./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/nested3-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3dbbec33 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/loops-crafted-1/nested3-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ed8e064f31e82b4c33cb383334d25637eef982ae8d5b8603579b97c7fdfe808e --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 11:40:45,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 11:40:45,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 11:40:45,066 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 11:40:45,066 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 11:40:45,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 11:40:45,071 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 11:40:45,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 11:40:45,074 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 11:40:45,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 11:40:45,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 11:40:45,081 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 11:40:45,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 11:40:45,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 11:40:45,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 11:40:45,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 11:40:45,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 11:40:45,086 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 11:40:45,087 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 11:40:45,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 11:40:45,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 11:40:45,092 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 11:40:45,093 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 11:40:45,094 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 11:40:45,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 11:40:45,100 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 11:40:45,100 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 11:40:45,101 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 11:40:45,101 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 11:40:45,102 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 11:40:45,102 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 11:40:45,103 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 11:40:45,104 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 11:40:45,105 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 11:40:45,106 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 11:40:45,106 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 11:40:45,106 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 11:40:45,107 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 11:40:45,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 11:40:45,108 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 11:40:45,108 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 11:40:45,109 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 11:40:45,131 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 11:40:45,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 11:40:45,132 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 11:40:45,132 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 11:40:45,132 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 11:40:45,133 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 11:40:45,133 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 11:40:45,133 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 11:40:45,133 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 11:40:45,133 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 11:40:45,134 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 11:40:45,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 11:40:45,134 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 11:40:45,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 11:40:45,135 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 11:40:45,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 11:40:45,135 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 11:40:45,135 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 11:40:45,135 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 11:40:45,135 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 11:40:45,135 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 11:40:45,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 11:40:45,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 11:40:45,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 11:40:45,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 11:40:45,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 11:40:45,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 11:40:45,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 11:40:45,136 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 11:40:45,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 11:40:45,137 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 11:40:45,137 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 11:40:45,137 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 11:40:45,137 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 11:40:45,137 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 11:40:45,137 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed8e064f31e82b4c33cb383334d25637eef982ae8d5b8603579b97c7fdfe808e [2023-02-14 11:40:45,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 11:40:45,340 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 11:40:45,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 11:40:45,342 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 11:40:45,342 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 11:40:45,343 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/nested3-1.c [2023-02-14 11:40:46,328 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 11:40:46,493 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 11:40:46,494 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested3-1.c [2023-02-14 11:40:46,498 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2986abdf7/3518dcd4f071452aba423e220f652639/FLAG5ad0a14a3 [2023-02-14 11:40:46,507 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2986abdf7/3518dcd4f071452aba423e220f652639 [2023-02-14 11:40:46,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 11:40:46,510 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 11:40:46,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 11:40:46,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 11:40:46,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 11:40:46,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:40:46" (1/1) ... [2023-02-14 11:40:46,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67a662bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:40:46, skipping insertion in model container [2023-02-14 11:40:46,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:40:46" (1/1) ... [2023-02-14 11:40:46,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 11:40:46,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 11:40:46,609 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/loops-crafted-1/nested3-1.c[321,334] [2023-02-14 11:40:46,618 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 11:40:46,624 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 11:40:46,631 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/loops-crafted-1/nested3-1.c[321,334] [2023-02-14 11:40:46,633 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 11:40:46,642 INFO L208 MainTranslator]: Completed translation [2023-02-14 11:40:46,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:40:46 WrapperNode [2023-02-14 11:40:46,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 11:40:46,643 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 11:40:46,643 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 11:40:46,643 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 11:40:46,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:40:46" (1/1) ... [2023-02-14 11:40:46,651 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:40:46" (1/1) ... [2023-02-14 11:40:46,662 INFO L138 Inliner]: procedures = 12, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2023-02-14 11:40:46,662 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 11:40:46,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 11:40:46,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 11:40:46,663 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 11:40:46,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:40:46" (1/1) ... [2023-02-14 11:40:46,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:40:46" (1/1) ... [2023-02-14 11:40:46,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:40:46" (1/1) ... [2023-02-14 11:40:46,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:40:46" (1/1) ... [2023-02-14 11:40:46,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:40:46" (1/1) ... [2023-02-14 11:40:46,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:40:46" (1/1) ... [2023-02-14 11:40:46,674 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:40:46" (1/1) ... [2023-02-14 11:40:46,675 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:40:46" (1/1) ... [2023-02-14 11:40:46,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 11:40:46,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 11:40:46,677 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 11:40:46,677 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 11:40:46,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:40:46" (1/1) ... [2023-02-14 11:40:46,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 11:40:46,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:40:46,704 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) [2023-02-14 11:40:46,721 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 [2023-02-14 11:40:46,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 11:40:46,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 11:40:46,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 11:40:46,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 11:40:46,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-14 11:40:46,752 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-14 11:40:46,790 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 11:40:46,792 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 11:40:46,874 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 11:40:46,878 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 11:40:46,878 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-14 11:40:46,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:40:46 BoogieIcfgContainer [2023-02-14 11:40:46,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 11:40:46,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 11:40:46,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 11:40:46,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 11:40:46,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 11:40:46" (1/3) ... [2023-02-14 11:40:46,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54ac184b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:40:46, skipping insertion in model container [2023-02-14 11:40:46,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:40:46" (2/3) ... [2023-02-14 11:40:46,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54ac184b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:40:46, skipping insertion in model container [2023-02-14 11:40:46,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:40:46" (3/3) ... [2023-02-14 11:40:46,885 INFO L112 eAbstractionObserver]: Analyzing ICFG nested3-1.c [2023-02-14 11:40:46,896 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 11:40:46,896 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 11:40:46,925 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 11:40:46,929 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;@6074343e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 11:40:46,930 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 11:40:46,932 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 11:40:46,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-14 11:40:46,937 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:40:46,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:40:46,937 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:40:46,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:40:46,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1810304921, now seen corresponding path program 1 times [2023-02-14 11:40:46,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:40:46,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314236852] [2023-02-14 11:40:46,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:40:46,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:40:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:40:47,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:40:47,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:40:47,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314236852] [2023-02-14 11:40:47,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314236852] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:40:47,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 11:40:47,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 11:40:47,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362951651] [2023-02-14 11:40:47,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:40:47,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 11:40:47,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:40:47,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 11:40:47,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 11:40:47,185 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-02-14 11:40:47,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:40:47,244 INFO L93 Difference]: Finished difference Result 45 states and 74 transitions. [2023-02-14 11:40:47,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 11:40:47,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 7 [2023-02-14 11:40:47,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:40:47,254 INFO L225 Difference]: With dead ends: 45 [2023-02-14 11:40:47,254 INFO L226 Difference]: Without dead ends: 23 [2023-02-14 11:40:47,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 11:40:47,262 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:40:47,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 44 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:40:47,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-14 11:40:47,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2023-02-14 11:40:47,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 11:40:47,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-02-14 11:40:47,297 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 7 [2023-02-14 11:40:47,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:40:47,298 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-02-14 11:40:47,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-02-14 11:40:47,299 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-02-14 11:40:47,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-14 11:40:47,300 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:40:47,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:40:47,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 11:40:47,300 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:40:47,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:40:47,301 INFO L85 PathProgramCache]: Analyzing trace with hash 300961951, now seen corresponding path program 1 times [2023-02-14 11:40:47,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:40:47,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541751175] [2023-02-14 11:40:47,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:40:47,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:40:47,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:40:47,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:40:47,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:40:47,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541751175] [2023-02-14 11:40:47,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541751175] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:40:47,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 11:40:47,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 11:40:47,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386978723] [2023-02-14 11:40:47,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:40:47,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 11:40:47,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:40:47,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 11:40:47,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 11:40:47,417 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-02-14 11:40:47,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:40:47,447 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2023-02-14 11:40:47,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 11:40:47,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 8 [2023-02-14 11:40:47,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:40:47,451 INFO L225 Difference]: With dead ends: 35 [2023-02-14 11:40:47,451 INFO L226 Difference]: Without dead ends: 21 [2023-02-14 11:40:47,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 11:40:47,453 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:40:47,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 33 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:40:47,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-14 11:40:47,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2023-02-14 11:40:47,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 11:40:47,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-02-14 11:40:47,461 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 8 [2023-02-14 11:40:47,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:40:47,462 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-02-14 11:40:47,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-02-14 11:40:47,464 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-02-14 11:40:47,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-14 11:40:47,465 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:40:47,465 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:40:47,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 11:40:47,466 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:40:47,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:40:47,467 INFO L85 PathProgramCache]: Analyzing trace with hash 766069286, now seen corresponding path program 1 times [2023-02-14 11:40:47,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:40:47,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453176232] [2023-02-14 11:40:47,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:40:47,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:40:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:40:47,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:40:47,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:40:47,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453176232] [2023-02-14 11:40:47,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453176232] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:40:47,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 11:40:47,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 11:40:47,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824836518] [2023-02-14 11:40:47,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:40:47,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 11:40:47,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:40:47,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 11:40:47,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 11:40:47,566 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-02-14 11:40:47,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:40:47,582 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2023-02-14 11:40:47,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 11:40:47,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 9 [2023-02-14 11:40:47,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:40:47,583 INFO L225 Difference]: With dead ends: 35 [2023-02-14 11:40:47,584 INFO L226 Difference]: Without dead ends: 20 [2023-02-14 11:40:47,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 11:40:47,586 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:40:47,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:40:47,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-14 11:40:47,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2023-02-14 11:40:47,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 11:40:47,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-02-14 11:40:47,594 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2023-02-14 11:40:47,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:40:47,595 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-02-14 11:40:47,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-02-14 11:40:47,595 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-02-14 11:40:47,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-14 11:40:47,595 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:40:47,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:40:47,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 11:40:47,596 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:40:47,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:40:47,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1993625471, now seen corresponding path program 1 times [2023-02-14 11:40:47,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:40:47,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319570315] [2023-02-14 11:40:47,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:40:47,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:40:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:40:47,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:40:47,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:40:47,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319570315] [2023-02-14 11:40:47,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319570315] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:40:47,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324175847] [2023-02-14 11:40:47,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:40:47,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:40:47,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:40:47,720 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) [2023-02-14 11:40:47,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 11:40:47,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:40:47,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-14 11:40:47,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:40:47,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:40:47,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:40:47,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:40:47,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324175847] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:40:47,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:40:47,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-14 11:40:47,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980364345] [2023-02-14 11:40:47,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:40:47,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 11:40:47,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:40:47,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 11:40:47,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-02-14 11:40:47,804 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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) [2023-02-14 11:40:47,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:40:47,828 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2023-02-14 11:40:47,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 11:40:47,828 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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 10 [2023-02-14 11:40:47,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:40:47,829 INFO L225 Difference]: With dead ends: 39 [2023-02-14 11:40:47,829 INFO L226 Difference]: Without dead ends: 23 [2023-02-14 11:40:47,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-02-14 11:40:47,830 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:40:47,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:40:47,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-14 11:40:47,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-02-14 11:40:47,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 11:40:47,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-02-14 11:40:47,834 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 10 [2023-02-14 11:40:47,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:40:47,835 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-02-14 11:40:47,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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) [2023-02-14 11:40:47,835 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-02-14 11:40:47,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-14 11:40:47,835 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:40:47,836 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:40:47,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 11:40:48,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:40:48,040 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:40:48,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:40:48,041 INFO L85 PathProgramCache]: Analyzing trace with hash 775784678, now seen corresponding path program 2 times [2023-02-14 11:40:48,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:40:48,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475421155] [2023-02-14 11:40:48,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:40:48,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:40:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:40:48,178 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:40:48,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:40:48,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475421155] [2023-02-14 11:40:48,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475421155] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:40:48,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228261173] [2023-02-14 11:40:48,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:40:48,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:40:48,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:40:48,198 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) [2023-02-14 11:40:48,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 11:40:48,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:40:48,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:40:48,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-14 11:40:48,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:40:48,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:40:48,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:40:48,344 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:40:48,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228261173] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:40:48,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:40:48,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-14 11:40:48,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722742154] [2023-02-14 11:40:48,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:40:48,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 11:40:48,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:40:48,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 11:40:48,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2023-02-14 11:40:48,346 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 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) [2023-02-14 11:40:48,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:40:48,509 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2023-02-14 11:40:48,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 11:40:48,510 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 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 [2023-02-14 11:40:48,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:40:48,510 INFO L225 Difference]: With dead ends: 48 [2023-02-14 11:40:48,510 INFO L226 Difference]: Without dead ends: 29 [2023-02-14 11:40:48,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2023-02-14 11:40:48,511 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:40:48,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 127 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:40:48,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-14 11:40:48,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-02-14 11:40:48,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 11:40:48,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-02-14 11:40:48,516 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 13 [2023-02-14 11:40:48,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:40:48,516 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-02-14 11:40:48,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 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) [2023-02-14 11:40:48,516 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-02-14 11:40:48,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-14 11:40:48,517 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:40:48,517 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:40:48,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-14 11:40:48,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:40:48,721 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:40:48,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:40:48,722 INFO L85 PathProgramCache]: Analyzing trace with hash 2064634630, now seen corresponding path program 3 times [2023-02-14 11:40:48,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:40:48,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751984203] [2023-02-14 11:40:48,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:40:48,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:40:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:40:48,970 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:40:48,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:40:48,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751984203] [2023-02-14 11:40:48,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751984203] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:40:48,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151174046] [2023-02-14 11:40:48,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 11:40:48,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:40:48,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:40:48,997 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) [2023-02-14 11:40:49,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 11:40:49,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-14 11:40:49,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:40:49,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 11:40:49,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:40:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-14 11:40:49,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 11:40:49,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151174046] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 11:40:49,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 11:40:49,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 17 [2023-02-14 11:40:49,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75201726] [2023-02-14 11:40:49,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 11:40:49,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 11:40:49,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:40:49,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 11:40:49,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-02-14 11:40:49,292 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2023-02-14 11:40:49,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:40:49,466 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2023-02-14 11:40:49,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 11:40:49,467 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 19 [2023-02-14 11:40:49,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:40:49,467 INFO L225 Difference]: With dead ends: 35 [2023-02-14 11:40:49,467 INFO L226 Difference]: Without dead ends: 33 [2023-02-14 11:40:49,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-02-14 11:40:49,468 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 11:40:49,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 57 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 11:40:49,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-14 11:40:49,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2023-02-14 11:40:49,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 11:40:49,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2023-02-14 11:40:49,474 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 19 [2023-02-14 11:40:49,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:40:49,474 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2023-02-14 11:40:49,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2023-02-14 11:40:49,474 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2023-02-14 11:40:49,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-14 11:40:49,475 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:40:49,475 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:40:49,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 11:40:49,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:40:49,679 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:40:49,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:40:49,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1529129531, now seen corresponding path program 1 times [2023-02-14 11:40:49,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:40:49,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392612770] [2023-02-14 11:40:49,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:40:49,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:40:49,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:40:49,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-14 11:40:49,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:40:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 11:40:49,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:40:49,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392612770] [2023-02-14 11:40:49,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392612770] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:40:49,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706687329] [2023-02-14 11:40:49,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:40:49,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:40:49,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:40:49,858 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) [2023-02-14 11:40:49,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 11:40:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:40:49,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 11:40:49,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:40:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-14 11:40:49,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:40:50,071 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-14 11:40:50,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706687329] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:40:50,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:40:50,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 21 [2023-02-14 11:40:50,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795958656] [2023-02-14 11:40:50,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:40:50,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-14 11:40:50,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:40:50,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-14 11:40:50,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2023-02-14 11:40:50,074 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 11:40:50,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:40:50,748 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2023-02-14 11:40:50,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-14 11:40:50,749 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2023-02-14 11:40:50,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:40:50,749 INFO L225 Difference]: With dead ends: 108 [2023-02-14 11:40:50,749 INFO L226 Difference]: Without dead ends: 79 [2023-02-14 11:40:50,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=618, Invalid=3542, Unknown=0, NotChecked=0, Total=4160 [2023-02-14 11:40:50,751 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 46 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 11:40:50,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 158 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 11:40:50,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-14 11:40:50,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2023-02-14 11:40:50,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 70 states have internal predecessors, (76), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 11:40:50,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2023-02-14 11:40:50,763 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 26 [2023-02-14 11:40:50,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:40:50,763 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2023-02-14 11:40:50,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 11:40:50,764 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2023-02-14 11:40:50,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-02-14 11:40:50,765 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:40:50,765 INFO L195 NwaCegarLoop]: trace histogram [44, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:40:50,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-14 11:40:50,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:40:50,969 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:40:50,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:40:50,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1271803231, now seen corresponding path program 2 times [2023-02-14 11:40:50,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:40:50,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107639882] [2023-02-14 11:40:50,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:40:50,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:40:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:40:51,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 11:40:51,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:40:51,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-14 11:40:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:40:51,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-02-14 11:40:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:40:51,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-02-14 11:40:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:40:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 444 proven. 66 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2023-02-14 11:40:51,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:40:51,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107639882] [2023-02-14 11:40:51,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107639882] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:40:51,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667760462] [2023-02-14 11:40:51,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 11:40:51,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:40:51,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:40:51,277 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) [2023-02-14 11:40:51,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 11:40:51,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 11:40:51,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:40:51,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-14 11:40:51,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:40:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 8 proven. 931 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-02-14 11:40:51,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:40:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 43 proven. 896 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-02-14 11:40:51,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667760462] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:40:51,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:40:51,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 34 [2023-02-14 11:40:51,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043683800] [2023-02-14 11:40:51,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:40:51,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-14 11:40:51,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:40:51,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-14 11:40:51,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2023-02-14 11:40:51,948 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 11:40:57,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:40:57,360 INFO L93 Difference]: Finished difference Result 254 states and 300 transitions. [2023-02-14 11:40:57,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2023-02-14 11:40:57,365 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 84 [2023-02-14 11:40:57,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:40:57,368 INFO L225 Difference]: With dead ends: 254 [2023-02-14 11:40:57,368 INFO L226 Difference]: Without dead ends: 179 [2023-02-14 11:40:57,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8825 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3165, Invalid=21327, Unknown=0, NotChecked=0, Total=24492 [2023-02-14 11:40:57,377 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 99 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 11:40:57,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 233 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1227 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-14 11:40:57,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-02-14 11:40:57,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2023-02-14 11:40:57,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 163 states have (on average 1.0797546012269938) internal successors, (176), 164 states have internal predecessors, (176), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-14 11:40:57,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 199 transitions. [2023-02-14 11:40:57,419 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 199 transitions. Word has length 84 [2023-02-14 11:40:57,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:40:57,420 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 199 transitions. [2023-02-14 11:40:57,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 11:40:57,420 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 199 transitions. [2023-02-14 11:40:57,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-02-14 11:40:57,429 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:40:57,430 INFO L195 NwaCegarLoop]: trace histogram [120, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:40:57,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 11:40:57,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:40:57,634 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:40:57,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:40:57,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1147001079, now seen corresponding path program 3 times [2023-02-14 11:40:57,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:40:57,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701402448] [2023-02-14 11:40:57,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:40:57,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:40:57,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:40:58,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 11:40:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:40:58,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-14 11:40:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:40:58,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-02-14 11:40:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:40:58,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-02-14 11:40:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:40:58,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2023-02-14 11:40:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:40:58,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2023-02-14 11:40:58,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:40:58,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-02-14 11:40:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:40:58,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2023-02-14 11:40:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:40:58,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2023-02-14 11:40:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:40:58,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2023-02-14 11:40:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:40:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1551 proven. 78 refuted. 0 times theorem prover too weak. 7101 trivial. 0 not checked. [2023-02-14 11:40:58,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:40:58,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701402448] [2023-02-14 11:40:58,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701402448] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:40:58,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134230047] [2023-02-14 11:40:58,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 11:40:58,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:40:58,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:40:58,147 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) [2023-02-14 11:40:58,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 11:40:58,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-02-14 11:40:58,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:40:58,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-14 11:40:58,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:40:58,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1596 proven. 78 refuted. 0 times theorem prover too weak. 7056 trivial. 0 not checked. [2023-02-14 11:40:58,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:40:59,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1596 proven. 63 refuted. 0 times theorem prover too weak. 7071 trivial. 0 not checked. [2023-02-14 11:40:59,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134230047] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:40:59,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:40:59,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 8] total 23 [2023-02-14 11:40:59,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955563257] [2023-02-14 11:40:59,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:40:59,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-14 11:40:59,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:40:59,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-14 11:40:59,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2023-02-14 11:40:59,061 INFO L87 Difference]: Start difference. First operand 178 states and 199 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 11:40:59,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:40:59,292 INFO L93 Difference]: Finished difference Result 476 states and 594 transitions. [2023-02-14 11:40:59,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-14 11:40:59,292 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 208 [2023-02-14 11:40:59,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:40:59,297 INFO L225 Difference]: With dead ends: 476 [2023-02-14 11:40:59,297 INFO L226 Difference]: Without dead ends: 289 [2023-02-14 11:40:59,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 427 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2023-02-14 11:40:59,301 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 27 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 11:40:59,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 263 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 11:40:59,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-02-14 11:40:59,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 208. [2023-02-14 11:40:59,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 193 states have (on average 1.1709844559585492) internal successors, (226), 194 states have internal predecessors, (226), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-14 11:40:59,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 249 transitions. [2023-02-14 11:40:59,351 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 249 transitions. Word has length 208 [2023-02-14 11:40:59,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:40:59,351 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 249 transitions. [2023-02-14 11:40:59,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 11:40:59,351 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 249 transitions. [2023-02-14 11:40:59,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-02-14 11:40:59,355 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:40:59,355 INFO L195 NwaCegarLoop]: trace histogram [130, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:40:59,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 11:40:59,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:40:59,560 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:40:59,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:40:59,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1425089983, now seen corresponding path program 4 times [2023-02-14 11:40:59,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:40:59,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108968838] [2023-02-14 11:40:59,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:40:59,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:40:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:41:00,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 11:41:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:41:00,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-02-14 11:41:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:41:00,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-02-14 11:41:00,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:41:00,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-14 11:41:00,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:41:00,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2023-02-14 11:41:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:41:00,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2023-02-14 11:41:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:41:00,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2023-02-14 11:41:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:41:00,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2023-02-14 11:41:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:41:00,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2023-02-14 11:41:00,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:41:00,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2023-02-14 11:41:00,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:41:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10075 backedges. 1794 proven. 91 refuted. 0 times theorem prover too weak. 8190 trivial. 0 not checked. [2023-02-14 11:41:00,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:41:00,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108968838] [2023-02-14 11:41:00,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108968838] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:41:00,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426833400] [2023-02-14 11:41:00,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 11:41:00,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:41:00,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:41:00,190 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) [2023-02-14 11:41:00,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 11:41:00,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 11:41:00,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:41:00,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-14 11:41:00,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:41:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 10075 backedges. 20 proven. 9053 refuted. 0 times theorem prover too weak. 1002 trivial. 0 not checked. [2023-02-14 11:41:00,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:41:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 10075 backedges. 53 proven. 9020 refuted. 0 times theorem prover too weak. 1002 trivial. 0 not checked. [2023-02-14 11:41:01,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426833400] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:41:01,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:41:01,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24, 24] total 60 [2023-02-14 11:41:01,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717263219] [2023-02-14 11:41:01,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:41:01,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-14 11:41:01,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:41:01,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-14 11:41:01,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=658, Invalid=2882, Unknown=0, NotChecked=0, Total=3540 [2023-02-14 11:41:01,853 INFO L87 Difference]: Start difference. First operand 208 states and 249 transitions. Second operand has 60 states, 60 states have (on average 2.25) internal successors, (135), 60 states have internal predecessors, (135), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-14 11:43:20,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:20,245 INFO L93 Difference]: Finished difference Result 686 states and 850 transitions. [2023-02-14 11:43:20,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 342 states. [2023-02-14 11:43:20,245 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.25) internal successors, (135), 60 states have internal predecessors, (135), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 218 [2023-02-14 11:43:20,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:20,247 INFO L225 Difference]: With dead ends: 686 [2023-02-14 11:43:20,247 INFO L226 Difference]: Without dead ends: 481 [2023-02-14 11:43:20,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 375 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58015 ImplicationChecksByTransitivity, 137.1s TimeCoverageRelationStatistics Valid=15765, Invalid=125987, Unknown=0, NotChecked=0, Total=141752 [2023-02-14 11:43:20,259 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 213 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 5419 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 5483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 5419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:20,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 712 Invalid, 5483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 5419 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-02-14 11:43:20,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2023-02-14 11:43:20,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 480. [2023-02-14 11:43:20,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 453 states have (on average 1.1523178807947019) internal successors, (522), 454 states have internal predecessors, (522), 24 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-02-14 11:43:20,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 569 transitions. [2023-02-14 11:43:20,339 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 569 transitions. Word has length 218 [2023-02-14 11:43:20,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:20,339 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 569 transitions. [2023-02-14 11:43:20,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.25) internal successors, (135), 60 states have internal predecessors, (135), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-14 11:43:20,339 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 569 transitions. [2023-02-14 11:43:20,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2023-02-14 11:43:20,344 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:20,344 INFO L195 NwaCegarLoop]: trace histogram [308, 23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:20,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-14 11:43:20,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:20,550 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:20,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:20,551 INFO L85 PathProgramCache]: Analyzing trace with hash -377015161, now seen corresponding path program 5 times [2023-02-14 11:43:20,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:20,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165640698] [2023-02-14 11:43:20,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:20,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:21,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-14 11:43:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:21,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-02-14 11:43:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:21,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-02-14 11:43:21,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:21,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-02-14 11:43:21,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:21,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2023-02-14 11:43:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:21,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2023-02-14 11:43:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:21,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2023-02-14 11:43:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:21,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2023-02-14 11:43:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:21,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2023-02-14 11:43:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:21,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2023-02-14 11:43:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:21,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2023-02-14 11:43:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:21,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 261 [2023-02-14 11:43:21,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:21,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 283 [2023-02-14 11:43:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:21,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 305 [2023-02-14 11:43:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:21,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 327 [2023-02-14 11:43:21,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:21,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 349 [2023-02-14 11:43:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:21,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 371 [2023-02-14 11:43:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:21,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 393 [2023-02-14 11:43:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:21,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 415 [2023-02-14 11:43:21,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:21,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 437 [2023-02-14 11:43:21,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:21,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 459 [2023-02-14 11:43:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:21,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 481 [2023-02-14 11:43:21,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:21,809 INFO L134 CoverageAnalysis]: Checked inductivity of 55968 backedges. 4791 proven. 105 refuted. 0 times theorem prover too weak. 51072 trivial. 0 not checked. [2023-02-14 11:43:21,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:21,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165640698] [2023-02-14 11:43:21,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165640698] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:21,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807127093] [2023-02-14 11:43:21,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 11:43:21,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:21,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:21,811 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:43:21,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 11:43:26,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-14 11:43:26,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 11:43:26,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-14 11:43:26,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 11:43:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 55968 backedges. 17299 proven. 105 refuted. 0 times theorem prover too weak. 38564 trivial. 0 not checked. [2023-02-14 11:43:27,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 11:43:27,443 INFO L134 CoverageAnalysis]: Checked inductivity of 55968 backedges. 17109 proven. 105 refuted. 0 times theorem prover too weak. 38754 trivial. 0 not checked. [2023-02-14 11:43:27,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807127093] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 11:43:27,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 11:43:27,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-02-14 11:43:27,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320504727] [2023-02-14 11:43:27,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 11:43:27,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-14 11:43:27,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 11:43:27,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-14 11:43:27,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2023-02-14 11:43:27,446 INFO L87 Difference]: Start difference. First operand 480 states and 569 transitions. Second operand has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 states have internal predecessors, (54), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 11:43:41,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 11:43:41,456 INFO L93 Difference]: Finished difference Result 1310 states and 1752 transitions. [2023-02-14 11:43:41,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-14 11:43:41,457 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 states have internal predecessors, (54), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 492 [2023-02-14 11:43:41,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 11:43:41,460 INFO L225 Difference]: With dead ends: 1310 [2023-02-14 11:43:41,460 INFO L226 Difference]: Without dead ends: 833 [2023-02-14 11:43:41,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1058 GetRequests, 1012 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=780, Invalid=1382, Unknown=0, NotChecked=0, Total=2162 [2023-02-14 11:43:41,461 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 11:43:41,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 300 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 11:43:41,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2023-02-14 11:43:41,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 832. [2023-02-14 11:43:41,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 805 states have (on average 1.0857142857142856) internal successors, (874), 806 states have internal predecessors, (874), 24 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-02-14 11:43:41,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 921 transitions. [2023-02-14 11:43:41,573 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 921 transitions. Word has length 492 [2023-02-14 11:43:41,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 11:43:41,574 INFO L495 AbstractCegarLoop]: Abstraction has 832 states and 921 transitions. [2023-02-14 11:43:41,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 states have internal predecessors, (54), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 11:43:41,574 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 921 transitions. [2023-02-14 11:43:41,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 845 [2023-02-14 11:43:41,588 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 11:43:41,588 INFO L195 NwaCegarLoop]: trace histogram [660, 23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 11:43:41,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 11:43:41,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-14 11:43:41,795 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 11:43:41,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 11:43:41,796 INFO L85 PathProgramCache]: Analyzing trace with hash 195598983, now seen corresponding path program 6 times [2023-02-14 11:43:41,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 11:43:41,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702823849] [2023-02-14 11:43:41,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 11:43:41,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 11:43:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:45,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-14 11:43:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:45,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-02-14 11:43:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:45,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-02-14 11:43:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:45,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2023-02-14 11:43:45,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:45,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2023-02-14 11:43:45,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:45,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 225 [2023-02-14 11:43:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:45,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 263 [2023-02-14 11:43:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:45,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 301 [2023-02-14 11:43:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:45,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 339 [2023-02-14 11:43:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:45,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 377 [2023-02-14 11:43:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:45,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 415 [2023-02-14 11:43:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:45,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 453 [2023-02-14 11:43:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:45,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 491 [2023-02-14 11:43:45,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:45,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 529 [2023-02-14 11:43:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:45,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 567 [2023-02-14 11:43:45,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:45,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 605 [2023-02-14 11:43:45,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:45,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 643 [2023-02-14 11:43:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:45,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 681 [2023-02-14 11:43:45,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:45,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 719 [2023-02-14 11:43:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:45,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 757 [2023-02-14 11:43:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:45,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 795 [2023-02-14 11:43:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:45,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 833 [2023-02-14 11:43:45,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 11:43:45,121 INFO L134 CoverageAnalysis]: Checked inductivity of 233904 backedges. 20247 proven. 465 refuted. 0 times theorem prover too weak. 213192 trivial. 0 not checked. [2023-02-14 11:43:45,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 11:43:45,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702823849] [2023-02-14 11:43:45,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702823849] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 11:43:45,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105374235] [2023-02-14 11:43:45,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 11:43:45,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 11:43:45,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 11:43:45,123 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 11:43:45,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process