./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/sanfoundry_02_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae 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-examples/sanfoundry_02_ground.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3a6236bdd88fd6afaea18904cacfb3d20cec5c672e4775ed237e350d1a6fc96b --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-15 23:25:22,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 23:25:22,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 23:25:22,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 23:25:22,665 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 23:25:22,669 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 23:25:22,674 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 23:25:22,677 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 23:25:22,679 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 23:25:22,685 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 23:25:22,686 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 23:25:22,687 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 23:25:22,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 23:25:22,690 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 23:25:22,693 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 23:25:22,694 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 23:25:22,695 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 23:25:22,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 23:25:22,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 23:25:22,701 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 23:25:22,704 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 23:25:22,704 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 23:25:22,706 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 23:25:22,707 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 23:25:22,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 23:25:22,711 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 23:25:22,711 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 23:25:22,713 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 23:25:22,713 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 23:25:22,715 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 23:25:22,716 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 23:25:22,716 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 23:25:22,717 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 23:25:22,718 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 23:25:22,719 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 23:25:22,719 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 23:25:22,720 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 23:25:22,720 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 23:25:22,720 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 23:25:22,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 23:25:22,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 23:25:22,724 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 23:25:22,754 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 23:25:22,755 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 23:25:22,755 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 23:25:22,755 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 23:25:22,756 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 23:25:22,756 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 23:25:22,757 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 23:25:22,757 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 23:25:22,757 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 23:25:22,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 23:25:22,758 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 23:25:22,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 23:25:22,759 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 23:25:22,759 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 23:25:22,759 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 23:25:22,759 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 23:25:22,759 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 23:25:22,759 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 23:25:22,760 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 23:25:22,760 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 23:25:22,760 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 23:25:22,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 23:25:22,760 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 23:25:22,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 23:25:22,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 23:25:22,761 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 23:25:22,761 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 23:25:22,761 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 23:25:22,762 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 23:25:22,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 23:25:22,762 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 23:25:22,762 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 23:25:22,762 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 23:25:22,763 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 23:25:22,763 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 23:25:22,763 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a6236bdd88fd6afaea18904cacfb3d20cec5c672e4775ed237e350d1a6fc96b [2023-02-15 23:25:22,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 23:25:22,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 23:25:22,998 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 23:25:22,999 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 23:25:22,999 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 23:25:23,000 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sanfoundry_02_ground.i [2023-02-15 23:25:24,040 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 23:25:24,249 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 23:25:24,250 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_02_ground.i [2023-02-15 23:25:24,256 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0db9c9725/bfdb52352e41482eadae1e9027bb5d87/FLAG9a5f2648a [2023-02-15 23:25:24,272 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0db9c9725/bfdb52352e41482eadae1e9027bb5d87 [2023-02-15 23:25:24,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 23:25:24,276 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 23:25:24,277 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 23:25:24,277 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 23:25:24,280 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 23:25:24,280 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:25:24" (1/1) ... [2023-02-15 23:25:24,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8371599 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:25:24, skipping insertion in model container [2023-02-15 23:25:24,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:25:24" (1/1) ... [2023-02-15 23:25:24,291 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 23:25:24,306 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 23:25:24,411 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-examples/sanfoundry_02_ground.i[813,826] [2023-02-15 23:25:24,433 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 23:25:24,440 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 23:25:24,451 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-examples/sanfoundry_02_ground.i[813,826] [2023-02-15 23:25:24,458 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 23:25:24,470 INFO L208 MainTranslator]: Completed translation [2023-02-15 23:25:24,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:25:24 WrapperNode [2023-02-15 23:25:24,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 23:25:24,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 23:25:24,472 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 23:25:24,472 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 23:25:24,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:25:24" (1/1) ... [2023-02-15 23:25:24,484 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:25:24" (1/1) ... [2023-02-15 23:25:24,500 INFO L138 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 93 [2023-02-15 23:25:24,501 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 23:25:24,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 23:25:24,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 23:25:24,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 23:25:24,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:25:24" (1/1) ... [2023-02-15 23:25:24,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:25:24" (1/1) ... [2023-02-15 23:25:24,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:25:24" (1/1) ... [2023-02-15 23:25:24,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:25:24" (1/1) ... [2023-02-15 23:25:24,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:25:24" (1/1) ... [2023-02-15 23:25:24,540 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:25:24" (1/1) ... [2023-02-15 23:25:24,542 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:25:24" (1/1) ... [2023-02-15 23:25:24,547 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:25:24" (1/1) ... [2023-02-15 23:25:24,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 23:25:24,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 23:25:24,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 23:25:24,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 23:25:24,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:25:24" (1/1) ... [2023-02-15 23:25:24,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 23:25:24,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:25:24,586 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 23:25:24,607 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 23:25:24,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 23:25:24,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 23:25:24,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 23:25:24,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 23:25:24,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 23:25:24,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 23:25:24,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 23:25:24,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 23:25:24,624 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 23:25:24,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 23:25:24,687 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 23:25:24,690 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 23:25:24,914 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 23:25:24,918 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 23:25:24,919 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-15 23:25:24,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:25:24 BoogieIcfgContainer [2023-02-15 23:25:24,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 23:25:24,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 23:25:24,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 23:25:24,939 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 23:25:24,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 11:25:24" (1/3) ... [2023-02-15 23:25:24,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a724546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:25:24, skipping insertion in model container [2023-02-15 23:25:24,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:25:24" (2/3) ... [2023-02-15 23:25:24,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a724546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:25:24, skipping insertion in model container [2023-02-15 23:25:24,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:25:24" (3/3) ... [2023-02-15 23:25:24,942 INFO L112 eAbstractionObserver]: Analyzing ICFG sanfoundry_02_ground.i [2023-02-15 23:25:24,963 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 23:25:24,964 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 23:25:25,018 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 23:25:25,026 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;@2c586334, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 23:25:25,027 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 23:25:25,030 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 28 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 23:25:25,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 23:25:25,038 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:25:25,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:25:25,039 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:25:25,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:25:25,044 INFO L85 PathProgramCache]: Analyzing trace with hash -2067048339, now seen corresponding path program 1 times [2023-02-15 23:25:25,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:25:25,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88455789] [2023-02-15 23:25:25,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:25:25,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:25:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:25:25,234 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 23:25:25,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:25:25,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88455789] [2023-02-15 23:25:25,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88455789] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 23:25:25,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 23:25:25,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 23:25:25,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411096275] [2023-02-15 23:25:25,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 23:25:25,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 23:25:25,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:25:25,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 23:25:25,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 23:25:25,277 INFO L87 Difference]: Start difference. First operand has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 28 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:25,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:25:25,361 INFO L93 Difference]: Finished difference Result 62 states and 90 transitions. [2023-02-15 23:25:25,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 23:25:25,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-15 23:25:25,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:25:25,369 INFO L225 Difference]: With dead ends: 62 [2023-02-15 23:25:25,369 INFO L226 Difference]: Without dead ends: 30 [2023-02-15 23:25:25,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 23:25:25,374 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 23:25:25,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 67 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 23:25:25,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-15 23:25:25,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2023-02-15 23:25:25,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 23:25:25,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2023-02-15 23:25:25,406 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 13 [2023-02-15 23:25:25,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:25:25,406 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2023-02-15 23:25:25,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:25,406 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2023-02-15 23:25:25,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 23:25:25,408 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:25:25,408 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:25:25,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 23:25:25,409 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:25:25,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:25:25,409 INFO L85 PathProgramCache]: Analyzing trace with hash -431376725, now seen corresponding path program 1 times [2023-02-15 23:25:25,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:25:25,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198381659] [2023-02-15 23:25:25,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:25:25,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:25:25,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:25:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 23:25:25,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:25:25,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198381659] [2023-02-15 23:25:25,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198381659] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:25:25,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660679076] [2023-02-15 23:25:25,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:25:25,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:25:25,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:25:25,503 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 23:25:25,512 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 23:25:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:25:25,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 23:25:25,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:25:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 23:25:25,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 23:25:25,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660679076] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 23:25:25,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 23:25:25,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-02-15 23:25:25,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446646915] [2023-02-15 23:25:25,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 23:25:25,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 23:25:25,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:25:25,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 23:25:25,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-02-15 23:25:25,633 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:25,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:25:25,659 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2023-02-15 23:25:25,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 23:25:25,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-15 23:25:25,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:25:25,661 INFO L225 Difference]: With dead ends: 51 [2023-02-15 23:25:25,661 INFO L226 Difference]: Without dead ends: 34 [2023-02-15 23:25:25,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-02-15 23:25:25,663 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:25:25,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 54 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:25:25,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-15 23:25:25,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2023-02-15 23:25:25,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 23:25:25,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2023-02-15 23:25:25,669 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 15 [2023-02-15 23:25:25,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:25:25,670 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2023-02-15 23:25:25,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:25,670 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2023-02-15 23:25:25,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-15 23:25:25,671 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:25:25,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:25:25,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 23:25:25,877 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 23:25:25,877 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:25:25,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:25:25,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1763712837, now seen corresponding path program 1 times [2023-02-15 23:25:25,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:25:25,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625889416] [2023-02-15 23:25:25,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:25:25,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:25:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:25:25,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 23:25:25,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:25:25,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625889416] [2023-02-15 23:25:25,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625889416] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:25:25,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907288038] [2023-02-15 23:25:25,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:25:25,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:25:25,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:25:25,959 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 23:25:25,961 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 23:25:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:25:26,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 23:25:26,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:25:26,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 23:25:26,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:25:26,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 23:25:26,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907288038] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:25:26,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:25:26,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-15 23:25:26,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950380429] [2023-02-15 23:25:26,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:25:26,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 23:25:26,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:25:26,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 23:25:26,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-15 23:25:26,078 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:26,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:25:26,119 INFO L93 Difference]: Finished difference Result 65 states and 86 transitions. [2023-02-15 23:25:26,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 23:25:26,120 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-15 23:25:26,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:25:26,120 INFO L225 Difference]: With dead ends: 65 [2023-02-15 23:25:26,121 INFO L226 Difference]: Without dead ends: 40 [2023-02-15 23:25:26,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-15 23:25:26,122 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:25:26,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 80 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:25:26,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-15 23:25:26,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-02-15 23:25:26,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 23:25:26,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2023-02-15 23:25:26,143 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 18 [2023-02-15 23:25:26,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:25:26,144 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2023-02-15 23:25:26,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:26,144 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2023-02-15 23:25:26,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 23:25:26,145 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:25:26,145 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:25:26,153 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 23:25:26,349 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 23:25:26,349 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:25:26,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:25:26,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1149964965, now seen corresponding path program 2 times [2023-02-15 23:25:26,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:25:26,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518489744] [2023-02-15 23:25:26,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:25:26,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:25:26,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:25:26,458 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 23:25:26,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:25:26,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518489744] [2023-02-15 23:25:26,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518489744] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:25:26,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331481133] [2023-02-15 23:25:26,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 23:25:26,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:25:26,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:25:26,461 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 23:25:26,465 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 23:25:26,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 23:25:26,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:25:26,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 23:25:26,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:25:26,560 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 23:25:26,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:25:26,612 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 23:25:26,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331481133] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:25:26,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:25:26,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 13 [2023-02-15 23:25:26,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542431507] [2023-02-15 23:25:26,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:25:26,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 23:25:26,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:25:26,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 23:25:26,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=80, Unknown=0, NotChecked=0, Total=156 [2023-02-15 23:25:26,616 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:26,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:25:26,708 INFO L93 Difference]: Finished difference Result 105 states and 148 transitions. [2023-02-15 23:25:26,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 23:25:26,708 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-15 23:25:26,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:25:26,710 INFO L225 Difference]: With dead ends: 105 [2023-02-15 23:25:26,710 INFO L226 Difference]: Without dead ends: 76 [2023-02-15 23:25:26,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=80, Unknown=0, NotChecked=0, Total=156 [2023-02-15 23:25:26,711 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 64 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 23:25:26,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 158 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 23:25:26,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-15 23:25:26,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2023-02-15 23:25:26,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 72 states have (on average 1.3055555555555556) internal successors, (94), 72 states have internal predecessors, (94), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 23:25:26,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2023-02-15 23:25:26,720 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 27 [2023-02-15 23:25:26,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:25:26,720 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2023-02-15 23:25:26,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:26,721 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2023-02-15 23:25:26,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-15 23:25:26,722 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:25:26,722 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:25:26,731 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 23:25:26,927 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 23:25:26,928 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:25:26,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:25:26,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1960305241, now seen corresponding path program 3 times [2023-02-15 23:25:26,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:25:26,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146202162] [2023-02-15 23:25:26,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:25:26,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:25:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:25:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-02-15 23:25:27,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:25:27,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146202162] [2023-02-15 23:25:27,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146202162] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:25:27,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11679224] [2023-02-15 23:25:27,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 23:25:27,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:25:27,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:25:27,353 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 23:25:27,380 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 23:25:27,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-15 23:25:27,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:25:27,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 23:25:27,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:25:27,540 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-02-15 23:25:27,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:25:27,732 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-02-15 23:25:27,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11679224] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:25:27,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:25:27,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 22 [2023-02-15 23:25:27,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611777169] [2023-02-15 23:25:27,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:25:27,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 23:25:27,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:25:27,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 23:25:27,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-02-15 23:25:27,737 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand has 22 states, 22 states have (on average 4.2272727272727275) internal successors, (93), 22 states have internal predecessors, (93), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:27,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:25:27,935 INFO L93 Difference]: Finished difference Result 189 states and 272 transitions. [2023-02-15 23:25:27,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 23:25:27,936 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.2272727272727275) internal successors, (93), 22 states have internal predecessors, (93), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-02-15 23:25:27,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:25:27,945 INFO L225 Difference]: With dead ends: 189 [2023-02-15 23:25:27,945 INFO L226 Difference]: Without dead ends: 136 [2023-02-15 23:25:27,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-02-15 23:25:27,947 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 195 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 23:25:27,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 119 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 23:25:27,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-15 23:25:27,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2023-02-15 23:25:27,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 132 states have (on average 1.3181818181818181) internal successors, (174), 132 states have internal predecessors, (174), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 23:25:27,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 178 transitions. [2023-02-15 23:25:27,962 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 178 transitions. Word has length 57 [2023-02-15 23:25:27,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:25:27,962 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 178 transitions. [2023-02-15 23:25:27,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.2272727272727275) internal successors, (93), 22 states have internal predecessors, (93), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:27,962 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 178 transitions. [2023-02-15 23:25:27,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-02-15 23:25:27,965 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:25:27,965 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:25:27,974 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 23:25:28,171 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 23:25:28,171 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:25:28,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:25:28,172 INFO L85 PathProgramCache]: Analyzing trace with hash 2113477765, now seen corresponding path program 4 times [2023-02-15 23:25:28,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:25:28,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417939199] [2023-02-15 23:25:28,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:25:28,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:25:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:25:28,800 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2023-02-15 23:25:28,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:25:28,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417939199] [2023-02-15 23:25:28,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417939199] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:25:28,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146295910] [2023-02-15 23:25:28,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 23:25:28,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:25:28,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:25:28,803 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 23:25:28,832 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 23:25:28,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 23:25:28,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:25:28,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 23:25:28,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:25:29,014 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2023-02-15 23:25:29,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:25:29,604 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2023-02-15 23:25:29,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146295910] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:25:29,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:25:29,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2023-02-15 23:25:29,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985788126] [2023-02-15 23:25:29,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:25:29,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-15 23:25:29,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:25:29,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-15 23:25:29,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 23:25:29,608 INFO L87 Difference]: Start difference. First operand 136 states and 178 transitions. Second operand has 45 states, 45 states have (on average 2.2222222222222223) internal successors, (100), 45 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:30,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:25:30,092 INFO L93 Difference]: Finished difference Result 361 states and 532 transitions. [2023-02-15 23:25:30,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-15 23:25:30,092 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2222222222222223) internal successors, (100), 45 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2023-02-15 23:25:30,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:25:30,094 INFO L225 Difference]: With dead ends: 361 [2023-02-15 23:25:30,094 INFO L226 Difference]: Without dead ends: 268 [2023-02-15 23:25:30,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 23:25:30,096 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 637 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 23:25:30,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 166 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 23:25:30,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2023-02-15 23:25:30,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2023-02-15 23:25:30,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 264 states have (on average 1.3257575757575757) internal successors, (350), 264 states have internal predecessors, (350), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 23:25:30,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 354 transitions. [2023-02-15 23:25:30,113 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 354 transitions. Word has length 107 [2023-02-15 23:25:30,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:25:30,114 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 354 transitions. [2023-02-15 23:25:30,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2222222222222223) internal successors, (100), 45 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:30,114 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 354 transitions. [2023-02-15 23:25:30,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2023-02-15 23:25:30,121 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:25:30,121 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:25:30,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 23:25:30,327 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 23:25:30,328 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:25:30,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:25:30,328 INFO L85 PathProgramCache]: Analyzing trace with hash -2000652775, now seen corresponding path program 5 times [2023-02-15 23:25:30,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:25:30,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351339904] [2023-02-15 23:25:30,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:25:30,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:25:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:25:32,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2023-02-15 23:25:32,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:25:32,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351339904] [2023-02-15 23:25:32,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351339904] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:25:32,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309956622] [2023-02-15 23:25:32,178 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 23:25:32,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:25:32,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:25:32,181 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 23:25:32,183 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 23:25:52,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2023-02-15 23:25:52,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:25:52,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-15 23:25:52,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:25:53,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2023-02-15 23:25:53,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:25:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 0 proven. 2380 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2023-02-15 23:25:55,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309956622] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:25:55,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:25:55,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 43, 43] total 86 [2023-02-15 23:25:55,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613903576] [2023-02-15 23:25:55,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:25:55,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2023-02-15 23:25:55,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:25:55,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2023-02-15 23:25:55,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2023-02-15 23:25:55,139 INFO L87 Difference]: Start difference. First operand 268 states and 354 transitions. Second operand has 86 states, 86 states have (on average 4.058139534883721) internal successors, (349), 86 states have internal predecessors, (349), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:56,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:25:56,447 INFO L93 Difference]: Finished difference Result 701 states and 1040 transitions. [2023-02-15 23:25:56,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-02-15 23:25:56,447 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 4.058139534883721) internal successors, (349), 86 states have internal predecessors, (349), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 217 [2023-02-15 23:25:56,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:25:56,449 INFO L225 Difference]: With dead ends: 701 [2023-02-15 23:25:56,449 INFO L226 Difference]: Without dead ends: 520 [2023-02-15 23:25:56,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2023-02-15 23:25:56,452 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1108 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1108 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 23:25:56,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1108 Valid, 256 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 23:25:56,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2023-02-15 23:25:56,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 520. [2023-02-15 23:25:56,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 516 states have (on average 1.3294573643410852) internal successors, (686), 516 states have internal predecessors, (686), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 23:25:56,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 690 transitions. [2023-02-15 23:25:56,475 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 690 transitions. Word has length 217 [2023-02-15 23:25:56,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:25:56,476 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 690 transitions. [2023-02-15 23:25:56,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 4.058139534883721) internal successors, (349), 86 states have internal predecessors, (349), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:25:56,477 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 690 transitions. [2023-02-15 23:25:56,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2023-02-15 23:25:56,482 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:25:56,482 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:25:56,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-15 23:25:56,683 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 23:25:56,683 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:25:56,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:25:56,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1429388283, now seen corresponding path program 6 times [2023-02-15 23:25:56,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:25:56,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222513134] [2023-02-15 23:25:56,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:25:56,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:25:56,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:26:02,515 INFO L134 CoverageAnalysis]: Checked inductivity of 17101 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 10045 trivial. 0 not checked. [2023-02-15 23:26:02,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:26:02,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222513134] [2023-02-15 23:26:02,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222513134] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:26:02,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885138315] [2023-02-15 23:26:02,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 23:26:02,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:26:02,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:26:02,525 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 23:26:02,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process