./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sep.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/reducercommutativity/sep.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-15 23:43:48,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 23:43:48,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 23:43:49,002 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 23:43:49,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 23:43:49,006 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 23:43:49,007 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 23:43:49,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 23:43:49,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 23:43:49,017 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 23:43:49,018 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 23:43:49,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 23:43:49,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 23:43:49,023 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 23:43:49,024 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 23:43:49,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 23:43:49,026 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 23:43:49,027 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 23:43:49,028 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 23:43:49,030 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 23:43:49,031 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 23:43:49,032 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 23:43:49,034 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 23:43:49,034 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 23:43:49,042 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 23:43:49,043 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 23:43:49,044 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 23:43:49,044 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 23:43:49,046 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 23:43:49,046 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 23:43:49,046 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 23:43:49,047 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 23:43:49,049 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 23:43:49,050 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 23:43:49,050 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 23:43:49,050 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 23:43:49,051 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 23:43:49,051 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 23:43:49,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 23:43:49,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 23:43:49,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 23:43:49,054 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 23:43:49,082 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 23:43:49,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 23:43:49,083 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 23:43:49,083 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 23:43:49,084 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 23:43:49,084 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 23:43:49,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 23:43:49,085 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 23:43:49,085 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 23:43:49,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 23:43:49,086 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 23:43:49,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 23:43:49,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 23:43:49,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 23:43:49,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 23:43:49,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 23:43:49,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 23:43:49,088 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 23:43:49,088 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 23:43:49,088 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 23:43:49,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 23:43:49,088 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 23:43:49,089 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 23:43:49,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 23:43:49,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 23:43:49,089 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 23:43:49,089 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 23:43:49,090 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 23:43:49,090 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 23:43:49,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 23:43:49,090 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 23:43:49,090 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 23:43:49,091 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 23:43:49,091 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 23:43:49,091 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 23:43:49,091 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac [2023-02-15 23:43:49,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 23:43:49,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 23:43:49,338 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 23:43:49,339 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 23:43:49,339 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 23:43:49,340 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep.i [2023-02-15 23:43:50,355 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 23:43:50,537 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 23:43:50,537 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep.i [2023-02-15 23:43:50,545 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4856e04c2/1053a3396f5d4d84b2acdc1c6ae5b702/FLAG9bb37e894 [2023-02-15 23:43:50,571 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4856e04c2/1053a3396f5d4d84b2acdc1c6ae5b702 [2023-02-15 23:43:50,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 23:43:50,575 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 23:43:50,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 23:43:50,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 23:43:50,583 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 23:43:50,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:43:50" (1/1) ... [2023-02-15 23:43:50,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41ac17e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:43:50, skipping insertion in model container [2023-02-15 23:43:50,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:43:50" (1/1) ... [2023-02-15 23:43:50,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 23:43:50,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 23:43:50,745 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/reducercommutativity/sep.i[1298,1311] [2023-02-15 23:43:50,749 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 23:43:50,757 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 23:43:50,772 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/reducercommutativity/sep.i[1298,1311] [2023-02-15 23:43:50,773 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 23:43:50,784 INFO L208 MainTranslator]: Completed translation [2023-02-15 23:43:50,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:43:50 WrapperNode [2023-02-15 23:43:50,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 23:43:50,786 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 23:43:50,786 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 23:43:50,786 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 23:43:50,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:43:50" (1/1) ... [2023-02-15 23:43:50,798 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:43:50" (1/1) ... [2023-02-15 23:43:50,813 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2023-02-15 23:43:50,814 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 23:43:50,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 23:43:50,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 23:43:50,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 23:43:50,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:43:50" (1/1) ... [2023-02-15 23:43:50,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:43:50" (1/1) ... [2023-02-15 23:43:50,830 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:43:50" (1/1) ... [2023-02-15 23:43:50,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:43:50" (1/1) ... [2023-02-15 23:43:50,838 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:43:50" (1/1) ... [2023-02-15 23:43:50,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:43:50" (1/1) ... [2023-02-15 23:43:50,842 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:43:50" (1/1) ... [2023-02-15 23:43:50,842 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:43:50" (1/1) ... [2023-02-15 23:43:50,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 23:43:50,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 23:43:50,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 23:43:50,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 23:43:50,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:43:50" (1/1) ... [2023-02-15 23:43:50,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 23:43:50,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:43:50,873 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 23:43:50,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 23:43:50,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 23:43:50,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 23:43:50,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 23:43:50,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 23:43:50,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 23:43:50,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 23:43:50,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 23:43:50,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 23:43:50,905 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2023-02-15 23:43:50,906 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2023-02-15 23:43:50,966 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 23:43:50,968 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 23:43:51,092 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 23:43:51,107 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 23:43:51,107 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 23:43:51,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:43:51 BoogieIcfgContainer [2023-02-15 23:43:51,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 23:43:51,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 23:43:51,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 23:43:51,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 23:43:51,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 11:43:50" (1/3) ... [2023-02-15 23:43:51,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb3b089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:43:51, skipping insertion in model container [2023-02-15 23:43:51,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:43:50" (2/3) ... [2023-02-15 23:43:51,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb3b089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:43:51, skipping insertion in model container [2023-02-15 23:43:51,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:43:51" (3/3) ... [2023-02-15 23:43:51,117 INFO L112 eAbstractionObserver]: Analyzing ICFG sep.i [2023-02-15 23:43:51,131 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 23:43:51,148 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 23:43:51,185 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 23:43:51,209 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;@484894f3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 23:43:51,210 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 23:43:51,214 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 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) [2023-02-15 23:43:51,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 23:43:51,226 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:43:51,227 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:43:51,227 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:43:51,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:43:51,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1158480486, now seen corresponding path program 1 times [2023-02-15 23:43:51,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:43:51,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135500685] [2023-02-15 23:43:51,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:43:51,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:43:51,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:43:51,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 23:43:51,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:43:51,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-15 23:43:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:43:51,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-15 23:43:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:43:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 23:43:51,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:43:51,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135500685] [2023-02-15 23:43:51,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135500685] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:43:51,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138300932] [2023-02-15 23:43:51,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:43:51,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:43:51,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:43:51,621 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:43:51,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 23:43:51,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:43:51,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 23:43:51,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:43:51,747 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 23:43:51,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 23:43:51,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138300932] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 23:43:51,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 23:43:51,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 5 [2023-02-15 23:43:51,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918385825] [2023-02-15 23:43:51,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 23:43:51,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 23:43:51,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:43:51,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 23:43:51,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 23:43:51,805 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 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 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 23:43:51,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:43:51,832 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2023-02-15 23:43:51,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 23:43:51,834 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2023-02-15 23:43:51,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:43:51,838 INFO L225 Difference]: With dead ends: 50 [2023-02-15 23:43:51,838 INFO L226 Difference]: Without dead ends: 22 [2023-02-15 23:43:51,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 23:43:51,844 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:43:51,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:43:51,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-15 23:43:51,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-15 23:43:51,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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) [2023-02-15 23:43:51,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-02-15 23:43:51,870 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2023-02-15 23:43:51,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:43:51,871 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-02-15 23:43:51,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 23:43:51,873 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-02-15 23:43:51,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 23:43:51,875 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:43:51,875 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:43:51,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 23:43:52,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-15 23:43:52,083 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:43:52,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:43:52,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1033293076, now seen corresponding path program 1 times [2023-02-15 23:43:52,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:43:52,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855386465] [2023-02-15 23:43:52,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:43:52,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:43:52,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:43:52,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 23:43:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:43:52,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-15 23:43:52,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:43:52,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-15 23:43:52,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:43:52,209 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 23:43:52,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:43:52,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855386465] [2023-02-15 23:43:52,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855386465] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:43:52,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406655476] [2023-02-15 23:43:52,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:43:52,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:43:52,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:43:52,212 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:43:52,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 23:43:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:43:52,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 23:43:52,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:43:52,324 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-15 23:43:52,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 23:43:52,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406655476] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 23:43:52,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 23:43:52,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-02-15 23:43:52,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493970192] [2023-02-15 23:43:52,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 23:43:52,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 23:43:52,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:43:52,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 23:43:52,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 23:43:52,328 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 23:43:52,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:43:52,371 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2023-02-15 23:43:52,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 23:43:52,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2023-02-15 23:43:52,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:43:52,372 INFO L225 Difference]: With dead ends: 43 [2023-02-15 23:43:52,373 INFO L226 Difference]: Without dead ends: 25 [2023-02-15 23:43:52,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 23:43:52,375 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:43:52,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 30 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:43:52,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-15 23:43:52,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-02-15 23:43:52,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) 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, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 23:43:52,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-02-15 23:43:52,387 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2023-02-15 23:43:52,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:43:52,387 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-02-15 23:43:52,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 23:43:52,388 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-02-15 23:43:52,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 23:43:52,389 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:43:52,389 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:43:52,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 23:43:52,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-15 23:43:52,593 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:43:52,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:43:52,594 INFO L85 PathProgramCache]: Analyzing trace with hash -14370886, now seen corresponding path program 1 times [2023-02-15 23:43:52,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:43:52,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091273245] [2023-02-15 23:43:52,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:43:52,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:43:52,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:43:52,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 23:43:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:43:52,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-15 23:43:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:43:52,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-15 23:43:52,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:43:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-15 23:43:52,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:43:52,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091273245] [2023-02-15 23:43:52,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091273245] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 23:43:52,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 23:43:52,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 23:43:52,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843262291] [2023-02-15 23:43:52,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 23:43:52,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 23:43:52,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:43:52,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 23:43:52,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 23:43:52,806 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 23:43:52,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:43:52,842 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2023-02-15 23:43:52,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 23:43:52,843 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2023-02-15 23:43:52,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:43:52,844 INFO L225 Difference]: With dead ends: 39 [2023-02-15 23:43:52,844 INFO L226 Difference]: Without dead ends: 25 [2023-02-15 23:43:52,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 23:43:52,847 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:43:52,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:43:52,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-15 23:43:52,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-02-15 23:43:52,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 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) [2023-02-15 23:43:52,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-02-15 23:43:52,867 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 37 [2023-02-15 23:43:52,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:43:52,867 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-02-15 23:43:52,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 23:43:52,867 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-02-15 23:43:52,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 23:43:52,871 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:43:52,871 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:43:52,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 23:43:52,872 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:43:52,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:43:52,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1444896732, now seen corresponding path program 1 times [2023-02-15 23:43:52,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:43:52,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545453880] [2023-02-15 23:43:52,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:43:52,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:43:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:43:52,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 23:43:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:43:53,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-15 23:43:53,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:43:53,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 23:43:53,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:43:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 23:43:53,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:43:53,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545453880] [2023-02-15 23:43:53,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545453880] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:43:53,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343288452] [2023-02-15 23:43:53,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:43:53,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:43:53,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:43:53,061 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:43:53,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 23:43:53,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:43:53,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 23:43:53,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:43:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-15 23:43:53,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:43:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 23:43:53,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343288452] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:43:53,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:43:53,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2023-02-15 23:43:53,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452921217] [2023-02-15 23:43:53,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:43:53,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 23:43:53,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:43:53,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 23:43:53,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-15 23:43:53,299 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 23:43:53,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:43:53,360 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2023-02-15 23:43:53,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 23:43:53,361 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2023-02-15 23:43:53,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:43:53,363 INFO L225 Difference]: With dead ends: 49 [2023-02-15 23:43:53,363 INFO L226 Difference]: Without dead ends: 29 [2023-02-15 23:43:53,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-02-15 23:43:53,366 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:43:53,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 65 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:43:53,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-15 23:43:53,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2023-02-15 23:43:53,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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) [2023-02-15 23:43:53,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-02-15 23:43:53,371 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 39 [2023-02-15 23:43:53,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:43:53,371 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-02-15 23:43:53,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 23:43:53,372 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-02-15 23:43:53,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 23:43:53,373 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:43:53,373 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:43:53,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 23:43:53,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:43:53,579 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:43:53,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:43:53,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1089239822, now seen corresponding path program 2 times [2023-02-15 23:43:53,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:43:53,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835515975] [2023-02-15 23:43:53,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:43:53,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:43:53,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:43:54,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 23:43:54,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:43:54,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 23:43:54,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:43:54,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-15 23:43:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:43:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 48 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 23:43:54,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:43:54,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835515975] [2023-02-15 23:43:54,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835515975] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:43:54,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580353064] [2023-02-15 23:43:54,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 23:43:54,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:43:54,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:43:54,724 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:43:54,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 23:43:54,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 23:43:54,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:43:54,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-15 23:43:54,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:43:55,159 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 23:43:55,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:43:55,509 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 23:43:55,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580353064] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:43:55,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:43:55,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2023-02-15 23:43:55,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514373702] [2023-02-15 23:43:55,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:43:55,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 23:43:55,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:43:55,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 23:43:55,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-15 23:43:55,513 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 23:43:55,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:43:55,677 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2023-02-15 23:43:55,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 23:43:55,677 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2023-02-15 23:43:55,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:43:55,682 INFO L225 Difference]: With dead ends: 73 [2023-02-15 23:43:55,682 INFO L226 Difference]: Without dead ends: 69 [2023-02-15 23:43:55,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 83 SyntacticMatches, 18 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2023-02-15 23:43:55,683 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 31 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 23:43:55,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 478 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 23:43:55,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-15 23:43:55,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 49. [2023-02-15 23:43:55,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 42 states have internal predecessors, (52), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-02-15 23:43:55,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2023-02-15 23:43:55,714 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 48 [2023-02-15 23:43:55,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:43:55,715 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2023-02-15 23:43:55,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 23:43:55,715 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2023-02-15 23:43:55,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 23:43:55,716 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:43:55,716 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:43:55,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 23:43:55,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:43:55,922 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:43:55,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:43:55,923 INFO L85 PathProgramCache]: Analyzing trace with hash -409181452, now seen corresponding path program 1 times [2023-02-15 23:43:55,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:43:55,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391475061] [2023-02-15 23:43:55,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:43:55,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:43:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:43:56,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 23:43:56,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:43:56,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 23:43:56,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:43:56,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-15 23:43:56,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:43:56,995 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 47 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 23:43:56,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:43:56,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391475061] [2023-02-15 23:43:56,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391475061] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:43:56,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585859979] [2023-02-15 23:43:56,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:43:56,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:43:56,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:43:56,997 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:43:57,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 23:43:57,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:43:57,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-15 23:43:57,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:43:57,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 23:43:57,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-02-15 23:43:57,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-02-15 23:43:57,654 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 69 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 23:43:57,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:43:57,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-02-15 23:43:57,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-02-15 23:43:58,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2023-02-15 23:43:58,289 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 67 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 23:43:58,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585859979] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:43:58,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:43:58,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 19] total 44 [2023-02-15 23:43:58,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309568043] [2023-02-15 23:43:58,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:43:58,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-15 23:43:58,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:43:58,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-15 23:43:58,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1638, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 23:43:58,292 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 44 states, 40 states have (on average 2.525) internal successors, (101), 42 states have internal predecessors, (101), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2023-02-15 23:44:01,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:44:01,062 INFO L93 Difference]: Finished difference Result 309 states and 458 transitions. [2023-02-15 23:44:01,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-02-15 23:44:01,062 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 40 states have (on average 2.525) internal successors, (101), 42 states have internal predecessors, (101), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) Word has length 48 [2023-02-15 23:44:01,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:44:01,065 INFO L225 Difference]: With dead ends: 309 [2023-02-15 23:44:01,065 INFO L226 Difference]: Without dead ends: 268 [2023-02-15 23:44:01,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 85 SyntacticMatches, 6 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3088 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1599, Invalid=9113, Unknown=0, NotChecked=0, Total=10712 [2023-02-15 23:44:01,070 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 391 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-15 23:44:01,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 404 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-15 23:44:01,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2023-02-15 23:44:01,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 187. [2023-02-15 23:44:01,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 162 states have (on average 1.3395061728395061) internal successors, (217), 168 states have internal predecessors, (217), 13 states have call successors, (13), 5 states have call predecessors, (13), 11 states have return successors, (55), 13 states have call predecessors, (55), 13 states have call successors, (55) [2023-02-15 23:44:01,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 285 transitions. [2023-02-15 23:44:01,112 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 285 transitions. Word has length 48 [2023-02-15 23:44:01,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:44:01,112 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 285 transitions. [2023-02-15 23:44:01,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 40 states have (on average 2.525) internal successors, (101), 42 states have internal predecessors, (101), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2023-02-15 23:44:01,113 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 285 transitions. [2023-02-15 23:44:01,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 23:44:01,121 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:44:01,121 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:44:01,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-15 23:44:01,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:44:01,327 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:44:01,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:44:01,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1360360308, now seen corresponding path program 2 times [2023-02-15 23:44:01,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:44:01,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630930262] [2023-02-15 23:44:01,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:44:01,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:44:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:01,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 23:44:01,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:01,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 23:44:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:02,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-15 23:44:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:44:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 23:44:02,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:44:02,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630930262] [2023-02-15 23:44:02,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630930262] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:44:02,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568041636] [2023-02-15 23:44:02,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 23:44:02,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:44:02,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:44:02,013 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:44:02,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 23:44:02,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 23:44:02,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:44:02,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-15 23:44:02,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:44:02,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 23:44:02,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2023-02-15 23:44:02,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-02-15 23:44:02,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-02-15 23:44:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 73 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 23:44:09,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:44:09,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-02-15 23:44:09,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2023-02-15 23:44:09,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 29 [2023-02-15 23:44:14,086 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 23:44:14,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 35 [2023-02-15 23:44:14,214 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 47 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 23:44:14,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568041636] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:44:14,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:44:14,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 17] total 46 [2023-02-15 23:44:14,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496143925] [2023-02-15 23:44:14,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:44:14,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-15 23:44:14,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:44:14,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-15 23:44:14,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1846, Unknown=4, NotChecked=0, Total=2070 [2023-02-15 23:44:14,217 INFO L87 Difference]: Start difference. First operand 187 states and 285 transitions. Second operand has 46 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 42 states have internal predecessors, (100), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 23:44:26,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:44:32,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:44:34,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:44:40,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:44:42,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:44:47,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:44:50,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:44:52,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:44:54,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:44:58,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:45:00,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:45:03,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:45:05,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:45:09,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:45:11,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:45:13,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:45:15,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:45:30,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:45:32,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:45:34,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:45:36,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:45:38,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:45:40,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:45:40,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:45:40,434 INFO L93 Difference]: Finished difference Result 710 states and 1000 transitions. [2023-02-15 23:45:40,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2023-02-15 23:45:40,435 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 42 states have internal predecessors, (100), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) Word has length 48 [2023-02-15 23:45:40,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:45:40,438 INFO L225 Difference]: With dead ends: 710 [2023-02-15 23:45:40,438 INFO L226 Difference]: Without dead ends: 482 [2023-02-15 23:45:40,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 7181 ImplicationChecksByTransitivity, 46.2s TimeCoverageRelationStatistics Valid=2217, Invalid=18082, Unknown=7, NotChecked=0, Total=20306 [2023-02-15 23:45:40,445 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 531 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 1813 mSolverCounterSat, 180 mSolverCounterUnsat, 25 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 2018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1813 IncrementalHoareTripleChecker+Invalid, 25 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.3s IncrementalHoareTripleChecker+Time [2023-02-15 23:45:40,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 687 Invalid, 2018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1813 Invalid, 25 Unknown, 0 Unchecked, 51.3s Time] [2023-02-15 23:45:40,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2023-02-15 23:45:40,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 331. [2023-02-15 23:45:40,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 287 states have (on average 1.3101045296167246) internal successors, (376), 303 states have internal predecessors, (376), 17 states have call successors, (17), 10 states have call predecessors, (17), 26 states have return successors, (71), 17 states have call predecessors, (71), 17 states have call successors, (71) [2023-02-15 23:45:40,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 464 transitions. [2023-02-15 23:45:40,512 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 464 transitions. Word has length 48 [2023-02-15 23:45:40,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:45:40,512 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 464 transitions. [2023-02-15 23:45:40,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 42 states have internal predecessors, (100), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 23:45:40,512 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 464 transitions. [2023-02-15 23:45:40,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 23:45:40,514 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:45:40,514 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:45:40,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 23:45:40,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:45:40,724 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:45:40,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:45:40,725 INFO L85 PathProgramCache]: Analyzing trace with hash -868345224, now seen corresponding path program 3 times [2023-02-15 23:45:40,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:45:40,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913778636] [2023-02-15 23:45:40,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:45:40,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:45:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:45:41,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 23:45:41,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:45:41,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 23:45:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:45:41,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-15 23:45:41,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:45:41,387 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 23:45:41,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:45:41,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913778636] [2023-02-15 23:45:41,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913778636] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:45:41,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513268907] [2023-02-15 23:45:41,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 23:45:41,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:45:41,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:45:41,390 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:45:41,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 23:45:41,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-15 23:45:41,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:45:41,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-15 23:45:41,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:45:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-15 23:45:41,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:45:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-15 23:45:41,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513268907] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:45:41,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:45:41,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2023-02-15 23:45:41,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285301858] [2023-02-15 23:45:41,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:45:41,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 23:45:41,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:45:41,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 23:45:41,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-15 23:45:41,943 INFO L87 Difference]: Start difference. First operand 331 states and 464 transitions. Second operand has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 23:45:42,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:45:42,143 INFO L93 Difference]: Finished difference Result 599 states and 940 transitions. [2023-02-15 23:45:42,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 23:45:42,144 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2023-02-15 23:45:42,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:45:42,151 INFO L225 Difference]: With dead ends: 599 [2023-02-15 23:45:42,151 INFO L226 Difference]: Without dead ends: 595 [2023-02-15 23:45:42,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 79 SyntacticMatches, 22 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2023-02-15 23:45:42,153 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 21 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 23:45:42,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 653 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 23:45:42,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2023-02-15 23:45:42,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 467. [2023-02-15 23:45:42,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 409 states have (on average 1.3643031784841075) internal successors, (558), 433 states have internal predecessors, (558), 23 states have call successors, (23), 10 states have call predecessors, (23), 34 states have return successors, (119), 23 states have call predecessors, (119), 23 states have call successors, (119) [2023-02-15 23:45:42,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 700 transitions. [2023-02-15 23:45:42,242 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 700 transitions. Word has length 48 [2023-02-15 23:45:42,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:45:42,242 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 700 transitions. [2023-02-15 23:45:42,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 23:45:42,243 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 700 transitions. [2023-02-15 23:45:42,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 23:45:42,245 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:45:42,245 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:45:42,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 23:45:42,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:45:42,455 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:45:42,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:45:42,455 INFO L85 PathProgramCache]: Analyzing trace with hash -610179786, now seen corresponding path program 4 times [2023-02-15 23:45:42,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:45:42,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596425807] [2023-02-15 23:45:42,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:45:42,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:45:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:45:43,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 23:45:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:45:43,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 23:45:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:45:43,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-15 23:45:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:45:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 9 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 23:45:43,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:45:43,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596425807] [2023-02-15 23:45:43,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596425807] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:45:43,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550952533] [2023-02-15 23:45:43,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 23:45:43,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:45:43,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:45:43,558 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:45:43,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 23:45:43,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 23:45:43,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:45:43,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-15 23:45:43,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:45:43,938 INFO L321 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2023-02-15 23:45:43,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-02-15 23:45:44,118 INFO L321 Elim1Store]: treesize reduction 125, result has 10.7 percent of original size [2023-02-15 23:45:44,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 35 [2023-02-15 23:45:44,527 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 23:45:44,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:45:45,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2023-02-15 23:45:45,019 INFO L321 Elim1Store]: treesize reduction 5, result has 78.3 percent of original size [2023-02-15 23:45:45,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 95 [2023-02-15 23:45:45,267 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 23:45:45,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 50 [2023-02-15 23:45:45,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-02-15 23:45:45,303 INFO L321 Elim1Store]: treesize reduction 12, result has 71.4 percent of original size [2023-02-15 23:45:45,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 101 [2023-02-15 23:45:45,578 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 23:45:45,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550952533] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:45:45,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:45:45,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 19] total 54 [2023-02-15 23:45:45,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197193388] [2023-02-15 23:45:45,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:45:45,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-15 23:45:45,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:45:45,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-15 23:45:45,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=2548, Unknown=0, NotChecked=0, Total=2862 [2023-02-15 23:45:45,581 INFO L87 Difference]: Start difference. First operand 467 states and 700 transitions. Second operand has 54 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 52 states have internal predecessors, (107), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 23:45:50,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:45:52,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-02-15 23:45:55,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:45:57,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:45:59,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-02-15 23:46:01,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:46:03,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:46:04,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:46:04,318 INFO L93 Difference]: Finished difference Result 689 states and 994 transitions. [2023-02-15 23:46:04,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-02-15 23:46:04,319 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 52 states have internal predecessors, (107), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 48 [2023-02-15 23:46:04,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:46:04,322 INFO L225 Difference]: With dead ends: 689 [2023-02-15 23:46:04,322 INFO L226 Difference]: Without dead ends: 663 [2023-02-15 23:46:04,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 5746 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1909, Invalid=13591, Unknown=0, NotChecked=0, Total=15500 [2023-02-15 23:46:04,327 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 346 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 108 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 1373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2023-02-15 23:46:04,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 534 Invalid, 1373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1258 Invalid, 7 Unknown, 0 Unchecked, 15.2s Time] [2023-02-15 23:46:04,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2023-02-15 23:46:04,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 552. [2023-02-15 23:46:04,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 485 states have (on average 1.377319587628866) internal successors, (668), 516 states have internal predecessors, (668), 24 states have call successors, (24), 11 states have call predecessors, (24), 42 states have return successors, (129), 24 states have call predecessors, (129), 24 states have call successors, (129) [2023-02-15 23:46:04,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 821 transitions. [2023-02-15 23:46:04,394 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 821 transitions. Word has length 48 [2023-02-15 23:46:04,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:46:04,395 INFO L495 AbstractCegarLoop]: Abstraction has 552 states and 821 transitions. [2023-02-15 23:46:04,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 52 states have internal predecessors, (107), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 23:46:04,395 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 821 transitions. [2023-02-15 23:46:04,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 23:46:04,398 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:46:04,398 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:46:04,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 23:46:04,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-02-15 23:46:04,603 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:46:04,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:46:04,603 INFO L85 PathProgramCache]: Analyzing trace with hash -841093328, now seen corresponding path program 5 times [2023-02-15 23:46:04,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:46:04,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273506393] [2023-02-15 23:46:04,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:46:04,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:46:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:46:04,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 23:46:04,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:46:05,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 23:46:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:46:05,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-15 23:46:05,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:46:05,308 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 1 proven. 69 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 23:46:05,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:46:05,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273506393] [2023-02-15 23:46:05,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273506393] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:46:05,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674601584] [2023-02-15 23:46:05,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 23:46:05,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:46:05,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:46:05,310 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:46:05,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 23:46:05,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-15 23:46:05,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:46:05,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-15 23:46:05,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:46:05,729 INFO L321 Elim1Store]: treesize reduction 46, result has 37.8 percent of original size [2023-02-15 23:46:05,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 50 [2023-02-15 23:46:16,483 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 23:46:16,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:46:17,082 INFO L321 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2023-02-15 23:46:17,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2023-02-15 23:46:17,121 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 67 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 23:46:17,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674601584] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:46:17,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:46:17,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 39 [2023-02-15 23:46:17,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447060719] [2023-02-15 23:46:17,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:46:17,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-15 23:46:17,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:46:17,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-15 23:46:17,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1332, Unknown=2, NotChecked=0, Total=1482 [2023-02-15 23:46:17,124 INFO L87 Difference]: Start difference. First operand 552 states and 821 transitions. Second operand has 39 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 35 states have internal predecessors, (89), 6 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-15 23:46:21,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:46:23,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:46:29,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:46:33,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:46:35,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:46:37,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:46:39,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:46:41,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:46:43,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 23:47:06,673 WARN L233 SmtUtils]: Spent 18.08s on a formula simplification. DAG size of input: 94 DAG size of output: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 23:47:24,875 WARN L233 SmtUtils]: Spent 18.14s on a formula simplification. DAG size of input: 84 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 23:47:31,084 WARN L233 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 89 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 23:47:37,268 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 89 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 23:48:13,795 WARN L233 SmtUtils]: Spent 18.16s on a formula simplification. DAG size of input: 104 DAG size of output: 102 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)