./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de61.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/in-de61.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 49b7efdcf8f4d6c873493bd370328870547a88b20d287c5de5342268b0966917 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 00:36:27,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 00:36:27,064 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 00:36:27,091 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 00:36:27,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 00:36:27,094 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 00:36:27,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 00:36:27,097 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 00:36:27,098 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 00:36:27,101 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 00:36:27,102 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 00:36:27,104 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 00:36:27,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 00:36:27,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 00:36:27,107 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 00:36:27,108 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 00:36:27,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 00:36:27,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 00:36:27,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 00:36:27,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 00:36:27,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 00:36:27,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 00:36:27,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 00:36:27,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 00:36:27,120 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 00:36:27,120 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 00:36:27,120 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 00:36:27,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 00:36:27,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 00:36:27,123 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 00:36:27,123 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 00:36:27,124 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 00:36:27,125 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 00:36:27,125 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 00:36:27,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 00:36:27,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 00:36:27,126 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 00:36:27,127 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 00:36:27,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 00:36:27,128 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 00:36:27,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 00:36:27,129 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 00:36:27,155 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 00:36:27,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 00:36:27,156 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 00:36:27,156 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 00:36:27,157 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 00:36:27,157 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 00:36:27,157 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 00:36:27,157 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 00:36:27,157 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 00:36:27,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 00:36:27,158 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 00:36:27,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 00:36:27,158 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 00:36:27,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 00:36:27,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 00:36:27,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 00:36:27,159 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 00:36:27,159 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 00:36:27,159 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 00:36:27,159 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 00:36:27,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 00:36:27,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 00:36:27,160 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 00:36:27,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 00:36:27,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 00:36:27,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 00:36:27,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 00:36:27,161 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 00:36:27,161 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 00:36:27,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 00:36:27,161 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 00:36:27,161 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 00:36:27,161 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 00:36:27,162 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 00:36:27,167 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 00:36:27,167 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 49b7efdcf8f4d6c873493bd370328870547a88b20d287c5de5342268b0966917 [2023-02-18 00:36:27,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 00:36:27,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 00:36:27,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 00:36:27,381 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 00:36:27,381 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 00:36:27,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de61.c [2023-02-18 00:36:28,322 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 00:36:28,475 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 00:36:28,475 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de61.c [2023-02-18 00:36:28,478 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/835603d21/46e39b87636b45948b9436866b27e048/FLAGa182624d4 [2023-02-18 00:36:28,487 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/835603d21/46e39b87636b45948b9436866b27e048 [2023-02-18 00:36:28,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 00:36:28,489 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 00:36:28,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 00:36:28,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 00:36:28,492 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 00:36:28,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 12:36:28" (1/1) ... [2023-02-18 00:36:28,493 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e232411 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:36:28, skipping insertion in model container [2023-02-18 00:36:28,493 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 12:36:28" (1/1) ... [2023-02-18 00:36:28,498 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 00:36:28,508 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 00:36:28,589 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de61.c[368,381] [2023-02-18 00:36:28,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 00:36:28,603 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 00:36:28,610 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de61.c[368,381] [2023-02-18 00:36:28,613 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 00:36:28,621 INFO L208 MainTranslator]: Completed translation [2023-02-18 00:36:28,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:36:28 WrapperNode [2023-02-18 00:36:28,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 00:36:28,622 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 00:36:28,622 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 00:36:28,622 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 00:36:28,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:36:28" (1/1) ... [2023-02-18 00:36:28,630 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:36:28" (1/1) ... [2023-02-18 00:36:28,640 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2023-02-18 00:36:28,640 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 00:36:28,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 00:36:28,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 00:36:28,641 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 00:36:28,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:36:28" (1/1) ... [2023-02-18 00:36:28,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:36:28" (1/1) ... [2023-02-18 00:36:28,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:36:28" (1/1) ... [2023-02-18 00:36:28,651 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:36:28" (1/1) ... [2023-02-18 00:36:28,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:36:28" (1/1) ... [2023-02-18 00:36:28,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:36:28" (1/1) ... [2023-02-18 00:36:28,657 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:36:28" (1/1) ... [2023-02-18 00:36:28,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:36:28" (1/1) ... [2023-02-18 00:36:28,658 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 00:36:28,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 00:36:28,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 00:36:28,659 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 00:36:28,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:36:28" (1/1) ... [2023-02-18 00:36:28,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 00:36:28,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:36:28,687 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) [2023-02-18 00:36:28,689 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 [2023-02-18 00:36:28,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 00:36:28,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 00:36:28,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 00:36:28,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 00:36:28,765 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 00:36:28,767 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 00:36:28,917 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 00:36:28,924 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 00:36:28,924 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2023-02-18 00:36:28,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 12:36:28 BoogieIcfgContainer [2023-02-18 00:36:28,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 00:36:28,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 00:36:28,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 00:36:28,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 00:36:28,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 12:36:28" (1/3) ... [2023-02-18 00:36:28,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57172be4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 12:36:28, skipping insertion in model container [2023-02-18 00:36:28,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:36:28" (2/3) ... [2023-02-18 00:36:28,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57172be4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 12:36:28, skipping insertion in model container [2023-02-18 00:36:28,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 12:36:28" (3/3) ... [2023-02-18 00:36:28,936 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de61.c [2023-02-18 00:36:28,949 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 00:36:28,949 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 00:36:28,994 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 00:36:29,001 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;@e2a6aa5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 00:36:29,001 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 00:36:29,004 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:29,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 00:36:29,009 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:29,010 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:29,010 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:29,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:29,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1928996963, now seen corresponding path program 1 times [2023-02-18 00:36:29,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:29,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485367800] [2023-02-18 00:36:29,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:29,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:36:29,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:29,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485367800] [2023-02-18 00:36:29,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485367800] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 00:36:29,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 00:36:29,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 00:36:29,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409518422] [2023-02-18 00:36:29,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 00:36:29,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 00:36:29,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:29,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 00:36:29,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 00:36:29,187 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:29,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:29,197 INFO L93 Difference]: Finished difference Result 31 states and 53 transitions. [2023-02-18 00:36:29,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 00:36:29,199 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-18 00:36:29,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:29,203 INFO L225 Difference]: With dead ends: 31 [2023-02-18 00:36:29,203 INFO L226 Difference]: Without dead ends: 13 [2023-02-18 00:36:29,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 00:36:29,207 INFO L413 NwaCegarLoop]: 22 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, 22 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 [2023-02-18 00:36:29,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:36:29,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-02-18 00:36:29,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-02-18 00:36:29,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:29,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2023-02-18 00:36:29,225 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 12 [2023-02-18 00:36:29,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:29,225 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 18 transitions. [2023-02-18 00:36:29,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:29,226 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 18 transitions. [2023-02-18 00:36:29,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 00:36:29,226 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:29,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:29,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 00:36:29,226 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:29,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:29,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1814480359, now seen corresponding path program 1 times [2023-02-18 00:36:29,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:29,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778955823] [2023-02-18 00:36:29,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:29,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:36:29,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:29,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778955823] [2023-02-18 00:36:29,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778955823] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 00:36:29,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 00:36:29,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 00:36:29,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304948028] [2023-02-18 00:36:29,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 00:36:29,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 00:36:29,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:29,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 00:36:29,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-18 00:36:29,573 INFO L87 Difference]: Start difference. First operand 13 states and 18 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:29,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:29,700 INFO L93 Difference]: Finished difference Result 31 states and 46 transitions. [2023-02-18 00:36:29,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 00:36:29,701 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-18 00:36:29,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:29,701 INFO L225 Difference]: With dead ends: 31 [2023-02-18 00:36:29,701 INFO L226 Difference]: Without dead ends: 14 [2023-02-18 00:36:29,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-18 00:36:29,703 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:29,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 39 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:36:29,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-02-18 00:36:29,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-02-18 00:36:29,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:29,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2023-02-18 00:36:29,706 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 12 [2023-02-18 00:36:29,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:29,706 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2023-02-18 00:36:29,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:29,707 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2023-02-18 00:36:29,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-18 00:36:29,707 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:29,707 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:29,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 00:36:29,708 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:29,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:29,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1427170164, now seen corresponding path program 1 times [2023-02-18 00:36:29,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:29,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493307171] [2023-02-18 00:36:29,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:29,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:29,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:36:29,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:29,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493307171] [2023-02-18 00:36:29,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493307171] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:36:29,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806413296] [2023-02-18 00:36:29,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:29,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:29,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:36:29,777 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) [2023-02-18 00:36:29,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 00:36:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:29,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 00:36:29,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:36:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:36:29,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:36:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:36:29,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806413296] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:36:29,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:36:29,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-02-18 00:36:29,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638056383] [2023-02-18 00:36:29,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:36:29,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 00:36:29,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:29,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 00:36:29,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-18 00:36:29,885 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:30,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:30,012 INFO L93 Difference]: Finished difference Result 58 states and 94 transitions. [2023-02-18 00:36:30,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 00:36:30,012 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-18 00:36:30,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:30,014 INFO L225 Difference]: With dead ends: 58 [2023-02-18 00:36:30,015 INFO L226 Difference]: Without dead ends: 50 [2023-02-18 00:36:30,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-02-18 00:36:30,018 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 41 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:30,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 62 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:36:30,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-18 00:36:30,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2023-02-18 00:36:30,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:30,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 55 transitions. [2023-02-18 00:36:30,036 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 55 transitions. Word has length 13 [2023-02-18 00:36:30,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:30,037 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 55 transitions. [2023-02-18 00:36:30,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:30,037 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 55 transitions. [2023-02-18 00:36:30,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 00:36:30,038 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:30,039 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:30,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 00:36:30,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:30,244 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:30,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:30,245 INFO L85 PathProgramCache]: Analyzing trace with hash -603304611, now seen corresponding path program 1 times [2023-02-18 00:36:30,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:30,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322558909] [2023-02-18 00:36:30,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:30,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:36:30,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:30,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322558909] [2023-02-18 00:36:30,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322558909] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:36:30,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875448560] [2023-02-18 00:36:30,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:30,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:30,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:36:30,339 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) [2023-02-18 00:36:30,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 00:36:30,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:30,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 00:36:30,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:36:30,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 00:36:30,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:36:30,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 00:36:30,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875448560] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:36:30,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:36:30,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 9 [2023-02-18 00:36:30,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984605929] [2023-02-18 00:36:30,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:36:30,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 00:36:30,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:30,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 00:36:30,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-18 00:36:30,402 INFO L87 Difference]: Start difference. First operand 37 states and 55 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:30,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:30,541 INFO L93 Difference]: Finished difference Result 96 states and 138 transitions. [2023-02-18 00:36:30,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 00:36:30,542 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-18 00:36:30,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:30,544 INFO L225 Difference]: With dead ends: 96 [2023-02-18 00:36:30,544 INFO L226 Difference]: Without dead ends: 76 [2023-02-18 00:36:30,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-02-18 00:36:30,546 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:30,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 86 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:36:30,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-18 00:36:30,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 47. [2023-02-18 00:36:30,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.4782608695652173) internal successors, (68), 46 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:30,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 68 transitions. [2023-02-18 00:36:30,561 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 68 transitions. Word has length 15 [2023-02-18 00:36:30,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:30,562 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 68 transitions. [2023-02-18 00:36:30,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:30,562 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 68 transitions. [2023-02-18 00:36:30,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 00:36:30,563 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:30,563 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:30,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-18 00:36:30,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-02-18 00:36:30,770 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:30,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:30,770 INFO L85 PathProgramCache]: Analyzing trace with hash 114935591, now seen corresponding path program 2 times [2023-02-18 00:36:30,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:30,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971617202] [2023-02-18 00:36:30,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:30,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:30,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:36:30,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:30,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971617202] [2023-02-18 00:36:30,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971617202] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:36:30,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014237261] [2023-02-18 00:36:30,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:36:30,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:30,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:36:30,842 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) [2023-02-18 00:36:30,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 00:36:30,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:36:30,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:36:30,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 00:36:30,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:36:30,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:36:30,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:36:30,969 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:36:30,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014237261] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:36:30,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:36:30,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-02-18 00:36:30,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896489947] [2023-02-18 00:36:30,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:36:30,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 00:36:30,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:30,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 00:36:30,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-02-18 00:36:30,971 INFO L87 Difference]: Start difference. First operand 47 states and 68 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:31,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:31,442 INFO L93 Difference]: Finished difference Result 181 states and 303 transitions. [2023-02-18 00:36:31,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-18 00:36:31,442 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-18 00:36:31,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:31,443 INFO L225 Difference]: With dead ends: 181 [2023-02-18 00:36:31,443 INFO L226 Difference]: Without dead ends: 167 [2023-02-18 00:36:31,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2023-02-18 00:36:31,444 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 263 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:31,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 206 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:36:31,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-02-18 00:36:31,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 100. [2023-02-18 00:36:31,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.5252525252525253) internal successors, (151), 99 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:31,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 151 transitions. [2023-02-18 00:36:31,457 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 151 transitions. Word has length 16 [2023-02-18 00:36:31,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:31,457 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 151 transitions. [2023-02-18 00:36:31,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:31,457 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 151 transitions. [2023-02-18 00:36:31,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 00:36:31,458 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:31,458 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:31,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 00:36:31,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:31,667 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:31,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:31,668 INFO L85 PathProgramCache]: Analyzing trace with hash 188466470, now seen corresponding path program 1 times [2023-02-18 00:36:31,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:31,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448866816] [2023-02-18 00:36:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:31,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:31,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:31,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 00:36:31,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:31,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448866816] [2023-02-18 00:36:31,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448866816] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:36:31,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153453149] [2023-02-18 00:36:31,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:31,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:31,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:36:31,880 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) [2023-02-18 00:36:31,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 00:36:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:31,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-18 00:36:31,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:36:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:36:32,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:36:32,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 00:36:32,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153453149] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:36:32,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:36:32,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 24 [2023-02-18 00:36:32,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860101171] [2023-02-18 00:36:32,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:36:32,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 00:36:32,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:32,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 00:36:32,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2023-02-18 00:36:32,293 INFO L87 Difference]: Start difference. First operand 100 states and 151 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:33,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:33,374 INFO L93 Difference]: Finished difference Result 229 states and 330 transitions. [2023-02-18 00:36:33,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-18 00:36:33,375 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-18 00:36:33,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:33,376 INFO L225 Difference]: With dead ends: 229 [2023-02-18 00:36:33,376 INFO L226 Difference]: Without dead ends: 200 [2023-02-18 00:36:33,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=398, Invalid=1582, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 00:36:33,377 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:33,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 110 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 00:36:33,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-02-18 00:36:33,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 119. [2023-02-18 00:36:33,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.5423728813559323) internal successors, (182), 118 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:33,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 182 transitions. [2023-02-18 00:36:33,412 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 182 transitions. Word has length 18 [2023-02-18 00:36:33,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:33,413 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 182 transitions. [2023-02-18 00:36:33,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:33,413 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 182 transitions. [2023-02-18 00:36:33,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 00:36:33,413 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:33,414 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:33,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-18 00:36:33,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:33,620 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:33,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:33,621 INFO L85 PathProgramCache]: Analyzing trace with hash 748617255, now seen corresponding path program 2 times [2023-02-18 00:36:33,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:33,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229501330] [2023-02-18 00:36:33,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:33,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:33,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:36:33,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:33,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229501330] [2023-02-18 00:36:33,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229501330] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:36:33,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252236872] [2023-02-18 00:36:33,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:36:33,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:33,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:36:33,678 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) [2023-02-18 00:36:33,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 00:36:33,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:36:33,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:36:33,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 00:36:33,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:36:33,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 00:36:33,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:36:33,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 00:36:33,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252236872] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:36:33,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:36:33,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2023-02-18 00:36:33,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12901257] [2023-02-18 00:36:33,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:36:33,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 00:36:33,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:33,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 00:36:33,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-02-18 00:36:33,736 INFO L87 Difference]: Start difference. First operand 119 states and 182 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:34,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:34,186 INFO L93 Difference]: Finished difference Result 341 states and 489 transitions. [2023-02-18 00:36:34,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-18 00:36:34,186 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-18 00:36:34,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:34,187 INFO L225 Difference]: With dead ends: 341 [2023-02-18 00:36:34,187 INFO L226 Difference]: Without dead ends: 301 [2023-02-18 00:36:34,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=1553, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 00:36:34,188 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 201 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:34,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 122 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:36:34,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-02-18 00:36:34,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 150. [2023-02-18 00:36:34,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.5100671140939597) internal successors, (225), 149 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:34,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 225 transitions. [2023-02-18 00:36:34,215 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 225 transitions. Word has length 18 [2023-02-18 00:36:34,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:34,216 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 225 transitions. [2023-02-18 00:36:34,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:34,216 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 225 transitions. [2023-02-18 00:36:34,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 00:36:34,217 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:34,217 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:34,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 00:36:34,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:34,422 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:34,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:34,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1346970424, now seen corresponding path program 2 times [2023-02-18 00:36:34,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:34,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221855443] [2023-02-18 00:36:34,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:34,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:34,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 00:36:34,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:34,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221855443] [2023-02-18 00:36:34,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221855443] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:36:34,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79020216] [2023-02-18 00:36:34,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:36:34,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:34,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:36:34,472 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) [2023-02-18 00:36:34,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 00:36:34,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:36:34,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:36:34,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 00:36:34,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:36:34,513 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 00:36:34,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:36:34,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 00:36:34,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79020216] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:36:34,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:36:34,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-02-18 00:36:34,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317120751] [2023-02-18 00:36:34,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:36:34,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 00:36:34,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:34,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 00:36:34,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 00:36:34,525 INFO L87 Difference]: Start difference. First operand 150 states and 225 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:34,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:34,580 INFO L93 Difference]: Finished difference Result 245 states and 367 transitions. [2023-02-18 00:36:34,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 00:36:34,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-18 00:36:34,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:34,581 INFO L225 Difference]: With dead ends: 245 [2023-02-18 00:36:34,581 INFO L226 Difference]: Without dead ends: 183 [2023-02-18 00:36:34,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 7 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 00:36:34,582 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:34,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 54 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:36:34,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-02-18 00:36:34,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 147. [2023-02-18 00:36:34,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.4794520547945205) internal successors, (216), 146 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:34,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 216 transitions. [2023-02-18 00:36:34,614 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 216 transitions. Word has length 20 [2023-02-18 00:36:34,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:34,614 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 216 transitions. [2023-02-18 00:36:34,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:34,615 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 216 transitions. [2023-02-18 00:36:34,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-18 00:36:34,615 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:34,615 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:34,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 00:36:34,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:34,820 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:34,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:34,820 INFO L85 PathProgramCache]: Analyzing trace with hash 48319293, now seen corresponding path program 1 times [2023-02-18 00:36:34,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:34,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081713618] [2023-02-18 00:36:34,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:34,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 00:36:34,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:34,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081713618] [2023-02-18 00:36:34,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081713618] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:36:34,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371278640] [2023-02-18 00:36:34,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:34,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:34,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:36:34,865 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) [2023-02-18 00:36:34,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 00:36:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:34,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 00:36:34,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:36:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 00:36:34,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:36:34,941 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 00:36:34,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371278640] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:36:34,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:36:34,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 14 [2023-02-18 00:36:34,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631255898] [2023-02-18 00:36:34,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:36:34,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 00:36:34,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:34,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 00:36:34,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-02-18 00:36:34,943 INFO L87 Difference]: Start difference. First operand 147 states and 216 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:35,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:35,172 INFO L93 Difference]: Finished difference Result 235 states and 339 transitions. [2023-02-18 00:36:35,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 00:36:35,173 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-18 00:36:35,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:35,174 INFO L225 Difference]: With dead ends: 235 [2023-02-18 00:36:35,174 INFO L226 Difference]: Without dead ends: 186 [2023-02-18 00:36:35,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-02-18 00:36:35,174 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 66 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:35,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 137 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:36:35,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-02-18 00:36:35,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 143. [2023-02-18 00:36:35,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.4859154929577465) internal successors, (211), 142 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:35,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 211 transitions. [2023-02-18 00:36:35,198 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 211 transitions. Word has length 21 [2023-02-18 00:36:35,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:35,199 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 211 transitions. [2023-02-18 00:36:35,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:35,199 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 211 transitions. [2023-02-18 00:36:35,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-18 00:36:35,199 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:35,199 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:35,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-18 00:36:35,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:35,404 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:35,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:35,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1411583389, now seen corresponding path program 3 times [2023-02-18 00:36:35,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:35,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982314708] [2023-02-18 00:36:35,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:35,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:35,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:35,497 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:36:35,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:35,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982314708] [2023-02-18 00:36:35,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982314708] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:36:35,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157933583] [2023-02-18 00:36:35,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:36:35,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:35,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:36:35,499 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) [2023-02-18 00:36:35,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 00:36:35,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 00:36:35,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:36:35,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 00:36:35,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:36:35,574 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 00:36:35,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:36:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 00:36:35,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157933583] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:36:35,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:36:35,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2023-02-18 00:36:35,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424206353] [2023-02-18 00:36:35,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:36:35,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 00:36:35,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:35,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 00:36:35,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2023-02-18 00:36:35,581 INFO L87 Difference]: Start difference. First operand 143 states and 211 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:36,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:36,577 INFO L93 Difference]: Finished difference Result 414 states and 573 transitions. [2023-02-18 00:36:36,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-02-18 00:36:36,577 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-18 00:36:36,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:36,579 INFO L225 Difference]: With dead ends: 414 [2023-02-18 00:36:36,579 INFO L226 Difference]: Without dead ends: 378 [2023-02-18 00:36:36,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=524, Invalid=4446, Unknown=0, NotChecked=0, Total=4970 [2023-02-18 00:36:36,581 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 282 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:36,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 232 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 00:36:36,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2023-02-18 00:36:36,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 167. [2023-02-18 00:36:36,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.4879518072289157) internal successors, (247), 166 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:36,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 247 transitions. [2023-02-18 00:36:36,613 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 247 transitions. Word has length 21 [2023-02-18 00:36:36,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:36,613 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 247 transitions. [2023-02-18 00:36:36,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:36,613 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 247 transitions. [2023-02-18 00:36:36,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-18 00:36:36,614 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:36,614 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:36,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 00:36:36,817 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,SelfDestructingSolverStorable9 [2023-02-18 00:36:36,817 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:36,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:36,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1195101891, now seen corresponding path program 2 times [2023-02-18 00:36:36,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:36,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063882138] [2023-02-18 00:36:36,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:36,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 00:36:36,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:36,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063882138] [2023-02-18 00:36:36,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063882138] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:36:36,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407481364] [2023-02-18 00:36:36,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:36:36,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:36,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:36:36,909 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) [2023-02-18 00:36:36,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 00:36:36,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:36:36,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:36:36,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 00:36:36,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:36:36,989 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 00:36:36,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:36:37,006 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-18 00:36:37,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407481364] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:36:37,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:36:37,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 4] total 13 [2023-02-18 00:36:37,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067692147] [2023-02-18 00:36:37,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:36:37,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 00:36:37,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:37,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 00:36:37,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-02-18 00:36:37,008 INFO L87 Difference]: Start difference. First operand 167 states and 247 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:37,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:37,462 INFO L93 Difference]: Finished difference Result 311 states and 463 transitions. [2023-02-18 00:36:37,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-18 00:36:37,463 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-18 00:36:37,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:37,463 INFO L225 Difference]: With dead ends: 311 [2023-02-18 00:36:37,464 INFO L226 Difference]: Without dead ends: 285 [2023-02-18 00:36:37,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2023-02-18 00:36:37,464 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 72 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:37,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 254 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 00:36:37,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2023-02-18 00:36:37,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 211. [2023-02-18 00:36:37,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.4714285714285715) internal successors, (309), 210 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:37,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 309 transitions. [2023-02-18 00:36:37,503 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 309 transitions. Word has length 21 [2023-02-18 00:36:37,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:37,503 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 309 transitions. [2023-02-18 00:36:37,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:37,503 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 309 transitions. [2023-02-18 00:36:37,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 00:36:37,504 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:37,504 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:37,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 00:36:37,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:37,705 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:37,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:37,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1372519271, now seen corresponding path program 3 times [2023-02-18 00:36:37,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:37,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720088398] [2023-02-18 00:36:37,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:37,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:37,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 00:36:37,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:37,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720088398] [2023-02-18 00:36:37,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720088398] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:36:37,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674849907] [2023-02-18 00:36:37,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:36:37,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:37,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:36:37,749 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:36:37,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 00:36:37,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-18 00:36:37,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:36:37,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 00:36:37,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:36:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 00:36:37,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:36:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 00:36:37,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674849907] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:36:37,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:36:37,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-02-18 00:36:37,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836866088] [2023-02-18 00:36:37,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:36:37,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 00:36:37,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:37,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 00:36:37,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 00:36:37,833 INFO L87 Difference]: Start difference. First operand 211 states and 309 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:37,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:37,940 INFO L93 Difference]: Finished difference Result 320 states and 450 transitions. [2023-02-18 00:36:37,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 00:36:37,940 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-18 00:36:37,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:37,942 INFO L225 Difference]: With dead ends: 320 [2023-02-18 00:36:37,942 INFO L226 Difference]: Without dead ends: 308 [2023-02-18 00:36:37,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 10 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-18 00:36:37,942 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 30 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:37,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 74 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:36:37,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2023-02-18 00:36:38,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 228. [2023-02-18 00:36:38,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.4449339207048457) internal successors, (328), 227 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:38,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 328 transitions. [2023-02-18 00:36:38,002 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 328 transitions. Word has length 22 [2023-02-18 00:36:38,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:38,002 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 328 transitions. [2023-02-18 00:36:38,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:38,003 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 328 transitions. [2023-02-18 00:36:38,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 00:36:38,003 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:38,003 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:38,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 00:36:38,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-18 00:36:38,208 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:38,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:38,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1486463737, now seen corresponding path program 3 times [2023-02-18 00:36:38,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:38,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828586815] [2023-02-18 00:36:38,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:38,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:38,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:38,320 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:36:38,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:38,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828586815] [2023-02-18 00:36:38,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828586815] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:36:38,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310829613] [2023-02-18 00:36:38,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:36:38,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:38,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:36:38,331 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:36:38,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 00:36:38,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-18 00:36:38,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:36:38,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-18 00:36:38,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:36:38,433 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:36:38,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:36:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:36:38,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310829613] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:36:38,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:36:38,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2023-02-18 00:36:38,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117585892] [2023-02-18 00:36:38,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:36:38,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 00:36:38,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:38,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 00:36:38,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2023-02-18 00:36:38,610 INFO L87 Difference]: Start difference. First operand 228 states and 328 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:44,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:44,997 INFO L93 Difference]: Finished difference Result 808 states and 1306 transitions. [2023-02-18 00:36:44,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-18 00:36:44,998 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-18 00:36:44,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:45,000 INFO L225 Difference]: With dead ends: 808 [2023-02-18 00:36:45,000 INFO L226 Difference]: Without dead ends: 736 [2023-02-18 00:36:45,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 21 SyntacticMatches, 11 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1363, Invalid=3059, Unknown=0, NotChecked=0, Total=4422 [2023-02-18 00:36:45,002 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 1196 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 643 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1196 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 1468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 643 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:45,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1196 Valid, 651 Invalid, 1468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [643 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-18 00:36:45,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2023-02-18 00:36:45,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 347. [2023-02-18 00:36:45,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.5057803468208093) internal successors, (521), 346 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:45,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 521 transitions. [2023-02-18 00:36:45,075 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 521 transitions. Word has length 22 [2023-02-18 00:36:45,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:45,075 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 521 transitions. [2023-02-18 00:36:45,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:45,076 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 521 transitions. [2023-02-18 00:36:45,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 00:36:45,076 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:45,076 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:45,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 00:36:45,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-18 00:36:45,281 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:45,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:45,281 INFO L85 PathProgramCache]: Analyzing trace with hash -11866489, now seen corresponding path program 4 times [2023-02-18 00:36:45,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:45,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874576467] [2023-02-18 00:36:45,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:45,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:45,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 00:36:45,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:45,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874576467] [2023-02-18 00:36:45,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874576467] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:36:45,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59885040] [2023-02-18 00:36:45,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:36:45,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:45,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:36:45,557 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:36:45,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 00:36:45,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:36:45,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:36:45,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-18 00:36:45,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:36:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 00:36:45,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:36:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 00:36:46,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59885040] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:36:46,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:36:46,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 23 [2023-02-18 00:36:46,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095673058] [2023-02-18 00:36:46,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:36:46,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 00:36:46,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:46,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 00:36:46,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2023-02-18 00:36:46,406 INFO L87 Difference]: Start difference. First operand 347 states and 521 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:48,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:48,681 INFO L93 Difference]: Finished difference Result 519 states and 710 transitions. [2023-02-18 00:36:48,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-18 00:36:48,682 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-18 00:36:48,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:48,685 INFO L225 Difference]: With dead ends: 519 [2023-02-18 00:36:48,685 INFO L226 Difference]: Without dead ends: 507 [2023-02-18 00:36:48,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 13 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=394, Invalid=2468, Unknown=0, NotChecked=0, Total=2862 [2023-02-18 00:36:48,687 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 105 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:48,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 206 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 00:36:48,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2023-02-18 00:36:48,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 357. [2023-02-18 00:36:48,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 1.497191011235955) internal successors, (533), 356 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:48,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 533 transitions. [2023-02-18 00:36:48,811 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 533 transitions. Word has length 24 [2023-02-18 00:36:48,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:48,812 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 533 transitions. [2023-02-18 00:36:48,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:48,812 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 533 transitions. [2023-02-18 00:36:48,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 00:36:48,812 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:48,813 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:48,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 00:36:49,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-18 00:36:49,017 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:49,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:49,017 INFO L85 PathProgramCache]: Analyzing trace with hash -147642777, now seen corresponding path program 4 times [2023-02-18 00:36:49,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:49,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66847047] [2023-02-18 00:36:49,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:49,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:49,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:36:49,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:49,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66847047] [2023-02-18 00:36:49,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66847047] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:36:49,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864300489] [2023-02-18 00:36:49,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:36:49,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:49,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:36:49,114 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:36:49,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 00:36:49,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:36:49,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:36:49,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 00:36:49,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:36:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 00:36:49,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:36:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 00:36:49,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864300489] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:36:49,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:36:49,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2023-02-18 00:36:49,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614433727] [2023-02-18 00:36:49,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:36:49,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 00:36:49,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:49,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 00:36:49,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2023-02-18 00:36:49,215 INFO L87 Difference]: Start difference. First operand 357 states and 533 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:52,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:52,119 INFO L93 Difference]: Finished difference Result 1013 states and 1397 transitions. [2023-02-18 00:36:52,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2023-02-18 00:36:52,119 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-18 00:36:52,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:52,122 INFO L225 Difference]: With dead ends: 1013 [2023-02-18 00:36:52,122 INFO L226 Difference]: Without dead ends: 939 [2023-02-18 00:36:52,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5751 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1243, Invalid=14507, Unknown=0, NotChecked=0, Total=15750 [2023-02-18 00:36:52,125 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 588 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 1386 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 1386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:52,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 330 Invalid, 1728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 1386 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-18 00:36:52,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2023-02-18 00:36:52,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 405. [2023-02-18 00:36:52,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 1.504950495049505) internal successors, (608), 404 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:52,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 608 transitions. [2023-02-18 00:36:52,256 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 608 transitions. Word has length 24 [2023-02-18 00:36:52,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:52,256 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 608 transitions. [2023-02-18 00:36:52,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:52,256 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 608 transitions. [2023-02-18 00:36:52,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 00:36:52,257 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:52,257 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:52,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 00:36:52,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-18 00:36:52,462 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:52,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:52,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1118410521, now seen corresponding path program 5 times [2023-02-18 00:36:52,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:52,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524548971] [2023-02-18 00:36:52,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:52,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:52,526 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 00:36:52,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:52,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524548971] [2023-02-18 00:36:52,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524548971] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:36:52,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423895349] [2023-02-18 00:36:52,526 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:36:52,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:52,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:36:52,528 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:36:52,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 00:36:52,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-02-18 00:36:52,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:36:52,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 00:36:52,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:36:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 00:36:52,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:36:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 00:36:52,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423895349] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:36:52,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:36:52,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-02-18 00:36:52,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30222684] [2023-02-18 00:36:52,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:36:52,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 00:36:52,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:52,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 00:36:52,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 00:36:52,632 INFO L87 Difference]: Start difference. First operand 405 states and 608 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:52,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:52,911 INFO L93 Difference]: Finished difference Result 639 states and 942 transitions. [2023-02-18 00:36:52,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 00:36:52,912 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-18 00:36:52,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:52,913 INFO L225 Difference]: With dead ends: 639 [2023-02-18 00:36:52,913 INFO L226 Difference]: Without dead ends: 502 [2023-02-18 00:36:52,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 11 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 00:36:52,914 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 24 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:52,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 119 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:36:52,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2023-02-18 00:36:53,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 373. [2023-02-18 00:36:53,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 1.4919354838709677) internal successors, (555), 372 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:53,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 555 transitions. [2023-02-18 00:36:53,039 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 555 transitions. Word has length 26 [2023-02-18 00:36:53,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:53,039 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 555 transitions. [2023-02-18 00:36:53,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:53,039 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 555 transitions. [2023-02-18 00:36:53,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 00:36:53,040 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:53,040 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:53,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 00:36:53,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:53,241 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:53,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:53,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1999602746, now seen corresponding path program 6 times [2023-02-18 00:36:53,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:53,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263639327] [2023-02-18 00:36:53,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:53,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-18 00:36:53,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:53,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263639327] [2023-02-18 00:36:53,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263639327] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:36:53,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406867156] [2023-02-18 00:36:53,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:36:53,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:53,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:36:53,325 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:36:53,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 00:36:53,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-02-18 00:36:53,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:36:53,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 00:36:53,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:36:53,399 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-18 00:36:53,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:36:53,425 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-18 00:36:53,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406867156] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:36:53,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:36:53,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 12 [2023-02-18 00:36:53,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651460112] [2023-02-18 00:36:53,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:36:53,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 00:36:53,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:53,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 00:36:53,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-18 00:36:53,428 INFO L87 Difference]: Start difference. First operand 373 states and 555 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:53,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:53,796 INFO L93 Difference]: Finished difference Result 623 states and 895 transitions. [2023-02-18 00:36:53,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 00:36:53,796 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-18 00:36:53,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:53,798 INFO L225 Difference]: With dead ends: 623 [2023-02-18 00:36:53,798 INFO L226 Difference]: Without dead ends: 593 [2023-02-18 00:36:53,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-02-18 00:36:53,798 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 125 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:53,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 159 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:36:53,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2023-02-18 00:36:53,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 399. [2023-02-18 00:36:53,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 1.4597989949748744) internal successors, (581), 398 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:53,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 581 transitions. [2023-02-18 00:36:53,944 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 581 transitions. Word has length 26 [2023-02-18 00:36:53,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:53,944 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 581 transitions. [2023-02-18 00:36:53,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:53,944 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 581 transitions. [2023-02-18 00:36:53,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 00:36:53,945 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:53,945 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:53,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-18 00:36:54,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-18 00:36:54,149 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:54,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:54,150 INFO L85 PathProgramCache]: Analyzing trace with hash -833380899, now seen corresponding path program 5 times [2023-02-18 00:36:54,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:54,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582185660] [2023-02-18 00:36:54,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:54,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:54,281 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:36:54,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:54,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582185660] [2023-02-18 00:36:54,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582185660] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:36:54,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970330871] [2023-02-18 00:36:54,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:36:54,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:54,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:36:54,283 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:36:54,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 00:36:54,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-18 00:36:54,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:36:54,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 00:36:54,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:36:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:36:54,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:36:54,668 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 00:36:54,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970330871] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:36:54,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:36:54,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 13] total 32 [2023-02-18 00:36:54,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939123075] [2023-02-18 00:36:54,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:36:54,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-18 00:36:54,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:54,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-18 00:36:54,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=776, Unknown=0, NotChecked=0, Total=992 [2023-02-18 00:36:54,670 INFO L87 Difference]: Start difference. First operand 399 states and 581 transitions. Second operand has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:57,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:36:57,380 INFO L93 Difference]: Finished difference Result 1091 states and 1555 transitions. [2023-02-18 00:36:57,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-02-18 00:36:57,380 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-18 00:36:57,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:36:57,382 INFO L225 Difference]: With dead ends: 1091 [2023-02-18 00:36:57,383 INFO L226 Difference]: Without dead ends: 1014 [2023-02-18 00:36:57,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 32 SyntacticMatches, 10 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2432 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1869, Invalid=6141, Unknown=0, NotChecked=0, Total=8010 [2023-02-18 00:36:57,384 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 608 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 1633 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 1986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 1633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:36:57,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 470 Invalid, 1986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 1633 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-18 00:36:57,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2023-02-18 00:36:57,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 471. [2023-02-18 00:36:57,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.474468085106383) internal successors, (693), 470 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:57,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 693 transitions. [2023-02-18 00:36:57,585 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 693 transitions. Word has length 27 [2023-02-18 00:36:57,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:36:57,585 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 693 transitions. [2023-02-18 00:36:57,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:36:57,586 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 693 transitions. [2023-02-18 00:36:57,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 00:36:57,586 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:36:57,586 INFO L195 NwaCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:36:57,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-18 00:36:57,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-18 00:36:57,791 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:36:57,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:36:57,791 INFO L85 PathProgramCache]: Analyzing trace with hash 83199046, now seen corresponding path program 7 times [2023-02-18 00:36:57,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:36:57,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160924783] [2023-02-18 00:36:57,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:36:57,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:36:57,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:57,927 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 00:36:57,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:36:57,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160924783] [2023-02-18 00:36:57,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160924783] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:36:57,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846080740] [2023-02-18 00:36:57,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:36:57,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:36:57,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:36:57,941 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:36:57,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-18 00:36:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:36:57,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-18 00:36:57,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:36:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 00:36:58,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:36:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 00:36:58,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846080740] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:36:58,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:36:58,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2023-02-18 00:36:58,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534539267] [2023-02-18 00:36:58,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:36:58,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-18 00:36:58,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:36:58,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-18 00:36:58,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=721, Unknown=0, NotChecked=0, Total=930 [2023-02-18 00:36:58,275 INFO L87 Difference]: Start difference. First operand 471 states and 693 transitions. Second operand has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:33,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:37:33,528 INFO L93 Difference]: Finished difference Result 1242 states and 1950 transitions. [2023-02-18 00:37:33,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2023-02-18 00:37:33,529 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-18 00:37:33,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:37:33,531 INFO L225 Difference]: With dead ends: 1242 [2023-02-18 00:37:33,531 INFO L226 Difference]: Without dead ends: 1108 [2023-02-18 00:37:33,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 30 SyntacticMatches, 12 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6738 ImplicationChecksByTransitivity, 31.2s TimeCoverageRelationStatistics Valid=4719, Invalid=13103, Unknown=0, NotChecked=0, Total=17822 [2023-02-18 00:37:33,535 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 1737 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 1055 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1737 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 2261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1055 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-02-18 00:37:33,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1737 Valid, 793 Invalid, 2261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1055 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-02-18 00:37:33,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2023-02-18 00:37:33,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 528. [2023-02-18 00:37:33,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 1.4705882352941178) internal successors, (775), 527 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:33,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 775 transitions. [2023-02-18 00:37:33,772 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 775 transitions. Word has length 28 [2023-02-18 00:37:33,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:37:33,772 INFO L495 AbstractCegarLoop]: Abstraction has 528 states and 775 transitions. [2023-02-18 00:37:33,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:33,773 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 775 transitions. [2023-02-18 00:37:33,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 00:37:33,773 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:37:33,773 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:37:33,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-02-18 00:37:33,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:33,974 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:37:33,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:37:33,974 INFO L85 PathProgramCache]: Analyzing trace with hash 796082573, now seen corresponding path program 6 times [2023-02-18 00:37:33,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:37:33,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003971441] [2023-02-18 00:37:33,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:37:33,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:37:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:37:34,137 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 00:37:34,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:37:34,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003971441] [2023-02-18 00:37:34,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003971441] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:37:34,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807523746] [2023-02-18 00:37:34,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:37:34,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:34,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:37:34,153 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:37:34,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-18 00:37:34,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-18 00:37:34,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:37:34,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 00:37:34,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:37:34,289 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-18 00:37:34,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:37:34,292 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-18 00:37:34,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807523746] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:37:34,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:37:34,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 21 [2023-02-18 00:37:34,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724680080] [2023-02-18 00:37:34,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:37:34,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 00:37:34,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:37:34,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 00:37:34,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2023-02-18 00:37:34,293 INFO L87 Difference]: Start difference. First operand 528 states and 775 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:38,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:37:38,071 INFO L93 Difference]: Finished difference Result 1143 states and 1615 transitions. [2023-02-18 00:37:38,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-02-18 00:37:38,071 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-18 00:37:38,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:37:38,074 INFO L225 Difference]: With dead ends: 1143 [2023-02-18 00:37:38,074 INFO L226 Difference]: Without dead ends: 1039 [2023-02-18 00:37:38,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2930 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=989, Invalid=8517, Unknown=0, NotChecked=0, Total=9506 [2023-02-18 00:37:38,075 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 519 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:37:38,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 410 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-18 00:37:38,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2023-02-18 00:37:38,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 557. [2023-02-18 00:37:38,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 1.4676258992805755) internal successors, (816), 556 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:38,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 816 transitions. [2023-02-18 00:37:38,329 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 816 transitions. Word has length 29 [2023-02-18 00:37:38,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:37:38,329 INFO L495 AbstractCegarLoop]: Abstraction has 557 states and 816 transitions. [2023-02-18 00:37:38,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:38,330 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 816 transitions. [2023-02-18 00:37:38,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 00:37:38,330 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:37:38,330 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:37:38,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-18 00:37:38,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:38,535 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:37:38,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:37:38,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1004492410, now seen corresponding path program 8 times [2023-02-18 00:37:38,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:37:38,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998733747] [2023-02-18 00:37:38,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:37:38,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:37:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:37:38,812 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 00:37:38,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:37:38,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998733747] [2023-02-18 00:37:38,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998733747] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:37:38,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249463439] [2023-02-18 00:37:38,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:37:38,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:38,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:37:38,813 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:37:38,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-18 00:37:38,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:37:38,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:37:38,888 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-18 00:37:38,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:37:39,458 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:37:39,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:37:40,921 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:37:40,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249463439] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:37:40,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:37:40,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 24, 20] total 46 [2023-02-18 00:37:40,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354527169] [2023-02-18 00:37:40,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:37:40,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-18 00:37:40,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:37:40,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-18 00:37:40,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1824, Unknown=0, NotChecked=0, Total=2070 [2023-02-18 00:37:40,923 INFO L87 Difference]: Start difference. First operand 557 states and 816 transitions. Second operand has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 46 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:49,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:37:49,956 INFO L93 Difference]: Finished difference Result 782 states and 1090 transitions. [2023-02-18 00:37:49,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-18 00:37:49,956 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 46 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-02-18 00:37:49,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:37:49,958 INFO L225 Difference]: With dead ends: 782 [2023-02-18 00:37:49,958 INFO L226 Difference]: Without dead ends: 674 [2023-02-18 00:37:49,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 25 SyntacticMatches, 10 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=802, Invalid=4600, Unknown=0, NotChecked=0, Total=5402 [2023-02-18 00:37:49,959 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 195 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:37:49,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 108 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-02-18 00:37:49,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2023-02-18 00:37:50,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 523. [2023-02-18 00:37:50,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 1.4540229885057472) internal successors, (759), 522 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:50,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 759 transitions. [2023-02-18 00:37:50,293 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 759 transitions. Word has length 30 [2023-02-18 00:37:50,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:37:50,294 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 759 transitions. [2023-02-18 00:37:50,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 46 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:37:50,294 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 759 transitions. [2023-02-18 00:37:50,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 00:37:50,294 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:37:50,295 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:37:50,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-18 00:37:50,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:50,499 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:37:50,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:37:50,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1893940903, now seen corresponding path program 7 times [2023-02-18 00:37:50,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:37:50,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517582845] [2023-02-18 00:37:50,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:37:50,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:37:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:37:50,684 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:37:50,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:37:50,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517582845] [2023-02-18 00:37:50,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517582845] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:37:50,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347029773] [2023-02-18 00:37:50,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:37:50,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:37:50,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:37:50,686 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:37:50,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-18 00:37:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:37:50,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 00:37:50,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:37:50,855 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 00:37:50,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:37:50,858 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 00:37:50,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347029773] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:37:50,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:37:50,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 24 [2023-02-18 00:37:50,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103816802] [2023-02-18 00:37:50,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:37:50,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 00:37:50,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:37:50,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 00:37:50,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2023-02-18 00:37:50,859 INFO L87 Difference]: Start difference. First operand 523 states and 759 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:38:05,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:38:05,085 INFO L93 Difference]: Finished difference Result 1502 states and 2059 transitions. [2023-02-18 00:38:05,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2023-02-18 00:38:05,085 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-02-18 00:38:05,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:38:05,088 INFO L225 Difference]: With dead ends: 1502 [2023-02-18 00:38:05,088 INFO L226 Difference]: Without dead ends: 1432 [2023-02-18 00:38:05,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23391 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=3138, Invalid=54702, Unknown=0, NotChecked=0, Total=57840 [2023-02-18 00:38:05,091 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 909 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 3187 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 3817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 3187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-02-18 00:38:05,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 571 Invalid, 3817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 3187 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-02-18 00:38:05,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2023-02-18 00:38:05,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 577. [2023-02-18 00:38:05,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 1.4652777777777777) internal successors, (844), 576 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:38:05,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 844 transitions. [2023-02-18 00:38:05,543 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 844 transitions. Word has length 30 [2023-02-18 00:38:05,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:38:05,543 INFO L495 AbstractCegarLoop]: Abstraction has 577 states and 844 transitions. [2023-02-18 00:38:05,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:38:05,543 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 844 transitions. [2023-02-18 00:38:05,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 00:38:05,544 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:38:05,544 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:38:05,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-18 00:38:05,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-02-18 00:38:05,748 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:38:05,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:38:05,748 INFO L85 PathProgramCache]: Analyzing trace with hash 380203431, now seen corresponding path program 9 times [2023-02-18 00:38:05,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:38:05,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477716375] [2023-02-18 00:38:05,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:38:05,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:38:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:38:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-18 00:38:05,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:38:05,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477716375] [2023-02-18 00:38:05,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477716375] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:38:05,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195476906] [2023-02-18 00:38:05,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:38:05,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:38:05,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:38:05,826 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:38:05,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-18 00:38:05,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 00:38:05,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:38:05,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 00:38:05,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:38:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-18 00:38:05,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:38:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-18 00:38:05,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195476906] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:38:05,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:38:05,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2023-02-18 00:38:05,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184274394] [2023-02-18 00:38:05,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:38:05,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 00:38:05,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:38:05,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 00:38:05,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-02-18 00:38:05,936 INFO L87 Difference]: Start difference. First operand 577 states and 844 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:38:07,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:38:07,820 INFO L93 Difference]: Finished difference Result 1314 states and 1906 transitions. [2023-02-18 00:38:07,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 00:38:07,821 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-18 00:38:07,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:38:07,823 INFO L225 Difference]: With dead ends: 1314 [2023-02-18 00:38:07,823 INFO L226 Difference]: Without dead ends: 1132 [2023-02-18 00:38:07,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2023-02-18 00:38:07,824 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 345 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 00:38:07,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 199 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 00:38:07,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2023-02-18 00:38:08,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 626. [2023-02-18 00:38:08,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 1.4688) internal successors, (918), 625 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:38:08,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 918 transitions. [2023-02-18 00:38:08,286 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 918 transitions. Word has length 32 [2023-02-18 00:38:08,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:38:08,287 INFO L495 AbstractCegarLoop]: Abstraction has 626 states and 918 transitions. [2023-02-18 00:38:08,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:38:08,287 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 918 transitions. [2023-02-18 00:38:08,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 00:38:08,288 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:38:08,288 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:38:08,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-02-18 00:38:08,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-02-18 00:38:08,492 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:38:08,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:38:08,493 INFO L85 PathProgramCache]: Analyzing trace with hash -404867559, now seen corresponding path program 3 times [2023-02-18 00:38:08,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:38:08,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631002697] [2023-02-18 00:38:08,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:38:08,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:38:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:38:08,592 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-18 00:38:08,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:38:08,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631002697] [2023-02-18 00:38:08,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631002697] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:38:08,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861223815] [2023-02-18 00:38:08,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:38:08,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:38:08,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:38:08,594 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:38:08,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-18 00:38:08,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 00:38:08,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:38:08,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 00:38:08,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:38:08,742 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-18 00:38:08,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:38:08,799 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-18 00:38:08,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861223815] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:38:08,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:38:08,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 22 [2023-02-18 00:38:08,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198440341] [2023-02-18 00:38:08,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:38:08,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 00:38:08,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:38:08,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 00:38:08,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2023-02-18 00:38:08,800 INFO L87 Difference]: Start difference. First operand 626 states and 918 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:38:10,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:38:10,897 INFO L93 Difference]: Finished difference Result 899 states and 1254 transitions. [2023-02-18 00:38:10,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-02-18 00:38:10,898 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-18 00:38:10,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:38:10,899 INFO L225 Difference]: With dead ends: 899 [2023-02-18 00:38:10,899 INFO L226 Difference]: Without dead ends: 759 [2023-02-18 00:38:10,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=451, Invalid=4519, Unknown=0, NotChecked=0, Total=4970 [2023-02-18 00:38:10,900 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 144 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 1244 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 00:38:10,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 505 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1244 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 00:38:10,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2023-02-18 00:38:11,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 608. [2023-02-18 00:38:11,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 1.4514003294892917) internal successors, (881), 607 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:38:11,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 881 transitions. [2023-02-18 00:38:11,381 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 881 transitions. Word has length 32 [2023-02-18 00:38:11,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:38:11,381 INFO L495 AbstractCegarLoop]: Abstraction has 608 states and 881 transitions. [2023-02-18 00:38:11,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:38:11,381 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 881 transitions. [2023-02-18 00:38:11,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-18 00:38:11,382 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:38:11,382 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:38:11,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-18 00:38:11,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:38:11,586 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:38:11,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:38:11,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1620848866, now seen corresponding path program 10 times [2023-02-18 00:38:11,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:38:11,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284629167] [2023-02-18 00:38:11,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:38:11,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:38:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:38:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 00:38:11,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:38:11,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284629167] [2023-02-18 00:38:11,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284629167] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:38:11,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957015206] [2023-02-18 00:38:11,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:38:11,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:38:11,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:38:11,756 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:38:11,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-18 00:38:11,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:38:11,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:38:11,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-18 00:38:11,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:38:11,954 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 00:38:11,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:38:12,006 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-02-18 00:38:12,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957015206] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:38:12,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:38:12,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 5] total 24 [2023-02-18 00:38:12,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202275997] [2023-02-18 00:38:12,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:38:12,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 00:38:12,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:38:12,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 00:38:12,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2023-02-18 00:38:12,007 INFO L87 Difference]: Start difference. First operand 608 states and 881 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:38:14,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:38:14,721 INFO L93 Difference]: Finished difference Result 1094 states and 1590 transitions. [2023-02-18 00:38:14,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-02-18 00:38:14,722 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-18 00:38:14,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:38:14,724 INFO L225 Difference]: With dead ends: 1094 [2023-02-18 00:38:14,724 INFO L226 Difference]: Without dead ends: 999 [2023-02-18 00:38:14,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 55 SyntacticMatches, 15 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2805 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=578, Invalid=8542, Unknown=0, NotChecked=0, Total=9120 [2023-02-18 00:38:14,725 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 145 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 2288 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 2484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 2288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-18 00:38:14,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 735 Invalid, 2484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 2288 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-18 00:38:14,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2023-02-18 00:38:15,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 727. [2023-02-18 00:38:15,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 1.4311294765840221) internal successors, (1039), 726 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:38:15,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 1039 transitions. [2023-02-18 00:38:15,249 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 1039 transitions. Word has length 33 [2023-02-18 00:38:15,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:38:15,249 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 1039 transitions. [2023-02-18 00:38:15,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:38:15,249 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 1039 transitions. [2023-02-18 00:38:15,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 00:38:15,250 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:38:15,250 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:38:15,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-02-18 00:38:15,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:38:15,453 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:38:15,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:38:15,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1111633127, now seen corresponding path program 8 times [2023-02-18 00:38:15,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:38:15,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143055964] [2023-02-18 00:38:15,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:38:15,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:38:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:38:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-18 00:38:15,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:38:15,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143055964] [2023-02-18 00:38:15,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143055964] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:38:15,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996290471] [2023-02-18 00:38:15,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:38:15,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:38:15,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:38:15,646 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:38:15,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-18 00:38:15,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:38:15,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:38:15,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-18 00:38:15,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:38:15,848 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-18 00:38:15,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:38:16,244 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-18 00:38:16,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996290471] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:38:16,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:38:16,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 42 [2023-02-18 00:38:16,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429572062] [2023-02-18 00:38:16,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:38:16,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-18 00:38:16,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:38:16,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-18 00:38:16,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2023-02-18 00:38:16,246 INFO L87 Difference]: Start difference. First operand 727 states and 1039 transitions. Second operand has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:38:33,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:38:33,533 INFO L93 Difference]: Finished difference Result 1599 states and 2272 transitions. [2023-02-18 00:38:33,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2023-02-18 00:38:33,533 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-02-18 00:38:33,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:38:33,536 INFO L225 Difference]: With dead ends: 1599 [2023-02-18 00:38:33,536 INFO L226 Difference]: Without dead ends: 1452 [2023-02-18 00:38:33,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16220 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=5209, Invalid=39523, Unknown=0, NotChecked=0, Total=44732 [2023-02-18 00:38:33,539 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 1071 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 3564 mSolverCounterSat, 1212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 4776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1212 IncrementalHoareTripleChecker+Valid, 3564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:38:33,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1071 Valid, 871 Invalid, 4776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1212 Valid, 3564 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-02-18 00:38:33,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2023-02-18 00:38:34,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 1002. [2023-02-18 00:38:34,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 1001 states have (on average 1.4355644355644355) internal successors, (1437), 1001 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:38:34,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1437 transitions. [2023-02-18 00:38:34,439 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1437 transitions. Word has length 34 [2023-02-18 00:38:34,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:38:34,439 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 1437 transitions. [2023-02-18 00:38:34,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:38:34,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1437 transitions. [2023-02-18 00:38:34,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 00:38:34,441 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:38:34,441 INFO L195 NwaCegarLoop]: trace histogram [13, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:38:34,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-18 00:38:34,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-18 00:38:34,646 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:38:34,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:38:34,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1635545740, now seen corresponding path program 11 times [2023-02-18 00:38:34,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:38:34,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496545742] [2023-02-18 00:38:34,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:38:34,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:38:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:38:34,824 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 00:38:34,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:38:34,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496545742] [2023-02-18 00:38:34,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496545742] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:38:34,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101402914] [2023-02-18 00:38:34,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:38:34,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:38:34,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:38:34,826 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:38:34,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-18 00:38:35,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-18 00:38:35,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:38:35,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-18 00:38:35,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:38:35,180 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 00:38:35,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:38:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 00:38:35,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101402914] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:38:35,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:38:35,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2023-02-18 00:38:35,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318311231] [2023-02-18 00:38:35,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:38:35,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-18 00:38:35,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:38:35,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-18 00:38:35,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1053, Unknown=0, NotChecked=0, Total=1332 [2023-02-18 00:38:35,581 INFO L87 Difference]: Start difference. First operand 1002 states and 1437 transitions. Second operand has 37 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 37 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:41:19,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 00:41:20,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 00:41:30,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:41:30,834 INFO L93 Difference]: Finished difference Result 2347 states and 3579 transitions. [2023-02-18 00:41:30,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2023-02-18 00:41:30,834 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 37 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-18 00:41:30,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:41:30,839 INFO L225 Difference]: With dead ends: 2347 [2023-02-18 00:41:30,839 INFO L226 Difference]: Without dead ends: 2090 [2023-02-18 00:41:30,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 38 SyntacticMatches, 15 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24153 ImplicationChecksByTransitivity, 153.3s TimeCoverageRelationStatistics Valid=12771, Invalid=46033, Unknown=2, NotChecked=0, Total=58806 [2023-02-18 00:41:30,841 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 2219 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 1957 mSolverCounterSat, 1591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2219 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 3548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1591 IncrementalHoareTripleChecker+Valid, 1957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.3s IncrementalHoareTripleChecker+Time [2023-02-18 00:41:30,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2219 Valid, 1094 Invalid, 3548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1591 Valid, 1957 Invalid, 0 Unknown, 0 Unchecked, 20.3s Time] [2023-02-18 00:41:30,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2023-02-18 00:41:31,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 1000. [2023-02-18 00:41:31,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 999 states have (on average 1.4584584584584586) internal successors, (1457), 999 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:41:31,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1457 transitions. [2023-02-18 00:41:31,791 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1457 transitions. Word has length 35 [2023-02-18 00:41:31,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:41:31,791 INFO L495 AbstractCegarLoop]: Abstraction has 1000 states and 1457 transitions. [2023-02-18 00:41:31,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 37 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:41:31,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1457 transitions. [2023-02-18 00:41:31,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 00:41:31,792 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:41:31,793 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:41:31,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-18 00:41:31,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-18 00:41:31,998 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:41:31,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:41:31,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1563221799, now seen corresponding path program 12 times [2023-02-18 00:41:31,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:41:31,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695786222] [2023-02-18 00:41:31,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:41:31,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:41:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:41:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 00:41:32,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:41:32,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695786222] [2023-02-18 00:41:32,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695786222] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:41:32,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511075304] [2023-02-18 00:41:32,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:41:32,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:41:32,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:41:32,361 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:41:32,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-18 00:41:32,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-02-18 00:41:32,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:41:32,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-18 00:41:32,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:41:32,938 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 00:41:32,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:41:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 00:41:34,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511075304] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:41:34,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:41:34,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 19] total 39 [2023-02-18 00:41:34,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181532143] [2023-02-18 00:41:34,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:41:34,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-18 00:41:34,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:41:34,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-18 00:41:34,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1311, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 00:41:34,421 INFO L87 Difference]: Start difference. First operand 1000 states and 1457 transitions. Second operand has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 39 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:41:43,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:41:43,630 INFO L93 Difference]: Finished difference Result 1306 states and 1828 transitions. [2023-02-18 00:41:43,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-02-18 00:41:43,630 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 39 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-18 00:41:43,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:41:43,633 INFO L225 Difference]: With dead ends: 1306 [2023-02-18 00:41:43,633 INFO L226 Difference]: Without dead ends: 1274 [2023-02-18 00:41:43,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 36 SyntacticMatches, 23 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=659, Invalid=5821, Unknown=0, NotChecked=0, Total=6480 [2023-02-18 00:41:43,634 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 176 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:41:43,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 255 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-02-18 00:41:43,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2023-02-18 00:41:44,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1047. [2023-02-18 00:41:44,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 1.4560229445506692) internal successors, (1523), 1046 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:41:44,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1523 transitions. [2023-02-18 00:41:44,763 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1523 transitions. Word has length 36 [2023-02-18 00:41:44,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:41:44,763 INFO L495 AbstractCegarLoop]: Abstraction has 1047 states and 1523 transitions. [2023-02-18 00:41:44,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 39 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:41:44,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1523 transitions. [2023-02-18 00:41:44,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 00:41:44,764 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:41:44,764 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:41:44,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-18 00:41:44,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-18 00:41:44,969 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:41:44,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:41:44,970 INFO L85 PathProgramCache]: Analyzing trace with hash 61818599, now seen corresponding path program 9 times [2023-02-18 00:41:44,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:41:44,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139715637] [2023-02-18 00:41:44,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:41:44,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:41:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:41:45,215 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:41:45,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:41:45,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139715637] [2023-02-18 00:41:45,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139715637] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:41:45,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333988438] [2023-02-18 00:41:45,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:41:45,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:41:45,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:41:45,217 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:41:45,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-18 00:41:45,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-18 00:41:45,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:41:45,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-18 00:41:45,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:41:45,521 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 00:41:45,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:41:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 00:41:45,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333988438] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:41:45,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:41:45,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 11] total 30 [2023-02-18 00:41:45,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435653972] [2023-02-18 00:41:45,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:41:45,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-18 00:41:45,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:41:45,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-18 00:41:45,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2023-02-18 00:41:45,527 INFO L87 Difference]: Start difference. First operand 1047 states and 1523 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:42:45,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:42:45,113 INFO L93 Difference]: Finished difference Result 3111 states and 4194 transitions. [2023-02-18 00:42:45,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 398 states. [2023-02-18 00:42:45,113 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-18 00:42:45,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:42:45,120 INFO L225 Difference]: With dead ends: 3111 [2023-02-18 00:42:45,120 INFO L226 Difference]: Without dead ends: 2973 [2023-02-18 00:42:45,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 421 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77040 ImplicationChecksByTransitivity, 42.0s TimeCoverageRelationStatistics Valid=7079, Invalid=171427, Unknown=0, NotChecked=0, Total=178506 [2023-02-18 00:42:45,128 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 1444 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 5891 mSolverCounterSat, 1091 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1444 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 6982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1091 IncrementalHoareTripleChecker+Valid, 5891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:42:45,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1444 Valid, 818 Invalid, 6982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1091 Valid, 5891 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time] [2023-02-18 00:42:45,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2973 states. [2023-02-18 00:42:46,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2973 to 1056. [2023-02-18 00:42:46,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1055 states have (on average 1.4502369668246446) internal successors, (1530), 1055 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:42:46,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1530 transitions. [2023-02-18 00:42:46,376 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1530 transitions. Word has length 36 [2023-02-18 00:42:46,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:42:46,376 INFO L495 AbstractCegarLoop]: Abstraction has 1056 states and 1530 transitions. [2023-02-18 00:42:46,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:42:46,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1530 transitions. [2023-02-18 00:42:46,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 00:42:46,377 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:42:46,377 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:42:46,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-18 00:42:46,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-18 00:42:46,587 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:42:46,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:42:46,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1506070490, now seen corresponding path program 13 times [2023-02-18 00:42:46,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:42:46,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963600626] [2023-02-18 00:42:46,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:42:46,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:42:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:42:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-18 00:42:46,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:42:46,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963600626] [2023-02-18 00:42:46,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963600626] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:42:46,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804892669] [2023-02-18 00:42:46,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 00:42:46,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:42:46,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:42:46,705 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:42:46,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-18 00:42:46,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:42:46,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 00:42:46,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:42:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 00:42:46,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:42:46,820 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 00:42:46,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804892669] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:42:46,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:42:46,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2023-02-18 00:42:46,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189022207] [2023-02-18 00:42:46,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:42:46,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 00:42:46,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:42:46,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 00:42:46,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-02-18 00:42:46,821 INFO L87 Difference]: Start difference. First operand 1056 states and 1530 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:42:52,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:42:52,234 INFO L93 Difference]: Finished difference Result 2713 states and 3839 transitions. [2023-02-18 00:42:52,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 00:42:52,235 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-02-18 00:42:52,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:42:52,240 INFO L225 Difference]: With dead ends: 2713 [2023-02-18 00:42:52,240 INFO L226 Difference]: Without dead ends: 2372 [2023-02-18 00:42:52,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2023-02-18 00:42:52,241 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 305 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:42:52,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 327 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:42:52,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2372 states. [2023-02-18 00:42:53,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2372 to 1217. [2023-02-18 00:42:53,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 1216 states have (on average 1.4375) internal successors, (1748), 1216 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:42:53,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 1748 transitions. [2023-02-18 00:42:53,567 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 1748 transitions. Word has length 38 [2023-02-18 00:42:53,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:42:53,567 INFO L495 AbstractCegarLoop]: Abstraction has 1217 states and 1748 transitions. [2023-02-18 00:42:53,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:42:53,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 1748 transitions. [2023-02-18 00:42:53,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 00:42:53,568 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:42:53,568 INFO L195 NwaCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:42:53,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-18 00:42:53,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:42:53,773 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:42:53,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:42:53,774 INFO L85 PathProgramCache]: Analyzing trace with hash 491807239, now seen corresponding path program 4 times [2023-02-18 00:42:53,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:42:53,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810791397] [2023-02-18 00:42:53,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:42:53,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:42:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:42:54,175 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:42:54,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:42:54,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810791397] [2023-02-18 00:42:54,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810791397] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:42:54,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668699930] [2023-02-18 00:42:54,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:42:54,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:42:54,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:42:54,177 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 00:42:54,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-18 00:42:54,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:42:54,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:42:54,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 57 conjunts are in the unsatisfiable core [2023-02-18 00:42:54,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:42:54,586 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:42:54,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:42:55,735 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:42:55,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668699930] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:42:55,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:42:55,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 59 [2023-02-18 00:42:55,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755690088] [2023-02-18 00:42:55,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:42:55,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-18 00:42:55,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:42:55,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-18 00:42:55,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=846, Invalid=2576, Unknown=0, NotChecked=0, Total=3422 [2023-02-18 00:42:55,737 INFO L87 Difference]: Start difference. First operand 1217 states and 1748 transitions. Second operand has 59 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:42:59,438 WARN L837 $PredicateComparison]: unable to prove that (and (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 16) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 23) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 14) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 20) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 21) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 24) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 25) 4294967296) 0) (> (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 19) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 17) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 15) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 13) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 18) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 22) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 26) 4294967296) 0)) is different from false [2023-02-18 00:43:42,696 WARN L837 $PredicateComparison]: unable to prove that (and (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 16) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 23) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 14) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 20) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 21) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 24) 4294967296) 0) (> (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 19) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 17) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 15) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 13) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 18) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 22) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296) 0)) is different from false [2023-02-18 00:44:49,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 00:46:12,851 WARN L837 $PredicateComparison]: unable to prove that (and (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 16) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 23) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 14) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 20) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 21) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 24) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 25) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 19) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 17) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 15) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 13) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 18) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 22) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 26) 4294967296) 0)) is different from false [2023-02-18 00:48:00,403 WARN L837 $PredicateComparison]: unable to prove that (and (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 16) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 23) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 14) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 20) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 21) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 24) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 19) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 17) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 15) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 13) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 18) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 22) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296) 0)) is different from false [2023-02-18 00:48:03,187 WARN L837 $PredicateComparison]: unable to prove that (and (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 16) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 14) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 20) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 0) (> (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296) 0) (> (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 19) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 17) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 15) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 13) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 18) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296) 0)) is different from false [2023-02-18 00:48:27,083 WARN L837 $PredicateComparison]: unable to prove that (and (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 16) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 23) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 14) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 20) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 21) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 19) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 17) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 15) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 13) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 18) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 22) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296) 0)) is different from false [2023-02-18 00:50:11,192 WARN L837 $PredicateComparison]: unable to prove that (and (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 16) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 14) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 20) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 19) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 17) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 15) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 13) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 18) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296) 0)) is different from false