199 transitions. [2023-02-15 09:49:07,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 09:49:07,442 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:49:07,442 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:49:07,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 09:49:07,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-15 09:49:07,643 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:49:07,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:49:07,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1367492605, now seen corresponding path program 8 times [2023-02-15 09:49:07,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:49:07,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898738809] [2023-02-15 09:49:07,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:49:07,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:49:07,662 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:49:07,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624947524] [2023-02-15 09:49:07,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:49:07,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:49:07,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:49:07,668 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:49:07,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 09:49:07,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:49:07,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:49:07,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 09:49:07,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:49:07,842 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 09:49:07,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:49:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 09:49:07,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:49:07,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898738809] [2023-02-15 09:49:07,917 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:49:07,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624947524] [2023-02-15 09:49:07,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624947524] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:49:07,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:49:07,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-02-15 09:49:07,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603043769] [2023-02-15 09:49:07,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:49:07,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 09:49:07,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:49:07,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 09:49:07,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-02-15 09:49:07,926 INFO L87 Difference]: Start difference. First operand 156 states and 199 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 09:49:08,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:49:08,274 INFO L93 Difference]: Finished difference Result 369 states and 478 transitions. [2023-02-15 09:49:08,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 09:49:08,274 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2023-02-15 09:49:08,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:49:08,276 INFO L225 Difference]: With dead ends: 369 [2023-02-15 09:49:08,276 INFO L226 Difference]: Without dead ends: 269 [2023-02-15 09:49:08,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2023-02-15 09:49:08,277 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 316 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 09:49:08,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 261 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 09:49:08,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2023-02-15 09:49:08,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 226. [2023-02-15 09:49:08,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 157 states have (on average 1.1210191082802548) internal successors, (176), 158 states have internal predecessors, (176), 61 states have call successors, (61), 7 states have call predecessors, (61), 7 states have return successors, (61), 60 states have call predecessors, (61), 61 states have call successors, (61) [2023-02-15 09:49:08,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 298 transitions. [2023-02-15 09:49:08,308 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 298 transitions. Word has length 56 [2023-02-15 09:49:08,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:49:08,308 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 298 transitions. [2023-02-15 09:49:08,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 09:49:08,308 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 298 transitions. [2023-02-15 09:49:08,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 09:49:08,309 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:49:08,309 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:49:08,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 09:49:08,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-15 09:49:08,513 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:49:08,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:49:08,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1777525379, now seen corresponding path program 9 times [2023-02-15 09:49:08,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:49:08,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447513679] [2023-02-15 09:49:08,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:49:08,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:49:08,530 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:49:08,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148846054] [2023-02-15 09:49:08,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:49:08,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:49:08,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:49:08,539 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:49:08,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 09:49:08,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-15 09:49:08,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:49:08,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 09:49:08,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:49:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 09:49:08,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:49:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 09:49:08,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:49:08,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447513679] [2023-02-15 09:49:08,816 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 09:49:08,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148846054] [2023-02-15 09:49:08,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148846054] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:49:08,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:49:08,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-02-15 09:49:08,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884726535] [2023-02-15 09:49:08,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:49:08,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 09:49:08,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:49:08,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 09:49:08,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-02-15 09:49:08,818 INFO L87 Difference]: Start difference. First operand 226 states and 298 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 09:49:09,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:49:09,104 INFO L93 Difference]: Finished difference Result 254 states and 324 transitions. [2023-02-15 09:49:09,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 09:49:09,104 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2023-02-15 09:49:09,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:49:09,105 INFO L225 Difference]: With dead ends: 254 [2023-02-15 09:49:09,105 INFO L226 Difference]: Without dead ends: 250 [2023-02-15 09:49:09,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2023-02-15 09:49:09,106 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 105 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 09:49:09,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 340 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 09:49:09,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-02-15 09:49:09,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 228. [2023-02-15 09:49:09,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 159 states have (on average 1.119496855345912) internal successors, (178), 160 states have internal predecessors, (178), 61 states have call successors, (61), 7 states have call predecessors, (61), 7 states have return successors, (61), 60 states have call predecessors, (61), 61 states have call successors, (61) [2023-02-15 09:49:09,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 300 transitions. [2023-02-15 09:49:09,140 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 300 transitions. Word has length 56 [2023-02-15 09:49:09,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:49:09,141 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 300 transitions. [2023-02-15 09:49:09,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 09:49:09,141 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 300 transitions. [2023-02-15 09:49:09,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-15 09:49:09,142 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:49:09,142 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:49:09,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-15 09:49:09,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-15 09:49:09,347 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:49:09,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:49:09,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1248328447, now seen corresponding path program 10 times [2023-02-15 09:49:09,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:49:09,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149966685] [2023-02-15 09:49:09,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:49:09,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:49:09,368 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 09:49:09,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445367262] [2023-02-15 09:49:09,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 09:49:09,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:49:09,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:49:09,369 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:49:09,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 09:49:09,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 09:49:09,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:49:09,578 WARN L261 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 125 conjunts are in the unsatisfiable core [2023-02-15 09:49:09,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:49:09,586 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 10 treesize of output 8 [2023-02-15 09:49:09,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:49:09,610 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 0 case distinctions, treesize of input 27 treesize of output 31 [2023-02-15 09:49:09,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2023-02-15 09:49:09,618 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 09:49:09,623 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 09:49:09,681 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 64 treesize of output 53 [2023-02-15 09:49:09,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 83 [2023-02-15 09:49:09,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 113 [2023-02-15 09:49:11,787 INFO L321 Elim1Store]: treesize reduction 186, result has 47.9 percent of original size [2023-02-15 09:49:11,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 134 treesize of output 219 [2023-02-15 09:49:21,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:49:21,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:49:21,753 INFO L190 IndexEqualityManager]: detected not equals via solver