./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de52.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e 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-de52.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 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 15:56:53,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 15:56:53,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 15:56:53,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 15:56:53,180 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 15:56:53,182 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 15:56:53,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 15:56:53,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 15:56:53,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 15:56:53,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 15:56:53,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 15:56:53,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 15:56:53,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 15:56:53,197 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 15:56:53,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 15:56:53,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 15:56:53,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 15:56:53,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 15:56:53,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 15:56:53,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 15:56:53,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 15:56:53,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 15:56:53,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 15:56:53,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 15:56:53,215 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 15:56:53,215 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 15:56:53,215 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 15:56:53,216 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 15:56:53,216 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 15:56:53,217 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 15:56:53,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 15:56:53,218 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 15:56:53,219 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 15:56:53,220 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 15:56:53,221 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 15:56:53,221 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 15:56:53,222 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 15:56:53,222 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 15:56:53,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 15:56:53,223 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 15:56:53,224 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 15:56:53,225 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 15:56:53,251 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 15:56:53,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 15:56:53,252 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 15:56:53,252 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 15:56:53,252 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 15:56:53,253 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 15:56:53,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 15:56:53,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 15:56:53,253 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 15:56:53,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 15:56:53,254 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 15:56:53,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 15:56:53,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 15:56:53,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 15:56:53,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 15:56:53,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 15:56:53,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 15:56:53,255 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 15:56:53,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 15:56:53,255 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 15:56:53,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 15:56:53,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 15:56:53,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 15:56:53,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 15:56:53,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 15:56:53,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 15:56:53,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 15:56:53,257 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 15:56:53,257 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 15:56:53,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 15:56:53,257 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 15:56:53,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 15:56:53,257 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 15:56:53,258 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 15:56:53,258 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 15:56:53,258 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d [2023-02-18 15:56:53,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 15:56:53,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 15:56:53,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 15:56:53,457 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 15:56:53,457 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 15:56:53,458 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de52.c [2023-02-18 15:56:54,487 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 15:56:54,627 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 15:56:54,628 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de52.c [2023-02-18 15:56:54,631 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8477e24e/04264466c25a41608fbd0ce303bd7788/FLAG72fabc331 [2023-02-18 15:56:54,644 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8477e24e/04264466c25a41608fbd0ce303bd7788 [2023-02-18 15:56:54,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 15:56:54,646 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 15:56:54,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 15:56:54,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 15:56:54,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 15:56:54,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 03:56:54" (1/1) ... [2023-02-18 15:56:54,652 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9920a7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:54, skipping insertion in model container [2023-02-18 15:56:54,652 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 03:56:54" (1/1) ... [2023-02-18 15:56:54,657 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 15:56:54,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 15:56:54,779 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-de52.c[368,381] [2023-02-18 15:56:54,791 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 15:56:54,799 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 15:56:54,807 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-de52.c[368,381] [2023-02-18 15:56:54,813 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 15:56:54,823 INFO L208 MainTranslator]: Completed translation [2023-02-18 15:56:54,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:54 WrapperNode [2023-02-18 15:56:54,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 15:56:54,825 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 15:56:54,825 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 15:56:54,825 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 15:56:54,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:54" (1/1) ... [2023-02-18 15:56:54,833 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:54" (1/1) ... [2023-02-18 15:56:54,847 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2023-02-18 15:56:54,847 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 15:56:54,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 15:56:54,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 15:56:54,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 15:56:54,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:54" (1/1) ... [2023-02-18 15:56:54,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:54" (1/1) ... [2023-02-18 15:56:54,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:54" (1/1) ... [2023-02-18 15:56:54,861 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:54" (1/1) ... [2023-02-18 15:56:54,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:54" (1/1) ... [2023-02-18 15:56:54,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:54" (1/1) ... [2023-02-18 15:56:54,874 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:54" (1/1) ... [2023-02-18 15:56:54,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:54" (1/1) ... [2023-02-18 15:56:54,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 15:56:54,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 15:56:54,878 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 15:56:54,878 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 15:56:54,879 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:54" (1/1) ... [2023-02-18 15:56:54,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 15:56:54,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:54,915 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 15:56:54,934 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 15:56:54,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 15:56:54,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 15:56:54,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 15:56:54,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 15:56:54,989 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 15:56:54,991 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 15:56:55,069 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 15:56:55,073 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 15:56:55,073 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2023-02-18 15:56:55,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 03:56:55 BoogieIcfgContainer [2023-02-18 15:56:55,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 15:56:55,076 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 15:56:55,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 15:56:55,078 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 15:56:55,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 03:56:54" (1/3) ... [2023-02-18 15:56:55,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@318af90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 03:56:55, skipping insertion in model container [2023-02-18 15:56:55,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:54" (2/3) ... [2023-02-18 15:56:55,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@318af90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 03:56:55, skipping insertion in model container [2023-02-18 15:56:55,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 03:56:55" (3/3) ... [2023-02-18 15:56:55,079 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de52.c [2023-02-18 15:56:55,090 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 15:56:55,090 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 15:56:55,116 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 15:56:55,120 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;@5320f4a2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 15:56:55,120 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 15:56:55,123 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.8571428571428572) 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 15:56:55,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 15:56:55,126 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:55,127 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:55,127 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:55,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:55,130 INFO L85 PathProgramCache]: Analyzing trace with hash 62220644, now seen corresponding path program 1 times [2023-02-18 15:56:55,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:55,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307648509] [2023-02-18 15:56:55,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:55,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:55,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:55,263 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 15:56:55,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:55,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307648509] [2023-02-18 15:56:55,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307648509] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:56:55,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 15:56:55,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 15:56:55,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836209983] [2023-02-18 15:56:55,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:56:55,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 15:56:55,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:55,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 15:56:55,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 15:56:55,294 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.8571428571428572) 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 15:56:55,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:55,308 INFO L93 Difference]: Finished difference Result 29 states and 47 transitions. [2023-02-18 15:56:55,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 15:56:55,310 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2023-02-18 15:56:55,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:55,314 INFO L225 Difference]: With dead ends: 29 [2023-02-18 15:56:55,315 INFO L226 Difference]: Without dead ends: 12 [2023-02-18 15:56:55,317 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 15:56:55,320 INFO L413 NwaCegarLoop]: 20 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, 20 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 15:56:55,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:56:55,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-02-18 15:56:55,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-02-18 15:56:55,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 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 15:56:55,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2023-02-18 15:56:55,340 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 11 [2023-02-18 15:56:55,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:55,340 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2023-02-18 15:56:55,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 15:56:55,341 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2023-02-18 15:56:55,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 15:56:55,341 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:55,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:55,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 15:56:55,342 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:55,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:55,343 INFO L85 PathProgramCache]: Analyzing trace with hash 58526560, now seen corresponding path program 1 times [2023-02-18 15:56:55,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:55,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563044599] [2023-02-18 15:56:55,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:55,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:55,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:55,512 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 15:56:55,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:55,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563044599] [2023-02-18 15:56:55,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563044599] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:56:55,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 15:56:55,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 15:56:55,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949241238] [2023-02-18 15:56:55,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:56:55,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 15:56:55,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:55,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 15:56:55,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 15:56:55,517 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 15:56:55,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:55,569 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2023-02-18 15:56:55,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 15:56:55,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2023-02-18 15:56:55,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:55,570 INFO L225 Difference]: With dead ends: 27 [2023-02-18 15:56:55,570 INFO L226 Difference]: Without dead ends: 18 [2023-02-18 15:56:55,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 15:56:55,572 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 5 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:55,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 27 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:56:55,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-18 15:56:55,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-02-18 15:56:55,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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 15:56:55,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2023-02-18 15:56:55,582 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2023-02-18 15:56:55,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:55,583 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2023-02-18 15:56:55,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 15:56:55,583 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2023-02-18 15:56:55,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 15:56:55,584 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:55,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:55,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 15:56:55,585 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:55,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:55,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1815988777, now seen corresponding path program 1 times [2023-02-18 15:56:55,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:55,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392560709] [2023-02-18 15:56:55,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:55,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:55,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:55,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:56:55,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:55,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392560709] [2023-02-18 15:56:55,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392560709] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:56:55,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 15:56:55,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 15:56:55,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636487921] [2023-02-18 15:56:55,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:56:55,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 15:56:55,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:55,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 15:56:55,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 15:56:55,621 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 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 15:56:55,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:55,656 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2023-02-18 15:56:55,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 15:56:55,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 15:56:55,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:55,657 INFO L225 Difference]: With dead ends: 28 [2023-02-18 15:56:55,657 INFO L226 Difference]: Without dead ends: 22 [2023-02-18 15:56:55,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 15:56:55,659 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:55,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 20 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:56:55,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-18 15:56:55,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-18 15:56:55,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 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 15:56:55,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2023-02-18 15:56:55,669 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 12 [2023-02-18 15:56:55,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:55,670 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2023-02-18 15:56:55,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 15:56:55,670 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2023-02-18 15:56:55,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 15:56:55,670 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:55,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:55,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 15:56:55,671 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:55,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:55,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1861241306, now seen corresponding path program 1 times [2023-02-18 15:56:55,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:55,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215944551] [2023-02-18 15:56:55,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:55,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:55,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:56:55,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:55,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215944551] [2023-02-18 15:56:55,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215944551] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:56:55,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 15:56:55,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 15:56:55,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587928981] [2023-02-18 15:56:55,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:56:55,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 15:56:55,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:55,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 15:56:55,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 15:56:55,709 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 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 15:56:55,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:55,721 INFO L93 Difference]: Finished difference Result 37 states and 53 transitions. [2023-02-18 15:56:55,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 15:56:55,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 15:56:55,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:55,723 INFO L225 Difference]: With dead ends: 37 [2023-02-18 15:56:55,724 INFO L226 Difference]: Without dead ends: 27 [2023-02-18 15:56:55,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 15:56:55,725 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:55,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 19 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:56:55,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-18 15:56:55,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-02-18 15:56:55,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 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 15:56:55,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2023-02-18 15:56:55,738 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 12 [2023-02-18 15:56:55,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:55,739 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2023-02-18 15:56:55,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 15:56:55,739 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2023-02-18 15:56:55,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-18 15:56:55,740 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:55,740 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:55,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 15:56:55,741 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:55,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:55,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1947191488, now seen corresponding path program 1 times [2023-02-18 15:56:55,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:55,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586412445] [2023-02-18 15:56:55,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:55,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:56:55,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:55,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586412445] [2023-02-18 15:56:55,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586412445] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:56:55,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 15:56:55,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 15:56:55,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905749193] [2023-02-18 15:56:55,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:56:55,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 15:56:55,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:55,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 15:56:55,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 15:56:55,802 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 15:56:55,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:55,822 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2023-02-18 15:56:55,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 15:56:55,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 15:56:55,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:55,823 INFO L225 Difference]: With dead ends: 34 [2023-02-18 15:56:55,823 INFO L226 Difference]: Without dead ends: 23 [2023-02-18 15:56:55,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 15:56:55,825 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:55,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:56:55,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-18 15:56:55,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-02-18 15:56:55,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 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 15:56:55,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 32 transitions. [2023-02-18 15:56:55,832 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 32 transitions. Word has length 13 [2023-02-18 15:56:55,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:55,832 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 32 transitions. [2023-02-18 15:56:55,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 15:56:55,833 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 32 transitions. [2023-02-18 15:56:55,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-18 15:56:55,833 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:55,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:55,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 15:56:55,834 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:55,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:55,834 INFO L85 PathProgramCache]: Analyzing trace with hash 696660059, now seen corresponding path program 1 times [2023-02-18 15:56:55,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:55,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624852157] [2023-02-18 15:56:55,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:55,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:56:55,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:55,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624852157] [2023-02-18 15:56:55,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624852157] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:55,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563292757] [2023-02-18 15:56:55,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:55,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:55,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:55,969 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 15:56:55,974 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 15:56:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:56,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 15:56:56,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:56:56,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:56:56,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:56:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:56:56,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563292757] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:56,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-18 15:56:56,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2023-02-18 15:56:56,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017022326] [2023-02-18 15:56:56,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:56:56,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 15:56:56,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:56,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 15:56:56,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-02-18 15:56:56,068 INFO L87 Difference]: Start difference. First operand 23 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 15:56:56,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:56,086 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2023-02-18 15:56:56,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 15:56:56,087 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2023-02-18 15:56:56,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:56,087 INFO L225 Difference]: With dead ends: 29 [2023-02-18 15:56:56,088 INFO L226 Difference]: Without dead ends: 20 [2023-02-18 15:56:56,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-02-18 15:56:56,089 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:56,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 17 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:56:56,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-18 15:56:56,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-02-18 15:56:56,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 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 15:56:56,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2023-02-18 15:56:56,093 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 14 [2023-02-18 15:56:56,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:56,093 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2023-02-18 15:56:56,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 15:56:56,093 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2023-02-18 15:56:56,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-18 15:56:56,094 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:56,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:56,103 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 15:56:56,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-18 15:56:56,299 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:56,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:56,299 INFO L85 PathProgramCache]: Analyzing trace with hash 240273083, now seen corresponding path program 1 times [2023-02-18 15:56:56,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:56,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216437330] [2023-02-18 15:56:56,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:56,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:56:56,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:56,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216437330] [2023-02-18 15:56:56,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216437330] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:56,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153855035] [2023-02-18 15:56:56,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:56,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:56,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:56,339 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 15:56:56,341 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 15:56:56,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:56,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 15:56:56,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:56:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:56:56,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:56:56,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:56:56,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153855035] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:56,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-18 15:56:56,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 5] total 7 [2023-02-18 15:56:56,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038275474] [2023-02-18 15:56:56,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:56:56,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 15:56:56,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:56,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 15:56:56,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-18 15:56:56,406 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 15:56:56,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:56,419 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2023-02-18 15:56:56,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 15:56:56,419 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2023-02-18 15:56:56,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:56,420 INFO L225 Difference]: With dead ends: 24 [2023-02-18 15:56:56,420 INFO L226 Difference]: Without dead ends: 17 [2023-02-18 15:56:56,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-18 15:56:56,421 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:56,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 20 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:56:56,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-18 15:56:56,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-18 15:56:56,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 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 15:56:56,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2023-02-18 15:56:56,424 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 14 [2023-02-18 15:56:56,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:56,424 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2023-02-18 15:56:56,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 15:56:56,425 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2023-02-18 15:56:56,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 15:56:56,425 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:56,425 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:56,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 15:56:56,630 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,SelfDestructingSolverStorable6 [2023-02-18 15:56:56,630 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:56,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:56,631 INFO L85 PathProgramCache]: Analyzing trace with hash -601796193, now seen corresponding path program 1 times [2023-02-18 15:56:56,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:56,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803242838] [2023-02-18 15:56:56,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:56,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:56,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:56:56,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:56,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803242838] [2023-02-18 15:56:56,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803242838] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:56,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196802369] [2023-02-18 15:56:56,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:56,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:56,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:56,721 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 15:56:56,742 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 15:56:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:56,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 15:56:56,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:56:56,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:56:56,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:56:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:56:56,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196802369] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:56:56,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:56:56,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-02-18 15:56:56,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012631808] [2023-02-18 15:56:56,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:56:56,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 15:56:56,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:56,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 15:56:56,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 15:56:56,855 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 15:56:56,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:56,895 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2023-02-18 15:56:56,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 15:56:56,895 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 15:56:56,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:56,897 INFO L225 Difference]: With dead ends: 27 [2023-02-18 15:56:56,897 INFO L226 Difference]: Without dead ends: 21 [2023-02-18 15:56:56,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 4 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 15:56:56,898 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:56,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 26 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:56:56,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-18 15:56:56,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-02-18 15:56:56,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 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 15:56:56,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2023-02-18 15:56:56,904 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 15 [2023-02-18 15:56:56,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:56,904 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2023-02-18 15:56:56,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 15:56:56,906 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2023-02-18 15:56:56,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 15:56:56,906 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:56,906 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:56,915 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 15:56:57,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:57,111 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:57,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:57,112 INFO L85 PathProgramCache]: Analyzing trace with hash -556543664, now seen corresponding path program 1 times [2023-02-18 15:56:57,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:57,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634455741] [2023-02-18 15:56:57,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:57,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:57,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:57,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:56:57,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:57,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634455741] [2023-02-18 15:56:57,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634455741] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:57,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626882100] [2023-02-18 15:56:57,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:57,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:57,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:57,172 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 15:56:57,174 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 15:56:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:57,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-18 15:56:57,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:56:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:56:57,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:56:57,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:56:57,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626882100] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:56:57,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:56:57,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-18 15:56:57,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113874752] [2023-02-18 15:56:57,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:56:57,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 15:56:57,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:57,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 15:56:57,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-02-18 15:56:57,287 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 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 15:56:57,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:57,437 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2023-02-18 15:56:57,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 15:56:57,438 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 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 15:56:57,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:57,439 INFO L225 Difference]: With dead ends: 63 [2023-02-18 15:56:57,439 INFO L226 Difference]: Without dead ends: 48 [2023-02-18 15:56:57,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2023-02-18 15:56:57,440 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:57,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 57 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:56:57,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-18 15:56:57,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2023-02-18 15:56:57,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 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 15:56:57,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2023-02-18 15:56:57,447 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 15 [2023-02-18 15:56:57,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:57,447 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2023-02-18 15:56:57,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 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 15:56:57,447 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2023-02-18 15:56:57,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 15:56:57,448 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:57,448 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:57,469 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 15:56:57,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:57,653 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:57,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:57,653 INFO L85 PathProgramCache]: Analyzing trace with hash 2085744240, now seen corresponding path program 1 times [2023-02-18 15:56:57,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:57,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380393816] [2023-02-18 15:56:57,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:57,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:57,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:57,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:56:57,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:57,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380393816] [2023-02-18 15:56:57,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380393816] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:57,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692780347] [2023-02-18 15:56:57,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:57,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:57,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:57,726 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 15:56:57,757 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 15:56:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:57,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 15:56:57,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:56:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:56:57,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:56:57,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:56:57,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692780347] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:56:57,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:56:57,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 14 [2023-02-18 15:56:57,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678194959] [2023-02-18 15:56:57,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:56:57,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 15:56:57,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:57,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 15:56:57,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-02-18 15:56:57,851 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 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 15:56:57,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:57,988 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2023-02-18 15:56:57,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 15:56:57,988 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 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 17 [2023-02-18 15:56:57,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:57,989 INFO L225 Difference]: With dead ends: 71 [2023-02-18 15:56:57,989 INFO L226 Difference]: Without dead ends: 64 [2023-02-18 15:56:57,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2023-02-18 15:56:57,989 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 42 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:57,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 59 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:56:57,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-18 15:56:57,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 34. [2023-02-18 15:56:57,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 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 15:56:57,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2023-02-18 15:56:57,997 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 17 [2023-02-18 15:56:57,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:57,997 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2023-02-18 15:56:57,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 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 15:56:57,997 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2023-02-18 15:56:57,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 15:56:57,998 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:57,998 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:58,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-18 15:56:58,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-18 15:56:58,202 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:58,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:58,203 INFO L85 PathProgramCache]: Analyzing trace with hash -806394657, now seen corresponding path program 2 times [2023-02-18 15:56:58,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:58,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107317570] [2023-02-18 15:56:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:58,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:58,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 15:56:58,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:58,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107317570] [2023-02-18 15:56:58,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107317570] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:58,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536934865] [2023-02-18 15:56:58,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 15:56:58,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:58,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:58,256 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 15:56:58,281 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 15:56:58,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 15:56:58,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:56:58,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 15:56:58,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:56:58,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 15:56:58,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:56:58,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 15:56:58,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536934865] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:56:58,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:56:58,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-02-18 15:56:58,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014413595] [2023-02-18 15:56:58,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:56:58,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 15:56:58,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:58,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 15:56:58,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 15:56:58,342 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 15:56:58,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:58,360 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2023-02-18 15:56:58,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 15:56:58,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 17 [2023-02-18 15:56:58,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:58,362 INFO L225 Difference]: With dead ends: 46 [2023-02-18 15:56:58,363 INFO L226 Difference]: Without dead ends: 30 [2023-02-18 15:56:58,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 8 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 15:56:58,363 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:58,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:56:58,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-18 15:56:58,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-02-18 15:56:58,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 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 15:56:58,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2023-02-18 15:56:58,378 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 17 [2023-02-18 15:56:58,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:58,378 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2023-02-18 15:56:58,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 15:56:58,378 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2023-02-18 15:56:58,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 15:56:58,381 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:58,382 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:58,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-18 15:56:58,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:58,586 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:58,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:58,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1535262302, now seen corresponding path program 3 times [2023-02-18 15:56:58,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:58,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405042223] [2023-02-18 15:56:58,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:58,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:58,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 15:56:58,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:58,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405042223] [2023-02-18 15:56:58,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405042223] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:58,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666060968] [2023-02-18 15:56:58,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 15:56:58,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:58,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:58,626 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 15:56:58,629 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 15:56:58,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-18 15:56:58,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:56:58,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-18 15:56:58,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:56:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 15:56:58,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:56:58,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 15:56:58,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666060968] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:56:58,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:56:58,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-02-18 15:56:58,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137377489] [2023-02-18 15:56:58,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:56:58,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 15:56:58,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:58,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 15:56:58,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-02-18 15:56:58,711 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 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 15:56:58,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:58,854 INFO L93 Difference]: Finished difference Result 89 states and 120 transitions. [2023-02-18 15:56:58,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 15:56:58,854 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 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 17 [2023-02-18 15:56:58,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:58,855 INFO L225 Difference]: With dead ends: 89 [2023-02-18 15:56:58,855 INFO L226 Difference]: Without dead ends: 58 [2023-02-18 15:56:58,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-02-18 15:56:58,855 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:58,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 94 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:56:58,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-18 15:56:58,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2023-02-18 15:56:58,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.45) internal successors, (58), 40 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 15:56:58,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 58 transitions. [2023-02-18 15:56:58,863 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 58 transitions. Word has length 17 [2023-02-18 15:56:58,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:58,863 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 58 transitions. [2023-02-18 15:56:58,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 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 15:56:58,863 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 58 transitions. [2023-02-18 15:56:58,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 15:56:58,864 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:58,864 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:58,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 15:56:59,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:59,069 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:59,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:59,069 INFO L85 PathProgramCache]: Analyzing trace with hash 750125673, now seen corresponding path program 2 times [2023-02-18 15:56:59,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:59,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471444515] [2023-02-18 15:56:59,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:59,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:59,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:59,128 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 15:56:59,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:59,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471444515] [2023-02-18 15:56:59,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471444515] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:59,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308405025] [2023-02-18 15:56:59,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 15:56:59,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:59,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:59,130 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 15:56:59,132 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 15:56:59,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 15:56:59,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:56:59,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 15:56:59,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:56:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 15:56:59,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:56:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 15:56:59,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308405025] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:56:59,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:56:59,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2023-02-18 15:56:59,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750279638] [2023-02-18 15:56:59,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:56:59,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 15:56:59,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:59,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 15:56:59,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-02-18 15:56:59,187 INFO L87 Difference]: Start difference. First operand 41 states and 58 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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 15:56:59,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:59,379 INFO L93 Difference]: Finished difference Result 76 states and 109 transitions. [2023-02-18 15:56:59,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 15:56:59,380 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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 15:56:59,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:59,380 INFO L225 Difference]: With dead ends: 76 [2023-02-18 15:56:59,380 INFO L226 Difference]: Without dead ends: 54 [2023-02-18 15:56:59,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2023-02-18 15:56:59,381 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:59,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 71 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:56:59,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-02-18 15:56:59,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2023-02-18 15:56:59,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 45 states have internal predecessors, (62), 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 15:56:59,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2023-02-18 15:56:59,389 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 18 [2023-02-18 15:56:59,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:59,389 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2023-02-18 15:56:59,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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 15:56:59,389 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2023-02-18 15:56:59,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 15:56:59,390 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:59,390 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:59,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-18 15:56:59,594 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,SelfDestructingSolverStorable12 [2023-02-18 15:56:59,595 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:59,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:59,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1468233473, now seen corresponding path program 2 times [2023-02-18 15:56:59,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:59,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205008151] [2023-02-18 15:56:59,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:59,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:59,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:59,644 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 15:56:59,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:59,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205008151] [2023-02-18 15:56:59,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205008151] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:59,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029938414] [2023-02-18 15:56:59,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 15:56:59,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:59,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:59,657 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 15:56:59,658 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 15:56:59,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 15:56:59,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:56:59,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 15:56:59,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:56:59,711 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 15:56:59,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:56:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 15:56:59,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029938414] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:56:59,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:56:59,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2023-02-18 15:56:59,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199139735] [2023-02-18 15:56:59,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:56:59,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 15:56:59,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:59,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 15:56:59,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-02-18 15:56:59,715 INFO L87 Difference]: Start difference. First operand 46 states and 62 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 15:56:59,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:59,975 INFO L93 Difference]: Finished difference Result 110 states and 148 transitions. [2023-02-18 15:56:59,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-18 15:56:59,976 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 19 [2023-02-18 15:56:59,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:59,976 INFO L225 Difference]: With dead ends: 110 [2023-02-18 15:56:59,976 INFO L226 Difference]: Without dead ends: 88 [2023-02-18 15:56:59,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2023-02-18 15:56:59,977 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:59,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 143 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:56:59,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-18 15:56:59,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 57. [2023-02-18 15:56:59,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.3214285714285714) internal successors, (74), 56 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 15:56:59,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2023-02-18 15:56:59,986 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 19 [2023-02-18 15:56:59,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:59,986 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2023-02-18 15:56:59,986 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 15:56:59,987 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2023-02-18 15:56:59,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 15:56:59,987 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:59,987 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:59,993 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 15:57:00,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-18 15:57:00,192 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:00,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:00,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1336926662, now seen corresponding path program 3 times [2023-02-18 15:57:00,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:00,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022262034] [2023-02-18 15:57:00,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:00,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:00,263 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:57:00,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:00,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022262034] [2023-02-18 15:57:00,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022262034] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:00,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245017721] [2023-02-18 15:57:00,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 15:57:00,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:00,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:00,281 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 15:57:00,309 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 15:57:00,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 15:57:00,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:00,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 15:57:00,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 15:57:00,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:00,362 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 15:57:00,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245017721] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:00,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:00,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2023-02-18 15:57:00,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794101008] [2023-02-18 15:57:00,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:00,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 15:57:00,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:00,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 15:57:00,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-02-18 15:57:00,364 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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 15:57:00,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:00,949 INFO L93 Difference]: Finished difference Result 148 states and 200 transitions. [2023-02-18 15:57:00,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-18 15:57:00,950 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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 20 [2023-02-18 15:57:00,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:00,951 INFO L225 Difference]: With dead ends: 148 [2023-02-18 15:57:00,951 INFO L226 Difference]: Without dead ends: 124 [2023-02-18 15:57:00,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=1563, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 15:57:00,955 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 136 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:00,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 168 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 15:57:00,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-02-18 15:57:00,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 75. [2023-02-18 15:57:00,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.3243243243243243) internal successors, (98), 74 states have internal predecessors, (98), 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 15:57:00,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2023-02-18 15:57:00,973 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 20 [2023-02-18 15:57:00,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:00,973 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2023-02-18 15:57:00,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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 15:57:00,974 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2023-02-18 15:57:00,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-18 15:57:00,975 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:00,975 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:00,980 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 15:57:01,180 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,SelfDestructingSolverStorable14 [2023-02-18 15:57:01,181 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:01,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:01,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1458344336, now seen corresponding path program 3 times [2023-02-18 15:57:01,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:01,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520423632] [2023-02-18 15:57:01,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:01,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:57:01,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:01,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520423632] [2023-02-18 15:57:01,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520423632] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:01,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126181011] [2023-02-18 15:57:01,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 15:57:01,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:01,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:01,253 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 15:57:01,294 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 15:57:01,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 15:57:01,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:01,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 15:57:01,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:01,355 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 15:57:01,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 15:57:01,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126181011] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:01,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:01,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2023-02-18 15:57:01,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15605095] [2023-02-18 15:57:01,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:01,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 15:57:01,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:01,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 15:57:01,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2023-02-18 15:57:01,362 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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 15:57:01,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:01,918 INFO L93 Difference]: Finished difference Result 126 states and 167 transitions. [2023-02-18 15:57:01,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-18 15:57:01,918 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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 21 [2023-02-18 15:57:01,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:01,919 INFO L225 Difference]: With dead ends: 126 [2023-02-18 15:57:01,919 INFO L226 Difference]: Without dead ends: 111 [2023-02-18 15:57:01,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=372, Invalid=2708, Unknown=0, NotChecked=0, Total=3080 [2023-02-18 15:57:01,920 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 106 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:01,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 59 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 15:57:01,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-02-18 15:57:01,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 74. [2023-02-18 15:57:01,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.2876712328767124) internal successors, (94), 73 states have internal predecessors, (94), 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 15:57:01,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2023-02-18 15:57:01,936 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 21 [2023-02-18 15:57:01,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:01,937 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2023-02-18 15:57:01,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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 15:57:01,937 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2023-02-18 15:57:01,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 15:57:01,939 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:01,939 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:01,944 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 15:57:02,144 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,SelfDestructingSolverStorable15 [2023-02-18 15:57:02,144 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:02,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:02,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1455648122, now seen corresponding path program 4 times [2023-02-18 15:57:02,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:02,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414439302] [2023-02-18 15:57:02,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:02,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 15:57:02,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:02,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414439302] [2023-02-18 15:57:02,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414439302] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:02,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231477458] [2023-02-18 15:57:02,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 15:57:02,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:02,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:02,265 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 15:57:02,267 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 15:57:02,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 15:57:02,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:02,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 15:57:02,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 15:57:02,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:02,340 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 15:57:02,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231477458] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:02,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:02,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2023-02-18 15:57:02,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896246819] [2023-02-18 15:57:02,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:02,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 15:57:02,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:02,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 15:57:02,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-18 15:57:02,342 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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 15:57:02,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:02,375 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2023-02-18 15:57:02,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 15:57:02,375 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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 22 [2023-02-18 15:57:02,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:02,376 INFO L225 Difference]: With dead ends: 93 [2023-02-18 15:57:02,376 INFO L226 Difference]: Without dead ends: 72 [2023-02-18 15:57:02,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 12 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-18 15:57:02,377 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:02,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 38 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:57:02,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-02-18 15:57:02,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-02-18 15:57:02,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.295774647887324) internal successors, (92), 71 states have internal predecessors, (92), 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 15:57:02,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2023-02-18 15:57:02,389 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 22 [2023-02-18 15:57:02,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:02,389 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2023-02-18 15:57:02,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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 15:57:02,389 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2023-02-18 15:57:02,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 15:57:02,389 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:02,390 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:02,396 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 15:57:02,596 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,SelfDestructingSolverStorable16 [2023-02-18 15:57:02,597 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:02,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:02,597 INFO L85 PathProgramCache]: Analyzing trace with hash 181444187, now seen corresponding path program 5 times [2023-02-18 15:57:02,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:02,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870124357] [2023-02-18 15:57:02,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:02,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:02,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 15:57:02,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:02,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870124357] [2023-02-18 15:57:02,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870124357] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:02,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462641044] [2023-02-18 15:57:02,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 15:57:02,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:02,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:02,674 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 15:57:02,701 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 15:57:02,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-18 15:57:02,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:02,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 15:57:02,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 15:57:02,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:02,841 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-18 15:57:02,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462641044] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:02,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:02,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 7] total 20 [2023-02-18 15:57:02,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563909392] [2023-02-18 15:57:02,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:02,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 15:57:02,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:02,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 15:57:02,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2023-02-18 15:57:02,843 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 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 15:57:03,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:03,302 INFO L93 Difference]: Finished difference Result 203 states and 266 transitions. [2023-02-18 15:57:03,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-18 15:57:03,302 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 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 22 [2023-02-18 15:57:03,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:03,303 INFO L225 Difference]: With dead ends: 203 [2023-02-18 15:57:03,303 INFO L226 Difference]: Without dead ends: 165 [2023-02-18 15:57:03,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=252, Invalid=804, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 15:57:03,304 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 80 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:03,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 420 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 15:57:03,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-02-18 15:57:03,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 79. [2023-02-18 15:57:03,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.2435897435897436) internal successors, (97), 78 states have internal predecessors, (97), 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 15:57:03,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2023-02-18 15:57:03,315 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 22 [2023-02-18 15:57:03,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:03,316 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2023-02-18 15:57:03,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 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 15:57:03,316 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2023-02-18 15:57:03,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 15:57:03,316 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:03,316 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:03,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-18 15:57:03,521 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,SelfDestructingSolverStorable17 [2023-02-18 15:57:03,521 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:03,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:03,521 INFO L85 PathProgramCache]: Analyzing trace with hash 534298912, now seen corresponding path program 4 times [2023-02-18 15:57:03,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:03,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358104111] [2023-02-18 15:57:03,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:03,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:03,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:03,593 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 15:57:03,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:03,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358104111] [2023-02-18 15:57:03,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358104111] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:03,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691727320] [2023-02-18 15:57:03,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 15:57:03,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:03,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:03,595 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 15:57:03,624 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 15:57:03,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 15:57:03,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:03,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-18 15:57:03,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:03,729 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 15:57:03,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:03,846 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 15:57:03,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691727320] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:03,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:03,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 10] total 26 [2023-02-18 15:57:03,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411434935] [2023-02-18 15:57:03,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:03,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 15:57:03,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:03,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 15:57:03,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2023-02-18 15:57:03,848 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 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 15:57:04,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:04,998 INFO L93 Difference]: Finished difference Result 219 states and 286 transitions. [2023-02-18 15:57:04,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-18 15:57:04,998 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 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 23 [2023-02-18 15:57:04,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:04,999 INFO L225 Difference]: With dead ends: 219 [2023-02-18 15:57:04,999 INFO L226 Difference]: Without dead ends: 191 [2023-02-18 15:57:05,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 9 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=572, Invalid=3088, Unknown=0, NotChecked=0, Total=3660 [2023-02-18 15:57:05,000 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 106 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:05,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 501 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1287 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 15:57:05,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-02-18 15:57:05,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 115. [2023-02-18 15:57:05,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.3508771929824561) internal successors, (154), 114 states have internal predecessors, (154), 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 15:57:05,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 154 transitions. [2023-02-18 15:57:05,021 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 154 transitions. Word has length 23 [2023-02-18 15:57:05,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:05,021 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 154 transitions. [2023-02-18 15:57:05,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 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 15:57:05,021 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 154 transitions. [2023-02-18 15:57:05,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 15:57:05,022 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:05,022 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:05,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-18 15:57:05,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:05,227 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:05,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:05,227 INFO L85 PathProgramCache]: Analyzing trace with hash -146134359, now seen corresponding path program 4 times [2023-02-18 15:57:05,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:05,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133348781] [2023-02-18 15:57:05,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:05,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:57:05,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:05,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133348781] [2023-02-18 15:57:05,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133348781] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:05,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768878588] [2023-02-18 15:57:05,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 15:57:05,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:05,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:05,357 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 15:57:05,369 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 15:57:05,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 15:57:05,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:05,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 15:57:05,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:05,463 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-18 15:57:05,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:05,466 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-18 15:57:05,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768878588] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:05,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:05,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2023-02-18 15:57:05,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309228501] [2023-02-18 15:57:05,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:05,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 15:57:05,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:05,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 15:57:05,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2023-02-18 15:57:05,467 INFO L87 Difference]: Start difference. First operand 115 states and 154 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 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 15:57:06,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:06,604 INFO L93 Difference]: Finished difference Result 222 states and 322 transitions. [2023-02-18 15:57:06,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-02-18 15:57:06,604 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 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 15:57:06,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:06,605 INFO L225 Difference]: With dead ends: 222 [2023-02-18 15:57:06,605 INFO L226 Difference]: Without dead ends: 191 [2023-02-18 15:57:06,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=572, Invalid=4398, Unknown=0, NotChecked=0, Total=4970 [2023-02-18 15:57:06,606 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 158 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:06,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 91 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 15:57:06,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-02-18 15:57:06,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 144. [2023-02-18 15:57:06,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.3356643356643356) internal successors, (191), 143 states have internal predecessors, (191), 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 15:57:06,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 191 transitions. [2023-02-18 15:57:06,644 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 191 transitions. Word has length 24 [2023-02-18 15:57:06,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:06,644 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 191 transitions. [2023-02-18 15:57:06,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 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 15:57:06,645 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 191 transitions. [2023-02-18 15:57:06,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 15:57:06,645 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:06,645 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:06,650 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 15:57:06,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:06,850 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:06,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:06,850 INFO L85 PathProgramCache]: Analyzing trace with hash -703235457, now seen corresponding path program 6 times [2023-02-18 15:57:06,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:06,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285555786] [2023-02-18 15:57:06,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:06,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:06,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:06,914 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 15:57:06,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:06,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285555786] [2023-02-18 15:57:06,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285555786] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:06,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854194073] [2023-02-18 15:57:06,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 15:57:06,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:06,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:06,930 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 15:57:06,961 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 15:57:06,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-02-18 15:57:06,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:06,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 15:57:06,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:07,002 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 15:57:07,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:07,028 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 15:57:07,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854194073] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:07,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:07,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2023-02-18 15:57:07,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698726094] [2023-02-18 15:57:07,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:07,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 15:57:07,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:07,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 15:57:07,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 15:57:07,030 INFO L87 Difference]: Start difference. First operand 144 states and 191 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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 15:57:07,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:07,105 INFO L93 Difference]: Finished difference Result 159 states and 211 transitions. [2023-02-18 15:57:07,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 15:57:07,105 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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 25 [2023-02-18 15:57:07,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:07,106 INFO L225 Difference]: With dead ends: 159 [2023-02-18 15:57:07,106 INFO L226 Difference]: Without dead ends: 147 [2023-02-18 15:57:07,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 13 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-02-18 15:57:07,107 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:07,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 45 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:57:07,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-02-18 15:57:07,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2023-02-18 15:57:07,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.321917808219178) internal successors, (193), 146 states have internal predecessors, (193), 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 15:57:07,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 193 transitions. [2023-02-18 15:57:07,134 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 193 transitions. Word has length 25 [2023-02-18 15:57:07,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:07,134 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 193 transitions. [2023-02-18 15:57:07,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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 15:57:07,135 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 193 transitions. [2023-02-18 15:57:07,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 15:57:07,136 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:07,136 INFO L195 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:07,143 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 15:57:07,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:07,341 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:07,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:07,341 INFO L85 PathProgramCache]: Analyzing trace with hash -322743410, now seen corresponding path program 7 times [2023-02-18 15:57:07,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:07,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922868056] [2023-02-18 15:57:07,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:07,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:07,455 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 15:57:07,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:07,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922868056] [2023-02-18 15:57:07,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922868056] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:07,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354004235] [2023-02-18 15:57:07,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 15:57:07,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:07,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:07,457 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 15:57:07,513 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 15:57:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:07,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-18 15:57:07,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:07,651 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:57:07,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:07,758 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-18 15:57:07,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354004235] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:07,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:07,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 10] total 27 [2023-02-18 15:57:07,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497927471] [2023-02-18 15:57:07,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:07,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 15:57:07,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:07,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 15:57:07,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2023-02-18 15:57:07,760 INFO L87 Difference]: Start difference. First operand 147 states and 193 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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 15:57:09,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:09,101 INFO L93 Difference]: Finished difference Result 322 states and 422 transitions. [2023-02-18 15:57:09,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-02-18 15:57:09,102 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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 25 [2023-02-18 15:57:09,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:09,103 INFO L225 Difference]: With dead ends: 322 [2023-02-18 15:57:09,103 INFO L226 Difference]: Without dead ends: 279 [2023-02-18 15:57:09,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 26 SyntacticMatches, 11 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=744, Invalid=4806, Unknown=0, NotChecked=0, Total=5550 [2023-02-18 15:57:09,104 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 119 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:09,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 485 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 15:57:09,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2023-02-18 15:57:09,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 155. [2023-02-18 15:57:09,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.3181818181818181) internal successors, (203), 154 states have internal predecessors, (203), 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 15:57:09,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 203 transitions. [2023-02-18 15:57:09,140 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 203 transitions. Word has length 25 [2023-02-18 15:57:09,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:09,140 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 203 transitions. [2023-02-18 15:57:09,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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 15:57:09,140 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 203 transitions. [2023-02-18 15:57:09,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 15:57:09,141 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:09,141 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:09,145 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 15:57:09,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:09,346 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:09,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:09,346 INFO L85 PathProgramCache]: Analyzing trace with hash -2074329332, now seen corresponding path program 5 times [2023-02-18 15:57:09,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:09,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766355574] [2023-02-18 15:57:09,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:09,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:09,446 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 15:57:09,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:09,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766355574] [2023-02-18 15:57:09,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766355574] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:09,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931349836] [2023-02-18 15:57:09,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 15:57:09,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:09,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:09,448 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 15:57:09,451 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 15:57:09,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-18 15:57:09,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:09,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-18 15:57:09,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:09,578 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 15:57:09,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 15:57:09,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931349836] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:09,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:09,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 30 [2023-02-18 15:57:09,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850193992] [2023-02-18 15:57:09,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:09,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-18 15:57:09,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:09,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-18 15:57:09,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2023-02-18 15:57:09,761 INFO L87 Difference]: Start difference. First operand 155 states and 203 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 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 15:57:11,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:11,017 INFO L93 Difference]: Finished difference Result 312 states and 407 transitions. [2023-02-18 15:57:11,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-02-18 15:57:11,018 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 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 15:57:11,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:11,019 INFO L225 Difference]: With dead ends: 312 [2023-02-18 15:57:11,019 INFO L226 Difference]: Without dead ends: 255 [2023-02-18 15:57:11,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=400, Invalid=3022, Unknown=0, NotChecked=0, Total=3422 [2023-02-18 15:57:11,020 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 163 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:11,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 492 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 15:57:11,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2023-02-18 15:57:11,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 157. [2023-02-18 15:57:11,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.3397435897435896) internal successors, (209), 156 states have internal predecessors, (209), 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 15:57:11,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 209 transitions. [2023-02-18 15:57:11,067 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 209 transitions. Word has length 26 [2023-02-18 15:57:11,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:11,067 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 209 transitions. [2023-02-18 15:57:11,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 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 15:57:11,068 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 209 transitions. [2023-02-18 15:57:11,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 15:57:11,068 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:11,068 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:11,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-02-18 15:57:11,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:11,273 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:11,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:11,273 INFO L85 PathProgramCache]: Analyzing trace with hash -311048343, now seen corresponding path program 6 times [2023-02-18 15:57:11,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:11,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98230616] [2023-02-18 15:57:11,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:11,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:11,371 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 15:57:11,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:11,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98230616] [2023-02-18 15:57:11,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98230616] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:11,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799121543] [2023-02-18 15:57:11,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 15:57:11,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:11,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:11,398 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 15:57:11,426 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 15:57:11,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-18 15:57:11,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:11,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 15:57:11,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:11,541 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 15:57:11,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-18 15:57:11,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799121543] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:11,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:11,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 8] total 23 [2023-02-18 15:57:11,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971679173] [2023-02-18 15:57:11,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:11,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 15:57:11,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:11,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 15:57:11,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2023-02-18 15:57:11,620 INFO L87 Difference]: Start difference. First operand 157 states and 209 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 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 15:57:12,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:12,491 INFO L93 Difference]: Finished difference Result 347 states and 455 transitions. [2023-02-18 15:57:12,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-18 15:57:12,491 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 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 15:57:12,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:12,492 INFO L225 Difference]: With dead ends: 347 [2023-02-18 15:57:12,492 INFO L226 Difference]: Without dead ends: 289 [2023-02-18 15:57:12,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=352, Invalid=3070, Unknown=0, NotChecked=0, Total=3422 [2023-02-18 15:57:12,494 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 120 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:12,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 614 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 15:57:12,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-02-18 15:57:12,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 171. [2023-02-18 15:57:12,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.311764705882353) internal successors, (223), 170 states have internal predecessors, (223), 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 15:57:12,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 223 transitions. [2023-02-18 15:57:12,539 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 223 transitions. Word has length 26 [2023-02-18 15:57:12,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:12,540 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 223 transitions. [2023-02-18 15:57:12,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 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 15:57:12,540 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 223 transitions. [2023-02-18 15:57:12,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 15:57:12,540 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:12,541 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:12,548 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 15:57:12,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:12,746 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:12,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:12,747 INFO L85 PathProgramCache]: Analyzing trace with hash -318710337, now seen corresponding path program 8 times [2023-02-18 15:57:12,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:12,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473188870] [2023-02-18 15:57:12,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:12,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:12,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-18 15:57:12,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:12,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473188870] [2023-02-18 15:57:12,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473188870] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:12,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550151938] [2023-02-18 15:57:12,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 15:57:12,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:12,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:12,866 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 15:57:12,891 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 15:57:12,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 15:57:12,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:12,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 15:57:12,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-18 15:57:12,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:12,978 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-18 15:57:12,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550151938] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:12,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:12,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 8 [2023-02-18 15:57:12,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418905600] [2023-02-18 15:57:12,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:12,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 15:57:12,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:12,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 15:57:12,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-18 15:57:12,980 INFO L87 Difference]: Start difference. First operand 171 states and 223 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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 15:57:13,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:13,069 INFO L93 Difference]: Finished difference Result 215 states and 288 transitions. [2023-02-18 15:57:13,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 15:57:13,069 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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 15:57:13,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:13,070 INFO L225 Difference]: With dead ends: 215 [2023-02-18 15:57:13,070 INFO L226 Difference]: Without dead ends: 180 [2023-02-18 15:57:13,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 16 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-18 15:57:13,071 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:13,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 62 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:57:13,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-02-18 15:57:13,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 159. [2023-02-18 15:57:13,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.3227848101265822) internal successors, (209), 158 states have internal predecessors, (209), 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 15:57:13,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 209 transitions. [2023-02-18 15:57:13,114 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 209 transitions. Word has length 27 [2023-02-18 15:57:13,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:13,114 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 209 transitions. [2023-02-18 15:57:13,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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 15:57:13,117 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 209 transitions. [2023-02-18 15:57:13,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 15:57:13,118 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:13,118 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:13,133 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 15:57:13,329 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,SelfDestructingSolverStorable24 [2023-02-18 15:57:13,329 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:13,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:13,329 INFO L85 PathProgramCache]: Analyzing trace with hash -831872481, now seen corresponding path program 5 times [2023-02-18 15:57:13,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:13,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163733554] [2023-02-18 15:57:13,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:13,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:13,486 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:57:13,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:13,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163733554] [2023-02-18 15:57:13,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163733554] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:13,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964600447] [2023-02-18 15:57:13,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 15:57:13,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:13,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:13,488 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 15:57:13,490 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 15:57:13,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-18 15:57:13,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:13,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 15:57:13,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:13,750 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:57:13,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:13,901 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 15:57:13,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964600447] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:13,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:13,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 13] total 33 [2023-02-18 15:57:13,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282209035] [2023-02-18 15:57:13,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:13,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 15:57:13,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:13,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 15:57:13,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 15:57:13,903 INFO L87 Difference]: Start difference. First operand 159 states and 209 transitions. Second operand has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 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 15:57:15,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:15,274 INFO L93 Difference]: Finished difference Result 364 states and 540 transitions. [2023-02-18 15:57:15,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-02-18 15:57:15,274 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 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 15:57:15,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:15,275 INFO L225 Difference]: With dead ends: 364 [2023-02-18 15:57:15,275 INFO L226 Difference]: Without dead ends: 325 [2023-02-18 15:57:15,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 32 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1508, Invalid=4812, Unknown=0, NotChecked=0, Total=6320 [2023-02-18 15:57:15,277 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 181 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:15,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 295 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 15:57:15,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-02-18 15:57:15,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 187. [2023-02-18 15:57:15,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.3763440860215055) internal successors, (256), 186 states have internal predecessors, (256), 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 15:57:15,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 256 transitions. [2023-02-18 15:57:15,358 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 256 transitions. Word has length 27 [2023-02-18 15:57:15,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:15,358 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 256 transitions. [2023-02-18 15:57:15,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 33 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 15:57:15,358 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 256 transitions. [2023-02-18 15:57:15,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 15:57:15,359 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:15,359 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:15,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-18 15:57:15,563 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,SelfDestructingSolverStorable25 [2023-02-18 15:57:15,564 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:15,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:15,564 INFO L85 PathProgramCache]: Analyzing trace with hash -329349222, now seen corresponding path program 9 times [2023-02-18 15:57:15,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:15,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572591099] [2023-02-18 15:57:15,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:15,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:15,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 15:57:15,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:15,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572591099] [2023-02-18 15:57:15,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572591099] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:15,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221849937] [2023-02-18 15:57:15,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 15:57:15,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:15,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:15,697 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 15:57:15,717 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 15:57:15,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 15:57:15,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:15,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 15:57:15,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:15,818 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 15:57:15,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 15:57:15,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221849937] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:15,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:15,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2023-02-18 15:57:15,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863766717] [2023-02-18 15:57:15,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:15,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 15:57:15,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:15,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 15:57:15,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-02-18 15:57:15,857 INFO L87 Difference]: Start difference. First operand 187 states and 256 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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 15:57:16,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:16,026 INFO L93 Difference]: Finished difference Result 233 states and 322 transitions. [2023-02-18 15:57:16,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 15:57:16,027 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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 28 [2023-02-18 15:57:16,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:16,028 INFO L225 Difference]: With dead ends: 233 [2023-02-18 15:57:16,028 INFO L226 Difference]: Without dead ends: 216 [2023-02-18 15:57:16,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2023-02-18 15:57:16,028 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:16,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 127 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:57:16,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-02-18 15:57:16,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2023-02-18 15:57:16,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.3627906976744186) internal successors, (293), 215 states have internal predecessors, (293), 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 15:57:16,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 293 transitions. [2023-02-18 15:57:16,091 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 293 transitions. Word has length 28 [2023-02-18 15:57:16,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:16,091 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 293 transitions. [2023-02-18 15:57:16,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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 15:57:16,091 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 293 transitions. [2023-02-18 15:57:16,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 15:57:16,092 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:16,092 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:16,099 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 15:57:16,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-18 15:57:16,296 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:16,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:16,297 INFO L85 PathProgramCache]: Analyzing trace with hash 797590991, now seen corresponding path program 6 times [2023-02-18 15:57:16,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:16,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578443210] [2023-02-18 15:57:16,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:16,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:16,413 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-18 15:57:16,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:16,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578443210] [2023-02-18 15:57:16,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578443210] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:16,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018444865] [2023-02-18 15:57:16,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 15:57:16,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:16,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:16,415 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 15:57:16,417 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 15:57:16,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-18 15:57:16,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:16,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 15:57:16,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-18 15:57:16,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-18 15:57:16,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018444865] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:16,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:16,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 21 [2023-02-18 15:57:16,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182057252] [2023-02-18 15:57:16,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:16,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 15:57:16,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:16,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 15:57:16,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2023-02-18 15:57:16,538 INFO L87 Difference]: Start difference. First operand 216 states and 293 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 15:57:18,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:18,076 INFO L93 Difference]: Finished difference Result 324 states and 427 transitions. [2023-02-18 15:57:18,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-18 15:57:18,077 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 15:57:18,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:18,078 INFO L225 Difference]: With dead ends: 324 [2023-02-18 15:57:18,078 INFO L226 Difference]: Without dead ends: 288 [2023-02-18 15:57:18,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=523, Invalid=4169, Unknown=0, NotChecked=0, Total=4692 [2023-02-18 15:57:18,079 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 146 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:18,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 271 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 15:57:18,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-02-18 15:57:18,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 216. [2023-02-18 15:57:18,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.3348837209302327) internal successors, (287), 215 states have internal predecessors, (287), 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 15:57:18,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 287 transitions. [2023-02-18 15:57:18,155 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 287 transitions. Word has length 29 [2023-02-18 15:57:18,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:18,155 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 287 transitions. [2023-02-18 15:57:18,155 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 15:57:18,155 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 287 transitions. [2023-02-18 15:57:18,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 15:57:18,156 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:18,156 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:18,160 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 15:57:18,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:18,358 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:18,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:18,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1158099086, now seen corresponding path program 10 times [2023-02-18 15:57:18,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:18,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550090245] [2023-02-18 15:57:18,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:18,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 15:57:18,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:18,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550090245] [2023-02-18 15:57:18,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550090245] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:18,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026858352] [2023-02-18 15:57:18,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 15:57:18,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:18,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:18,485 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 15:57:18,487 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 15:57:18,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 15:57:18,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:18,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 57 conjunts are in the unsatisfiable core [2023-02-18 15:57:18,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:57:18,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:18,846 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-18 15:57:18,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026858352] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:18,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:18,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 12] total 33 [2023-02-18 15:57:18,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469264363] [2023-02-18 15:57:18,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:18,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 15:57:18,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:18,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 15:57:18,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 15:57:18,847 INFO L87 Difference]: Start difference. First operand 216 states and 287 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 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 15:57:21,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:21,026 INFO L93 Difference]: Finished difference Result 483 states and 649 transitions. [2023-02-18 15:57:21,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-02-18 15:57:21,027 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 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 29 [2023-02-18 15:57:21,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:21,028 INFO L225 Difference]: With dead ends: 483 [2023-02-18 15:57:21,028 INFO L226 Difference]: Without dead ends: 388 [2023-02-18 15:57:21,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 28 SyntacticMatches, 13 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2515 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1107, Invalid=7449, Unknown=0, NotChecked=0, Total=8556 [2023-02-18 15:57:21,033 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 137 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 1632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:21,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 742 Invalid, 1632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1385 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 15:57:21,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2023-02-18 15:57:21,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 234. [2023-02-18 15:57:21,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.3605150214592274) internal successors, (317), 233 states have internal predecessors, (317), 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 15:57:21,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 317 transitions. [2023-02-18 15:57:21,120 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 317 transitions. Word has length 29 [2023-02-18 15:57:21,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:21,120 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 317 transitions. [2023-02-18 15:57:21,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 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 15:57:21,121 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 317 transitions. [2023-02-18 15:57:21,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 15:57:21,121 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:21,121 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:21,126 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 15:57:21,326 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,SelfDestructingSolverStorable28 [2023-02-18 15:57:21,327 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:21,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:21,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1895449321, now seen corresponding path program 7 times [2023-02-18 15:57:21,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:21,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270216658] [2023-02-18 15:57:21,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:21,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:21,501 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:57:21,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:21,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270216658] [2023-02-18 15:57:21,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270216658] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:21,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245481494] [2023-02-18 15:57:21,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 15:57:21,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:21,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:21,509 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 15:57:21,588 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 15:57:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:21,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 15:57:21,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-18 15:57:21,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:21,719 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-18 15:57:21,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245481494] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:21,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:21,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 24 [2023-02-18 15:57:21,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291694651] [2023-02-18 15:57:21,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:21,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 15:57:21,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:21,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 15:57:21,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2023-02-18 15:57:21,720 INFO L87 Difference]: Start difference. First operand 234 states and 317 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 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 15:57:28,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:28,463 INFO L93 Difference]: Finished difference Result 427 states and 625 transitions. [2023-02-18 15:57:28,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2023-02-18 15:57:28,464 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 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 15:57:28,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:28,465 INFO L225 Difference]: With dead ends: 427 [2023-02-18 15:57:28,465 INFO L226 Difference]: Without dead ends: 383 [2023-02-18 15:57:28,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5390 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1445, Invalid=15067, Unknown=0, NotChecked=0, Total=16512 [2023-02-18 15:57:28,468 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 246 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1903 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 2092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:28,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 151 Invalid, 2092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1903 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-18 15:57:28,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2023-02-18 15:57:28,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 274. [2023-02-18 15:57:28,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 1.3553113553113554) internal successors, (370), 273 states have internal predecessors, (370), 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 15:57:28,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 370 transitions. [2023-02-18 15:57:28,582 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 370 transitions. Word has length 30 [2023-02-18 15:57:28,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:28,582 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 370 transitions. [2023-02-18 15:57:28,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 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 15:57:28,582 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 370 transitions. [2023-02-18 15:57:28,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 15:57:28,583 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:28,583 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:28,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-02-18 15:57:28,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:28,787 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:28,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:28,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1147675168, now seen corresponding path program 11 times [2023-02-18 15:57:28,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:28,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326525749] [2023-02-18 15:57:28,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:28,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 15:57:28,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:28,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326525749] [2023-02-18 15:57:28,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326525749] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:28,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915391640] [2023-02-18 15:57:28,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 15:57:28,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:28,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:28,919 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 15:57:28,936 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 15:57:29,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-18 15:57:29,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:29,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 63 conjunts are in the unsatisfiable core [2023-02-18 15:57:29,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:29,347 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:57:29,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-18 15:57:29,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915391640] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:29,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:29,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22, 13] total 36 [2023-02-18 15:57:29,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369486710] [2023-02-18 15:57:29,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:29,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-18 15:57:29,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:29,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-18 15:57:29,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1049, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 15:57:29,561 INFO L87 Difference]: Start difference. First operand 274 states and 370 transitions. Second operand has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 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 15:57:33,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:33,124 INFO L93 Difference]: Finished difference Result 599 states and 811 transitions. [2023-02-18 15:57:33,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-02-18 15:57:33,124 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 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 31 [2023-02-18 15:57:33,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:33,125 INFO L225 Difference]: With dead ends: 599 [2023-02-18 15:57:33,125 INFO L226 Difference]: Without dead ends: 459 [2023-02-18 15:57:33,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 29 SyntacticMatches, 14 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4078 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1418, Invalid=11692, Unknown=0, NotChecked=0, Total=13110 [2023-02-18 15:57:33,126 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 195 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 1419 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 1799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 1419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:33,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 799 Invalid, 1799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 1419 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-18 15:57:33,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2023-02-18 15:57:33,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 281. [2023-02-18 15:57:33,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.35) internal successors, (378), 280 states have internal predecessors, (378), 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 15:57:33,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 378 transitions. [2023-02-18 15:57:33,244 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 378 transitions. Word has length 31 [2023-02-18 15:57:33,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:33,244 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 378 transitions. [2023-02-18 15:57:33,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 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 15:57:33,245 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 378 transitions. [2023-02-18 15:57:33,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 15:57:33,245 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:33,245 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:33,260 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 15:57:33,450 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,SelfDestructingSolverStorable30 [2023-02-18 15:57:33,451 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:33,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:33,451 INFO L85 PathProgramCache]: Analyzing trace with hash 268339482, now seen corresponding path program 12 times [2023-02-18 15:57:33,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:33,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9757410] [2023-02-18 15:57:33,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:33,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 15:57:33,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:33,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9757410] [2023-02-18 15:57:33,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9757410] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:33,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961373120] [2023-02-18 15:57:33,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 15:57:33,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:33,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:33,625 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 15:57:33,627 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 15:57:33,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-18 15:57:33,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:33,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 15:57:33,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:33,739 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 15:57:33,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:33,814 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 15:57:33,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961373120] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:33,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:33,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 10 [2023-02-18 15:57:33,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354700642] [2023-02-18 15:57:33,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:33,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 15:57:33,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:33,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 15:57:33,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-02-18 15:57:33,815 INFO L87 Difference]: Start difference. First operand 281 states and 378 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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 15:57:33,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:33,998 INFO L93 Difference]: Finished difference Result 336 states and 464 transitions. [2023-02-18 15:57:33,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 15:57:33,999 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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 15:57:33,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:34,000 INFO L225 Difference]: With dead ends: 336 [2023-02-18 15:57:34,000 INFO L226 Difference]: Without dead ends: 306 [2023-02-18 15:57:34,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 19 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-02-18 15:57:34,001 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:34,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 93 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:57:34,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2023-02-18 15:57:34,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 265. [2023-02-18 15:57:34,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.3636363636363635) internal successors, (360), 264 states have internal predecessors, (360), 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 15:57:34,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 360 transitions. [2023-02-18 15:57:34,111 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 360 transitions. Word has length 32 [2023-02-18 15:57:34,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:34,112 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 360 transitions. [2023-02-18 15:57:34,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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 15:57:34,112 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 360 transitions. [2023-02-18 15:57:34,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 15:57:34,112 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:34,112 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:34,119 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 15:57:34,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:34,317 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:34,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:34,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1247012492, now seen corresponding path program 7 times [2023-02-18 15:57:34,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:34,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932603535] [2023-02-18 15:57:34,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:34,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:34,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-18 15:57:34,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:34,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932603535] [2023-02-18 15:57:34,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932603535] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:34,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807932469] [2023-02-18 15:57:34,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 15:57:34,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:34,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:34,465 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 15:57:34,467 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 15:57:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:34,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-18 15:57:34,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-18 15:57:34,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-18 15:57:34,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807932469] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:34,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:34,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 40 [2023-02-18 15:57:34,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245978786] [2023-02-18 15:57:34,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:34,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-18 15:57:34,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:34,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-18 15:57:34,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1355, Unknown=0, NotChecked=0, Total=1560 [2023-02-18 15:57:34,934 INFO L87 Difference]: Start difference. First operand 265 states and 360 transitions. Second operand has 40 states, 40 states have (on average 1.45) internal successors, (58), 40 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 15:57:40,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:40,198 INFO L93 Difference]: Finished difference Result 545 states and 725 transitions. [2023-02-18 15:57:40,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-02-18 15:57:40,198 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.45) internal successors, (58), 40 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 32 [2023-02-18 15:57:40,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:40,200 INFO L225 Difference]: With dead ends: 545 [2023-02-18 15:57:40,200 INFO L226 Difference]: Without dead ends: 456 [2023-02-18 15:57:40,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 33 SyntacticMatches, 9 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2136 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=756, Invalid=8174, Unknown=0, NotChecked=0, Total=8930 [2023-02-18 15:57:40,201 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 172 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 1925 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 2073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:40,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 931 Invalid, 2073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1925 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-02-18 15:57:40,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2023-02-18 15:57:40,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 281. [2023-02-18 15:57:40,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.3714285714285714) internal successors, (384), 280 states have internal predecessors, (384), 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 15:57:40,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 384 transitions. [2023-02-18 15:57:40,328 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 384 transitions. Word has length 32 [2023-02-18 15:57:40,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:40,328 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 384 transitions. [2023-02-18 15:57:40,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.45) internal successors, (58), 40 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 15:57:40,329 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 384 transitions. [2023-02-18 15:57:40,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 15:57:40,329 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:40,329 INFO L195 NwaCegarLoop]: trace histogram [11, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:40,334 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 15:57:40,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:40,534 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:40,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:40,535 INFO L85 PathProgramCache]: Analyzing trace with hash 660075483, now seen corresponding path program 13 times [2023-02-18 15:57:40,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:40,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542608286] [2023-02-18 15:57:40,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:40,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 15:57:40,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:40,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542608286] [2023-02-18 15:57:40,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542608286] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:40,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721315094] [2023-02-18 15:57:40,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 15:57:40,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:40,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:40,710 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 15:57:40,711 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 15:57:40,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:40,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 15:57:40,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:40,878 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 15:57:40,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-02-18 15:57:40,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721315094] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:40,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:40,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 8] total 27 [2023-02-18 15:57:40,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448593568] [2023-02-18 15:57:40,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:40,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 15:57:40,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:40,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 15:57:40,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2023-02-18 15:57:40,971 INFO L87 Difference]: Start difference. First operand 281 states and 384 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 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 15:57:41,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:41,954 INFO L93 Difference]: Finished difference Result 687 states and 914 transitions. [2023-02-18 15:57:41,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-18 15:57:41,955 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 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 15:57:41,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:41,964 INFO L225 Difference]: With dead ends: 687 [2023-02-18 15:57:41,964 INFO L226 Difference]: Without dead ends: 555 [2023-02-18 15:57:41,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 44 SyntacticMatches, 14 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=398, Invalid=1242, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 15:57:41,965 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 200 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:41,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 1120 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1456 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 15:57:41,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2023-02-18 15:57:42,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 300. [2023-02-18 15:57:42,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 1.3244147157190636) internal successors, (396), 299 states have internal predecessors, (396), 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 15:57:42,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 396 transitions. [2023-02-18 15:57:42,094 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 396 transitions. Word has length 32 [2023-02-18 15:57:42,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:42,094 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 396 transitions. [2023-02-18 15:57:42,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 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 15:57:42,094 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 396 transitions. [2023-02-18 15:57:42,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-18 15:57:42,095 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:42,095 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:42,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-18 15:57:42,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:42,300 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:42,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:42,300 INFO L85 PathProgramCache]: Analyzing trace with hash 2061592607, now seen corresponding path program 14 times [2023-02-18 15:57:42,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:42,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663924072] [2023-02-18 15:57:42,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:42,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 15:57:42,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:42,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663924072] [2023-02-18 15:57:42,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663924072] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:42,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926275230] [2023-02-18 15:57:42,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 15:57:42,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:42,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:42,467 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:57:42,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-18 15:57:42,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 15:57:42,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:42,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 15:57:42,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:42,590 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-18 15:57:42,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:42,638 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-18 15:57:42,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926275230] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:42,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:42,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 18 [2023-02-18 15:57:42,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857704822] [2023-02-18 15:57:42,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:42,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 15:57:42,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:42,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 15:57:42,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-02-18 15:57:42,639 INFO L87 Difference]: Start difference. First operand 300 states and 396 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 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 15:57:42,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:42,980 INFO L93 Difference]: Finished difference Result 381 states and 514 transitions. [2023-02-18 15:57:42,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 15:57:42,981 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 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 15:57:42,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:42,982 INFO L225 Difference]: With dead ends: 381 [2023-02-18 15:57:42,982 INFO L226 Difference]: Without dead ends: 355 [2023-02-18 15:57:42,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2023-02-18 15:57:42,983 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 60 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:42,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 143 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:57:42,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2023-02-18 15:57:43,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355. [2023-02-18 15:57:43,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.305084745762712) internal successors, (462), 354 states have internal predecessors, (462), 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 15:57:43,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 462 transitions. [2023-02-18 15:57:43,112 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 462 transitions. Word has length 33 [2023-02-18 15:57:43,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:43,112 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 462 transitions. [2023-02-18 15:57:43,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 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 15:57:43,112 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 462 transitions. [2023-02-18 15:57:43,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-18 15:57:43,113 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:43,113 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:43,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-18 15:57:43,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-02-18 15:57:43,318 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:43,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:43,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1397949023, now seen corresponding path program 8 times [2023-02-18 15:57:43,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:43,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410844759] [2023-02-18 15:57:43,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:43,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:43,474 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:57:43,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:43,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410844759] [2023-02-18 15:57:43,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410844759] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:43,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058843995] [2023-02-18 15:57:43,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 15:57:43,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:43,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:43,476 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:57:43,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-18 15:57:43,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 15:57:43,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:43,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 15:57:43,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:43,674 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-18 15:57:43,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:43,677 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-18 15:57:43,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058843995] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:43,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:43,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 27 [2023-02-18 15:57:43,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428087139] [2023-02-18 15:57:43,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:43,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 15:57:43,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:43,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 15:57:43,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2023-02-18 15:57:43,678 INFO L87 Difference]: Start difference. First operand 355 states and 462 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 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 15:57:57,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:57,728 INFO L93 Difference]: Finished difference Result 529 states and 736 transitions. [2023-02-18 15:57:57,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2023-02-18 15:57:57,729 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 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 15:57:57,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:57,731 INFO L225 Difference]: With dead ends: 529 [2023-02-18 15:57:57,731 INFO L226 Difference]: Without dead ends: 477 [2023-02-18 15:57:57,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7679 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=1882, Invalid=21070, Unknown=0, NotChecked=0, Total=22952 [2023-02-18 15:57:57,733 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 300 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 2509 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 2509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:57,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 195 Invalid, 2734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 2509 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-02-18 15:57:57,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2023-02-18 15:57:57,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 366. [2023-02-18 15:57:57,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 1.295890410958904) internal successors, (473), 365 states have internal predecessors, (473), 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 15:57:57,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 473 transitions. [2023-02-18 15:57:57,879 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 473 transitions. Word has length 33 [2023-02-18 15:57:57,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:57,879 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 473 transitions. [2023-02-18 15:57:57,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 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 15:57:57,879 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 473 transitions. [2023-02-18 15:57:57,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 15:57:57,880 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:57,880 INFO L195 NwaCegarLoop]: trace histogram [12, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:57,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-18 15:57:58,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-02-18 15:57:58,085 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:58,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:58,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1387409899, now seen corresponding path program 15 times [2023-02-18 15:57:58,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:58,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729330749] [2023-02-18 15:57:58,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:58,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 15:57:58,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:58,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729330749] [2023-02-18 15:57:58,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729330749] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:58,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509942810] [2023-02-18 15:57:58,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 15:57:58,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:58,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:58,253 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:57:58,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-18 15:57:58,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 15:57:58,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:58,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-18 15:57:58,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:58,522 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-02-18 15:57:58,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-18 15:57:58,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509942810] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:58,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:58,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11, 15] total 40 [2023-02-18 15:57:58,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325666866] [2023-02-18 15:57:58,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:58,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-18 15:57:58,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:58,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-18 15:57:58,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1411, Unknown=0, NotChecked=0, Total=1560 [2023-02-18 15:57:58,859 INFO L87 Difference]: Start difference. First operand 366 states and 473 transitions. Second operand has 40 states, 40 states have (on average 1.675) internal successors, (67), 40 states have internal predecessors, (67), 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 15:58:06,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:58:06,217 INFO L93 Difference]: Finished difference Result 827 states and 1083 transitions. [2023-02-18 15:58:06,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2023-02-18 15:58:06,217 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.675) internal successors, (67), 40 states have internal predecessors, (67), 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 15:58:06,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:58:06,219 INFO L225 Difference]: With dead ends: 827 [2023-02-18 15:58:06,219 INFO L226 Difference]: Without dead ends: 670 [2023-02-18 15:58:06,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10352 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3138, Invalid=30168, Unknown=0, NotChecked=0, Total=33306 [2023-02-18 15:58:06,220 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 258 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 4222 mSolverCounterSat, 612 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 1337 SdHoareTripleChecker+Invalid, 4834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 612 IncrementalHoareTripleChecker+Valid, 4222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-02-18 15:58:06,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 1337 Invalid, 4834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [612 Valid, 4222 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-02-18 15:58:06,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2023-02-18 15:58:06,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 355. [2023-02-18 15:58:06,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.3333333333333333) internal successors, (472), 354 states have internal predecessors, (472), 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 15:58:06,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 472 transitions. [2023-02-18 15:58:06,406 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 472 transitions. Word has length 34 [2023-02-18 15:58:06,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:58:06,406 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 472 transitions. [2023-02-18 15:58:06,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.675) internal successors, (67), 40 states have internal predecessors, (67), 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 15:58:06,406 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 472 transitions. [2023-02-18 15:58:06,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 15:58:06,407 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:58:06,407 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:58:06,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-18 15:58:06,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:58:06,612 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:58:06,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:58:06,613 INFO L85 PathProgramCache]: Analyzing trace with hash -2117886592, now seen corresponding path program 8 times [2023-02-18 15:58:06,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:58:06,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617655405] [2023-02-18 15:58:06,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:58:06,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:58:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:58:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-18 15:58:06,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:58:06,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617655405] [2023-02-18 15:58:06,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617655405] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:58:06,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674307689] [2023-02-18 15:58:06,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 15:58:06,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:58:06,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:58:06,802 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:58:06,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-18 15:58:06,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 15:58:06,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:58:06,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-18 15:58:06,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:58:06,991 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-18 15:58:06,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:58:07,389 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 15:58:07,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674307689] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:58:07,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:58:07,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 20] total 45 [2023-02-18 15:58:07,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986282635] [2023-02-18 15:58:07,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:58:07,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-18 15:58:07,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:58:07,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-18 15:58:07,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1731, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 15:58:07,391 INFO L87 Difference]: Start difference. First operand 355 states and 472 transitions. Second operand has 45 states, 45 states have (on average 1.4) internal successors, (63), 45 states have internal predecessors, (63), 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 15:58:18,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:58:18,911 INFO L93 Difference]: Finished difference Result 678 states and 883 transitions. [2023-02-18 15:58:18,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2023-02-18 15:58:18,911 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.4) internal successors, (63), 45 states have internal predecessors, (63), 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 15:58:18,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:58:18,913 INFO L225 Difference]: With dead ends: 678 [2023-02-18 15:58:18,913 INFO L226 Difference]: Without dead ends: 549 [2023-02-18 15:58:18,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 35 SyntacticMatches, 10 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4694 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1187, Invalid=15843, Unknown=0, NotChecked=0, Total=17030 [2023-02-18 15:58:18,922 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 275 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 2384 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 2651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 2384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:58:18,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 1086 Invalid, 2651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 2384 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-02-18 15:58:18,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2023-02-18 15:58:19,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 347. [2023-02-18 15:58:19,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.323699421965318) internal successors, (458), 346 states have internal predecessors, (458), 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 15:58:19,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 458 transitions. [2023-02-18 15:58:19,097 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 458 transitions. Word has length 35 [2023-02-18 15:58:19,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:58:19,097 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 458 transitions. [2023-02-18 15:58:19,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.4) internal successors, (63), 45 states have internal predecessors, (63), 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 15:58:19,097 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 458 transitions. [2023-02-18 15:58:19,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 15:58:19,098 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:58:19,098 INFO L195 NwaCegarLoop]: trace histogram [13, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:58:19,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-02-18 15:58:19,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-02-18 15:58:19,303 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:58:19,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:58:19,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1067078896, now seen corresponding path program 9 times [2023-02-18 15:58:19,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:58:19,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657539022] [2023-02-18 15:58:19,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:58:19,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:58:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:58:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 15:58:19,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:58:19,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657539022] [2023-02-18 15:58:19,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657539022] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:58:19,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948096381] [2023-02-18 15:58:19,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 15:58:19,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:58:19,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:58:19,489 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:58:19,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-18 15:58:19,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 15:58:19,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:58:19,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 15:58:19,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:58:19,703 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-02-18 15:58:19,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:58:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-02-18 15:58:19,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948096381] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:58:19,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:58:19,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 10] total 32 [2023-02-18 15:58:19,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726652539] [2023-02-18 15:58:19,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:58:19,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-18 15:58:19,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:58:19,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-18 15:58:19,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2023-02-18 15:58:19,802 INFO L87 Difference]: Start difference. First operand 347 states and 458 transitions. Second operand has 32 states, 32 states have (on average 1.4375) internal successors, (46), 32 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 15:58:24,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:58:24,167 INFO L93 Difference]: Finished difference Result 739 states and 965 transitions. [2023-02-18 15:58:24,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2023-02-18 15:58:24,167 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.4375) internal successors, (46), 32 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 35 [2023-02-18 15:58:24,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:58:24,169 INFO L225 Difference]: With dead ends: 739 [2023-02-18 15:58:24,169 INFO L226 Difference]: Without dead ends: 586 [2023-02-18 15:58:24,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5490 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1132, Invalid=17500, Unknown=0, NotChecked=0, Total=18632 [2023-02-18 15:58:24,173 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 224 mSDsluCounter, 1411 mSDsCounter, 0 mSdLazyCounter, 2851 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1488 SdHoareTripleChecker+Invalid, 3054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 2851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-18 15:58:24,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 1488 Invalid, 3054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 2851 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-18 15:58:24,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2023-02-18 15:58:24,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 353. [2023-02-18 15:58:24,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.3125) internal successors, (462), 352 states have internal predecessors, (462), 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 15:58:24,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 462 transitions. [2023-02-18 15:58:24,401 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 462 transitions. Word has length 35 [2023-02-18 15:58:24,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:58:24,402 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 462 transitions. [2023-02-18 15:58:24,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.4375) internal successors, (46), 32 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 15:58:24,402 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 462 transitions. [2023-02-18 15:58:24,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 15:58:24,402 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:58:24,403 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:58:24,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-02-18 15:58:24,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-02-18 15:58:24,608 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:58:24,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:58:24,608 INFO L85 PathProgramCache]: Analyzing trace with hash 63327017, now seen corresponding path program 9 times [2023-02-18 15:58:24,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:58:24,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153410156] [2023-02-18 15:58:24,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:58:24,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:58:24,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:58:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:58:24,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:58:24,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153410156] [2023-02-18 15:58:24,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153410156] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:58:24,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765966962] [2023-02-18 15:58:24,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 15:58:24,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:58:24,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:58:24,845 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:58:24,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-18 15:58:24,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-18 15:58:24,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:58:24,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-18 15:58:24,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:58:25,208 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:58:25,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:58:25,601 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 15:58:25,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765966962] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:58:25,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:58:25,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28, 19] total 48 [2023-02-18 15:58:25,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713220328] [2023-02-18 15:58:25,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:58:25,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-18 15:58:25,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:58:25,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-18 15:58:25,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=1805, Unknown=0, NotChecked=0, Total=2256 [2023-02-18 15:58:25,602 INFO L87 Difference]: Start difference. First operand 353 states and 462 transitions. Second operand has 48 states, 48 states have (on average 1.5625) internal successors, (75), 48 states have internal predecessors, (75), 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 15:58:30,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:58:30,800 INFO L93 Difference]: Finished difference Result 791 states and 1159 transitions. [2023-02-18 15:58:30,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2023-02-18 15:58:30,800 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.5625) internal successors, (75), 48 states have internal predecessors, (75), 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 15:58:30,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:58:30,802 INFO L225 Difference]: With dead ends: 791 [2023-02-18 15:58:30,802 INFO L226 Difference]: Without dead ends: 733 [2023-02-18 15:58:30,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 38 SyntacticMatches, 15 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7433 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4905, Invalid=17445, Unknown=0, NotChecked=0, Total=22350 [2023-02-18 15:58:30,803 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 562 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 3691 mSolverCounterSat, 595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 4286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 595 IncrementalHoareTripleChecker+Valid, 3691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-18 15:58:30,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 763 Invalid, 4286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [595 Valid, 3691 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-18 15:58:30,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2023-02-18 15:58:31,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 371. [2023-02-18 15:58:31,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.3324324324324324) internal successors, (493), 370 states have internal predecessors, (493), 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 15:58:31,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 493 transitions. [2023-02-18 15:58:31,003 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 493 transitions. Word has length 36 [2023-02-18 15:58:31,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:58:31,003 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 493 transitions. [2023-02-18 15:58:31,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.5625) internal successors, (75), 48 states have internal predecessors, (75), 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 15:58:31,004 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 493 transitions. [2023-02-18 15:58:31,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 15:58:31,004 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:58:31,004 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:58:31,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-02-18 15:58:31,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-18 15:58:31,209 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:58:31,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:58:31,210 INFO L85 PathProgramCache]: Analyzing trace with hash 794730143, now seen corresponding path program 16 times [2023-02-18 15:58:31,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:58:31,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875475059] [2023-02-18 15:58:31,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:58:31,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:58:31,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:58:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-18 15:58:31,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:58:31,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875475059] [2023-02-18 15:58:31,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875475059] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:58:31,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178545978] [2023-02-18 15:58:31,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 15:58:31,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:58:31,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:58:31,412 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:58:31,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-02-18 15:58:31,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 15:58:31,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:58:31,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 15:58:31,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:58:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-18 15:58:31,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:58:31,650 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-18 15:58:31,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178545978] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:58:31,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:58:31,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 12 [2023-02-18 15:58:31,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091776978] [2023-02-18 15:58:31,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:58:31,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 15:58:31,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:58:31,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 15:58:31,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-02-18 15:58:31,652 INFO L87 Difference]: Start difference. First operand 371 states and 493 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 15:58:31,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:58:31,967 INFO L93 Difference]: Finished difference Result 539 states and 747 transitions. [2023-02-18 15:58:31,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 15:58:31,967 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 37 [2023-02-18 15:58:31,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:58:31,969 INFO L225 Difference]: With dead ends: 539 [2023-02-18 15:58:31,969 INFO L226 Difference]: Without dead ends: 476 [2023-02-18 15:58:31,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 56 SyntacticMatches, 24 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-02-18 15:58:31,969 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:58:31,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 93 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:58:31,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2023-02-18 15:58:32,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 355. [2023-02-18 15:58:32,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.3418079096045197) internal successors, (475), 354 states have internal predecessors, (475), 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 15:58:32,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 475 transitions. [2023-02-18 15:58:32,164 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 475 transitions. Word has length 37 [2023-02-18 15:58:32,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:58:32,164 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 475 transitions. [2023-02-18 15:58:32,164 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 15:58:32,164 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 475 transitions. [2023-02-18 15:58:32,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 15:58:32,165 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:58:32,165 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:58:32,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-02-18 15:58:32,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:58:32,370 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:58:32,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:58:32,370 INFO L85 PathProgramCache]: Analyzing trace with hash 839547706, now seen corresponding path program 17 times [2023-02-18 15:58:32,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:58:32,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118907214] [2023-02-18 15:58:32,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:58:32,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:58:32,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:58:32,492 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-02-18 15:58:32,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:58:32,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118907214] [2023-02-18 15:58:32,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118907214] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:58:32,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088450256] [2023-02-18 15:58:32,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 15:58:32,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:58:32,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:58:32,502 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:58:32,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-02-18 15:58:32,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-18 15:58:32,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:58:32,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-18 15:58:32,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:58:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-02-18 15:58:32,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:58:33,086 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-02-18 15:58:33,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088450256] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:58:33,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:58:33,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2023-02-18 15:58:33,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336974858] [2023-02-18 15:58:33,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:58:33,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 15:58:33,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:58:33,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 15:58:33,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2023-02-18 15:58:33,087 INFO L87 Difference]: Start difference. First operand 355 states and 475 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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 15:58:34,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:58:34,151 INFO L93 Difference]: Finished difference Result 728 states and 1014 transitions. [2023-02-18 15:58:34,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-18 15:58:34,151 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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 15:58:34,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:58:34,153 INFO L225 Difference]: With dead ends: 728 [2023-02-18 15:58:34,153 INFO L226 Difference]: Without dead ends: 670 [2023-02-18 15:58:34,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 62 SyntacticMatches, 11 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=338, Invalid=784, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 15:58:34,154 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 118 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 15:58:34,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 158 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 15:58:34,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2023-02-18 15:58:34,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 568. [2023-02-18 15:58:34,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 1.3580246913580247) internal successors, (770), 567 states have internal predecessors, (770), 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 15:58:34,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 770 transitions. [2023-02-18 15:58:34,436 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 770 transitions. Word has length 38 [2023-02-18 15:58:34,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:58:34,436 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 770 transitions. [2023-02-18 15:58:34,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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 15:58:34,436 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 770 transitions. [2023-02-18 15:58:34,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 15:58:34,437 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:58:34,437 INFO L195 NwaCegarLoop]: trace histogram [14, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:58:34,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-02-18 15:58:34,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:58:34,642 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:58:34,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:58:34,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1812828000, now seen corresponding path program 18 times [2023-02-18 15:58:34,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:58:34,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662489487] [2023-02-18 15:58:34,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:58:34,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:58:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:58:34,867 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-18 15:58:34,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:58:34,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662489487] [2023-02-18 15:58:34,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662489487] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:58:34,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508754534] [2023-02-18 15:58:34,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 15:58:34,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:58:34,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:58:34,869 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:58:34,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-02-18 15:58:34,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-18 15:58:34,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:58:34,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-18 15:58:34,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:58:35,231 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-02-18 15:58:35,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:58:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-02-18 15:58:35,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508754534] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:58:35,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:58:35,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 17] total 47 [2023-02-18 15:58:35,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646552474] [2023-02-18 15:58:35,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:58:35,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-18 15:58:35,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:58:35,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-18 15:58:35,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1978, Unknown=0, NotChecked=0, Total=2162 [2023-02-18 15:58:35,654 INFO L87 Difference]: Start difference. First operand 568 states and 770 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 47 states have internal predecessors, (76), 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 15:58:49,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:58:49,573 INFO L93 Difference]: Finished difference Result 1281 states and 1754 transitions. [2023-02-18 15:58:49,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2023-02-18 15:58:49,573 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 47 states have internal predecessors, (76), 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 39 [2023-02-18 15:58:49,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:58:49,575 INFO L225 Difference]: With dead ends: 1281 [2023-02-18 15:58:49,575 INFO L226 Difference]: Without dead ends: 1078 [2023-02-18 15:58:49,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 46 SyntacticMatches, 8 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17221 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=4949, Invalid=48181, Unknown=0, NotChecked=0, Total=53130 [2023-02-18 15:58:49,578 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 324 mSDsluCounter, 1720 mSDsCounter, 0 mSdLazyCounter, 6229 mSolverCounterSat, 959 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1787 SdHoareTripleChecker+Invalid, 7188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 959 IncrementalHoareTripleChecker+Valid, 6229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-02-18 15:58:49,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 1787 Invalid, 7188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [959 Valid, 6229 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-02-18 15:58:49,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2023-02-18 15:58:49,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 519. [2023-02-18 15:58:49,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 1.4131274131274132) internal successors, (732), 518 states have internal predecessors, (732), 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 15:58:49,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 732 transitions. [2023-02-18 15:58:49,906 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 732 transitions. Word has length 39 [2023-02-18 15:58:49,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:58:49,906 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 732 transitions. [2023-02-18 15:58:49,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 47 states have internal predecessors, (76), 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 15:58:49,906 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 732 transitions. [2023-02-18 15:58:49,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-18 15:58:49,907 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:58:49,907 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:58:49,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-02-18 15:58:50,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-02-18 15:58:50,112 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:58:50,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:58:50,112 INFO L85 PathProgramCache]: Analyzing trace with hash 2036961390, now seen corresponding path program 10 times [2023-02-18 15:58:50,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:58:50,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136910063] [2023-02-18 15:58:50,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:58:50,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:58:50,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:58:50,337 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-18 15:58:50,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:58:50,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136910063] [2023-02-18 15:58:50,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136910063] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:58:50,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315425869] [2023-02-18 15:58:50,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 15:58:50,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:58:50,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:58:50,339 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:58:50,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-02-18 15:58:50,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 15:58:50,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:58:50,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-18 15:58:50,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:58:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-18 15:58:50,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:58:50,573 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-18 15:58:50,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315425869] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:58:50,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:58:50,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 11] total 30 [2023-02-18 15:58:50,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059230319] [2023-02-18 15:58:50,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:58:50,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-18 15:58:50,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:58:50,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-18 15:58:50,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=805, Unknown=0, NotChecked=0, Total=870 [2023-02-18 15:58:50,580 INFO L87 Difference]: Start difference. First operand 519 states and 732 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 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 15:58:58,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:58:58,589 INFO L93 Difference]: Finished difference Result 791 states and 1062 transitions. [2023-02-18 15:58:58,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-02-18 15:58:58,590 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 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 41 [2023-02-18 15:58:58,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:58:58,592 INFO L225 Difference]: With dead ends: 791 [2023-02-18 15:58:58,592 INFO L226 Difference]: Without dead ends: 730 [2023-02-18 15:58:58,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3878 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1131, Invalid=12675, Unknown=0, NotChecked=0, Total=13806 [2023-02-18 15:58:58,593 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 233 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 1869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-02-18 15:58:58,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 523 Invalid, 1869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1703 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-02-18 15:58:58,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2023-02-18 15:58:58,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 569. [2023-02-18 15:58:58,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 1.3838028169014085) internal successors, (786), 568 states have internal predecessors, (786), 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 15:58:58,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 786 transitions. [2023-02-18 15:58:58,919 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 786 transitions. Word has length 41 [2023-02-18 15:58:58,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:58:58,919 INFO L495 AbstractCegarLoop]: Abstraction has 569 states and 786 transitions. [2023-02-18 15:58:58,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 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 15:58:58,920 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 786 transitions. [2023-02-18 15:58:58,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-18 15:58:58,920 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:58:58,921 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:58:58,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-02-18 15:58:59,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-02-18 15:58:59,126 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:58:59,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:58:59,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1208465951, now seen corresponding path program 10 times [2023-02-18 15:58:59,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:58:59,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980509552] [2023-02-18 15:58:59,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:58:59,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:58:59,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:58:59,370 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 20 proven. 90 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-02-18 15:58:59,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:58:59,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980509552] [2023-02-18 15:58:59,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980509552] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:58:59,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140811657] [2023-02-18 15:58:59,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 15:58:59,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:58:59,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:58:59,373 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:58:59,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-02-18 15:58:59,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 15:58:59,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:58:59,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-18 15:58:59,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:58:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 20 proven. 90 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-02-18 15:58:59,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:59:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 20 proven. 90 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-02-18 15:59:00,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140811657] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:59:00,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:59:00,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 52 [2023-02-18 15:59:00,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999019609] [2023-02-18 15:59:00,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:59:00,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-18 15:59:00,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:59:00,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-18 15:59:00,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2231, Unknown=0, NotChecked=0, Total=2652 [2023-02-18 15:59:00,141 INFO L87 Difference]: Start difference. First operand 569 states and 786 transitions. Second operand has 52 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 52 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 15:59:51,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:59:51,352 INFO L93 Difference]: Finished difference Result 2078 states and 2763 transitions. [2023-02-18 15:59:51,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 394 states. [2023-02-18 15:59:51,352 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 52 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) Word has length 41 [2023-02-18 15:59:51,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:59:51,356 INFO L225 Difference]: With dead ends: 2078 [2023-02-18 15:59:51,356 INFO L226 Difference]: Without dead ends: 1819 [2023-02-18 15:59:51,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 52 SyntacticMatches, 9 SemanticMatches, 392 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64377 ImplicationChecksByTransitivity, 43.1s TimeCoverageRelationStatistics Valid=15440, Invalid=139402, Unknown=0, NotChecked=0, Total=154842 [2023-02-18 15:59:51,362 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 1447 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 3486 mSolverCounterSat, 1826 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1447 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 5312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1826 IncrementalHoareTripleChecker+Valid, 3486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:59:51,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1447 Valid, 947 Invalid, 5312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1826 Valid, 3486 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2023-02-18 15:59:51,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1819 states. [2023-02-18 15:59:51,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1819 to 892. [2023-02-18 15:59:51,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 1.4118967452300786) internal successors, (1258), 891 states have internal predecessors, (1258), 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 15:59:51,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1258 transitions. [2023-02-18 15:59:51,855 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1258 transitions. Word has length 41 [2023-02-18 15:59:51,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:59:51,855 INFO L495 AbstractCegarLoop]: Abstraction has 892 states and 1258 transitions. [2023-02-18 15:59:51,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 52 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 15:59:51,855 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1258 transitions. [2023-02-18 15:59:51,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-18 15:59:51,856 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:59:51,856 INFO L195 NwaCegarLoop]: trace histogram [15, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:59:51,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-02-18 15:59:52,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-02-18 15:59:52,062 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:59:52,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:59:52,062 INFO L85 PathProgramCache]: Analyzing trace with hash 725896857, now seen corresponding path program 19 times [2023-02-18 15:59:52,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:59:52,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244263817] [2023-02-18 15:59:52,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:59:52,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:59:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:59:52,320 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-18 15:59:52,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:59:52,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244263817] [2023-02-18 15:59:52,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244263817] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:59:52,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366312802] [2023-02-18 15:59:52,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 15:59:52,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:59:52,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:59:52,321 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:59:52,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-02-18 15:59:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:59:52,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-18 15:59:52,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:59:52,595 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-18 15:59:52,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:59:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2023-02-18 15:59:52,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366312802] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:59:52,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:59:52,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 10] total 36 [2023-02-18 15:59:52,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710609658] [2023-02-18 15:59:52,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:59:52,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-18 15:59:52,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:59:52,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-18 15:59:52,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 15:59:52,749 INFO L87 Difference]: Start difference. First operand 892 states and 1258 transitions. Second operand has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 36 states have internal predecessors, (59), 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 15:59:55,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:59:55,388 INFO L93 Difference]: Finished difference Result 1437 states and 1952 transitions. [2023-02-18 15:59:55,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-02-18 15:59:55,388 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 36 states have internal predecessors, (59), 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 42 [2023-02-18 15:59:55,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:59:55,391 INFO L225 Difference]: With dead ends: 1437 [2023-02-18 15:59:55,391 INFO L226 Difference]: Without dead ends: 1332 [2023-02-18 15:59:55,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 57 SyntacticMatches, 19 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1001, Invalid=3289, Unknown=0, NotChecked=0, Total=4290 [2023-02-18 15:59:55,392 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 396 mSDsluCounter, 1378 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 1468 SdHoareTripleChecker+Invalid, 2113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 15:59:55,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 1468 Invalid, 2113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 1948 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 15:59:55,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2023-02-18 15:59:55,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 946. [2023-02-18 15:59:55,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 945 states have (on average 1.3417989417989418) internal successors, (1268), 945 states have internal predecessors, (1268), 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 15:59:55,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1268 transitions. [2023-02-18 15:59:55,989 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1268 transitions. Word has length 42 [2023-02-18 15:59:55,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:59:55,990 INFO L495 AbstractCegarLoop]: Abstraction has 946 states and 1268 transitions. [2023-02-18 15:59:55,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 36 states have internal predecessors, (59), 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 15:59:55,990 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1268 transitions. [2023-02-18 15:59:55,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 15:59:55,991 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:59:55,991 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:59:55,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-02-18 15:59:56,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-02-18 15:59:56,196 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:59:56,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:59:56,196 INFO L85 PathProgramCache]: Analyzing trace with hash 181315855, now seen corresponding path program 11 times [2023-02-18 15:59:56,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:59:56,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603136326] [2023-02-18 15:59:56,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:59:56,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:59:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:59:56,443 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-18 15:59:56,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:59:56,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603136326] [2023-02-18 15:59:56,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603136326] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:59:56,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558629291] [2023-02-18 15:59:56,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 15:59:56,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:59:56,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:59:56,445 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:59:56,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-02-18 16:00:01,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-02-18 16:00:01,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:00:01,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-18 16:00:01,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:00:01,520 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-18 16:00:01,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:00:02,300 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-18 16:00:02,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558629291] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:00:02,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:00:02,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 27] total 61 [2023-02-18 16:00:02,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378820079] [2023-02-18 16:00:02,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:00:02,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-02-18 16:00:02,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:00:02,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-02-18 16:00:02,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=3229, Unknown=0, NotChecked=0, Total=3660 [2023-02-18 16:00:02,302 INFO L87 Difference]: Start difference. First operand 946 states and 1268 transitions. Second operand has 61 states, 61 states have (on average 1.2950819672131149) internal successors, (79), 61 states have internal predecessors, (79), 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 16:00:34,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 16:01:10,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:01:10,927 INFO L93 Difference]: Finished difference Result 1597 states and 2130 transitions. [2023-02-18 16:01:10,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2023-02-18 16:01:10,927 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.2950819672131149) internal successors, (79), 61 states have internal predecessors, (79), 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 43 [2023-02-18 16:01:10,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:01:10,931 INFO L225 Difference]: With dead ends: 1597 [2023-02-18 16:01:10,931 INFO L226 Difference]: Without dead ends: 1355 [2023-02-18 16:01:10,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14853 ImplicationChecksByTransitivity, 45.0s TimeCoverageRelationStatistics Valid=2960, Invalid=44346, Unknown=0, NotChecked=0, Total=47306 [2023-02-18 16:01:10,934 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 670 mSDsluCounter, 1935 mSDsCounter, 0 mSdLazyCounter, 6492 mSolverCounterSat, 1447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 2020 SdHoareTripleChecker+Invalid, 7939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1447 IncrementalHoareTripleChecker+Valid, 6492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:01:10,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 2020 Invalid, 7939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1447 Valid, 6492 Invalid, 0 Unknown, 0 Unchecked, 23.3s Time] [2023-02-18 16:01:10,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2023-02-18 16:01:11,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 953. [2023-02-18 16:01:11,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 1.3371848739495797) internal successors, (1273), 952 states have internal predecessors, (1273), 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 16:01:11,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1273 transitions. [2023-02-18 16:01:11,524 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1273 transitions. Word has length 43 [2023-02-18 16:01:11,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:01:11,524 INFO L495 AbstractCegarLoop]: Abstraction has 953 states and 1273 transitions. [2023-02-18 16:01:11,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.2950819672131149) internal successors, (79), 61 states have internal predecessors, (79), 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 16:01:11,525 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1273 transitions. [2023-02-18 16:01:11,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-18 16:01:11,526 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:01:11,526 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:01:11,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-02-18 16:01:11,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:01:11,733 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:01:11,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:01:11,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1588764775, now seen corresponding path program 20 times [2023-02-18 16:01:11,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:01:11,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408264078] [2023-02-18 16:01:11,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:01:11,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:01:11,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:01:11,967 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 28 proven. 43 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-18 16:01:11,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:01:11,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408264078] [2023-02-18 16:01:11,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408264078] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:01:11,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890038677] [2023-02-18 16:01:11,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:01:11,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:01:11,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:01:11,979 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:01:11,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-02-18 16:01:12,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:01:12,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:01:12,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 16:01:12,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:01:12,213 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-02-18 16:01:12,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:01:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-02-18 16:01:12,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890038677] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:01:12,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:01:12,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 24 [2023-02-18 16:01:12,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95762692] [2023-02-18 16:01:12,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:01:12,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 16:01:12,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:01:12,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 16:01:12,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2023-02-18 16:01:12,328 INFO L87 Difference]: Start difference. First operand 953 states and 1273 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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 16:01:14,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 16:01:15,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:01:15,370 INFO L93 Difference]: Finished difference Result 1111 states and 1470 transitions. [2023-02-18 16:01:15,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-18 16:01:15,370 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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 44 [2023-02-18 16:01:15,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:01:15,373 INFO L225 Difference]: With dead ends: 1111 [2023-02-18 16:01:15,373 INFO L226 Difference]: Without dead ends: 1077 [2023-02-18 16:01:15,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 68 SyntacticMatches, 17 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=451, Invalid=1805, Unknown=0, NotChecked=0, Total=2256 [2023-02-18 16:01:15,374 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 90 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-02-18 16:01:15,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 132 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-02-18 16:01:15,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2023-02-18 16:01:15,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 899. [2023-02-18 16:01:15,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 1.3385300668151447) internal successors, (1202), 898 states have internal predecessors, (1202), 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 16:01:15,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1202 transitions. [2023-02-18 16:01:15,933 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1202 transitions. Word has length 44 [2023-02-18 16:01:15,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:01:15,933 INFO L495 AbstractCegarLoop]: Abstraction has 899 states and 1202 transitions. [2023-02-18 16:01:15,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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 16:01:15,933 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1202 transitions. [2023-02-18 16:01:15,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-18 16:01:15,934 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:01:15,934 INFO L195 NwaCegarLoop]: trace histogram [16, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:01:15,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-02-18 16:01:16,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-02-18 16:01:16,139 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:01:16,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:01:16,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1068642537, now seen corresponding path program 21 times [2023-02-18 16:01:16,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:01:16,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632469425] [2023-02-18 16:01:16,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:01:16,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:01:16,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:01:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-18 16:01:16,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:01:16,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632469425] [2023-02-18 16:01:16,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632469425] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:01:16,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488837265] [2023-02-18 16:01:16,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:01:16,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:01:16,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:01:16,432 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:01:16,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-02-18 16:01:16,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 16:01:16,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:01:16,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 16:01:16,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:01:16,599 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2023-02-18 16:01:16,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:01:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2023-02-18 16:01:16,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488837265] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:01:16,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:01:16,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 30 [2023-02-18 16:01:16,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454930342] [2023-02-18 16:01:16,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:01:16,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-18 16:01:16,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:01:16,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-18 16:01:16,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2023-02-18 16:01:16,602 INFO L87 Difference]: Start difference. First operand 899 states and 1202 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 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 16:01:23,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:01:23,615 INFO L93 Difference]: Finished difference Result 1571 states and 2079 transitions. [2023-02-18 16:01:23,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2023-02-18 16:01:23,615 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 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 44 [2023-02-18 16:01:23,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:01:23,618 INFO L225 Difference]: With dead ends: 1571 [2023-02-18 16:01:23,618 INFO L226 Difference]: Without dead ends: 1369 [2023-02-18 16:01:23,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9940 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1720, Invalid=27350, Unknown=0, NotChecked=0, Total=29070 [2023-02-18 16:01:23,620 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 203 mSDsluCounter, 1601 mSDsCounter, 0 mSdLazyCounter, 3936 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 1682 SdHoareTripleChecker+Invalid, 4226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 3936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-18 16:01:23,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 1682 Invalid, 4226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 3936 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-02-18 16:01:23,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2023-02-18 16:01:24,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 875. [2023-02-18 16:01:24,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 1.3306636155606408) internal successors, (1163), 874 states have internal predecessors, (1163), 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 16:01:24,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1163 transitions. [2023-02-18 16:01:24,219 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1163 transitions. Word has length 44 [2023-02-18 16:01:24,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:01:24,219 INFO L495 AbstractCegarLoop]: Abstraction has 875 states and 1163 transitions. [2023-02-18 16:01:24,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 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 16:01:24,219 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1163 transitions. [2023-02-18 16:01:24,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-18 16:01:24,220 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:01:24,220 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:01:24,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-02-18 16:01:24,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-02-18 16:01:24,425 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:01:24,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:01:24,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1993028319, now seen corresponding path program 12 times [2023-02-18 16:01:24,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:01:24,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618099235] [2023-02-18 16:01:24,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:01:24,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:01:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:01:24,774 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:01:24,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:01:24,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618099235] [2023-02-18 16:01:24,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618099235] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:01:24,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698649308] [2023-02-18 16:01:24,775 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:01:24,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:01:24,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:01:24,776 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:01:24,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-02-18 16:01:25,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-18 16:01:25,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:01:25,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-18 16:01:25,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:01:25,419 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-02-18 16:01:25,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:01:25,423 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-02-18 16:01:25,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698649308] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:01:25,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:01:25,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14, 14] total 39 [2023-02-18 16:01:25,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165082386] [2023-02-18 16:01:25,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:01:25,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-18 16:01:25,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:01:25,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-18 16:01:25,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 16:01:25,424 INFO L87 Difference]: Start difference. First operand 875 states and 1163 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 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 16:04:43,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 16:06:20,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:06:20,967 INFO L93 Difference]: Finished difference Result 1428 states and 1953 transitions. [2023-02-18 16:06:20,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2023-02-18 16:06:20,967 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 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 45 [2023-02-18 16:06:20,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:06:20,970 INFO L225 Difference]: With dead ends: 1428 [2023-02-18 16:06:20,971 INFO L226 Difference]: Without dead ends: 1314 [2023-02-18 16:06:20,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36782 ImplicationChecksByTransitivity, 271.2s TimeCoverageRelationStatistics Valid=5683, Invalid=90725, Unknown=2, NotChecked=0, Total=96410 [2023-02-18 16:06:20,979 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 701 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 8110 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 8608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 8110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:06:20,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 345 Invalid, 8608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 8110 Invalid, 0 Unknown, 0 Unchecked, 23.2s Time] [2023-02-18 16:06:20,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2023-02-18 16:06:21,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 872. [2023-02-18 16:06:21,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 1.328358208955224) internal successors, (1157), 871 states have internal predecessors, (1157), 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 16:06:21,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1157 transitions. [2023-02-18 16:06:21,622 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1157 transitions. Word has length 45 [2023-02-18 16:06:21,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:06:21,622 INFO L495 AbstractCegarLoop]: Abstraction has 872 states and 1157 transitions. [2023-02-18 16:06:21,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 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 16:06:21,622 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1157 transitions. [2023-02-18 16:06:21,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-18 16:06:21,623 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:06:21,623 INFO L195 NwaCegarLoop]: trace histogram [17, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:06:21,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-02-18 16:06:21,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-02-18 16:06:21,828 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:06:21,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:06:21,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1160492624, now seen corresponding path program 22 times [2023-02-18 16:06:21,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:06:21,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939075116] [2023-02-18 16:06:21,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:06:21,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:06:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:06:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-18 16:06:22,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:06:22,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939075116] [2023-02-18 16:06:22,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939075116] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:06:22,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763171914] [2023-02-18 16:06:22,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:06:22,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:06:22,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:06:22,132 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:06:22,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-02-18 16:06:22,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:06:22,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:06:22,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 93 conjunts are in the unsatisfiable core [2023-02-18 16:06:22,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:06:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:06:22,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:06:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-18 16:06:23,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763171914] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:06:23,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:06:23,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 37, 21] total 62 [2023-02-18 16:06:23,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634845096] [2023-02-18 16:06:23,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:06:23,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-18 16:06:23,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:06:23,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-18 16:06:23,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=578, Invalid=3204, Unknown=0, NotChecked=0, Total=3782 [2023-02-18 16:06:23,330 INFO L87 Difference]: Start difference. First operand 872 states and 1157 transitions. Second operand has 62 states, 62 states have (on average 1.3709677419354838) internal successors, (85), 62 states have internal predecessors, (85), 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 16:06:47,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:06:47,410 INFO L93 Difference]: Finished difference Result 1857 states and 2441 transitions. [2023-02-18 16:06:47,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 235 states. [2023-02-18 16:06:47,410 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.3709677419354838) internal successors, (85), 62 states have internal predecessors, (85), 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 45 [2023-02-18 16:06:47,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:06:47,414 INFO L225 Difference]: With dead ends: 1857 [2023-02-18 16:06:47,414 INFO L226 Difference]: Without dead ends: 1649 [2023-02-18 16:06:47,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 35 SyntacticMatches, 20 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25814 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=6257, Invalid=64233, Unknown=0, NotChecked=0, Total=70490 [2023-02-18 16:06:47,426 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 381 mSDsluCounter, 2322 mSDsCounter, 0 mSdLazyCounter, 7740 mSolverCounterSat, 1114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 2405 SdHoareTripleChecker+Invalid, 8854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1114 IncrementalHoareTripleChecker+Valid, 7740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:06:47,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 2405 Invalid, 8854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1114 Valid, 7740 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2023-02-18 16:06:47,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2023-02-18 16:06:48,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 829. [2023-02-18 16:06:48,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 1.3526570048309179) internal successors, (1120), 828 states have internal predecessors, (1120), 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 16:06:48,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1120 transitions. [2023-02-18 16:06:48,126 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1120 transitions. Word has length 45 [2023-02-18 16:06:48,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:06:48,127 INFO L495 AbstractCegarLoop]: Abstraction has 829 states and 1120 transitions. [2023-02-18 16:06:48,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.3709677419354838) internal successors, (85), 62 states have internal predecessors, (85), 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 16:06:48,127 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1120 transitions. [2023-02-18 16:06:48,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-18 16:06:48,128 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:06:48,128 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:06:48,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-02-18 16:06:48,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:06:48,333 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:06:48,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:06:48,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1457346689, now seen corresponding path program 23 times [2023-02-18 16:06:48,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:06:48,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268155136] [2023-02-18 16:06:48,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:06:48,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:06:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:06:48,688 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 29 proven. 62 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-18 16:06:48,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:06:48,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268155136] [2023-02-18 16:06:48,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268155136] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:06:48,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432436933] [2023-02-18 16:06:48,689 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:06:48,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:06:48,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:06:48,701 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:06:48,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-02-18 16:06:49,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-18 16:06:49,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:06:49,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-18 16:06:49,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:06:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-02-18 16:06:49,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:06:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-02-18 16:06:49,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432436933] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:06:49,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:06:49,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 26 [2023-02-18 16:06:49,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794997467] [2023-02-18 16:06:49,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:06:49,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 16:06:49,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:06:49,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 16:06:49,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2023-02-18 16:06:49,891 INFO L87 Difference]: Start difference. First operand 829 states and 1120 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 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 16:06:55,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:06:55,239 INFO L93 Difference]: Finished difference Result 1732 states and 2521 transitions. [2023-02-18 16:06:55,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-02-18 16:06:55,240 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 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 47 [2023-02-18 16:06:55,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:06:55,250 INFO L225 Difference]: With dead ends: 1732 [2023-02-18 16:06:55,250 INFO L226 Difference]: Without dead ends: 1636 [2023-02-18 16:06:55,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 75 SyntacticMatches, 17 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2728 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1679, Invalid=6331, Unknown=0, NotChecked=0, Total=8010 [2023-02-18 16:06:55,252 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 381 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:06:55,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 170 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-18 16:06:55,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2023-02-18 16:06:56,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1367. [2023-02-18 16:06:56,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 1.4399707174231333) internal successors, (1967), 1366 states have internal predecessors, (1967), 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 16:06:56,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 1967 transitions. [2023-02-18 16:06:56,331 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 1967 transitions. Word has length 47 [2023-02-18 16:06:56,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:06:56,331 INFO L495 AbstractCegarLoop]: Abstraction has 1367 states and 1967 transitions. [2023-02-18 16:06:56,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 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 16:06:56,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 1967 transitions. [2023-02-18 16:06:56,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-18 16:06:56,332 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:06:56,332 INFO L195 NwaCegarLoop]: trace histogram [18, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:06:56,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-02-18 16:06:56,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:06:56,537 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:06:56,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:06:56,538 INFO L85 PathProgramCache]: Analyzing trace with hash 690459936, now seen corresponding path program 24 times [2023-02-18 16:06:56,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:06:56,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493653794] [2023-02-18 16:06:56,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:06:56,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:06:56,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:06:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-02-18 16:06:56,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:06:56,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493653794] [2023-02-18 16:06:56,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493653794] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:06:56,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044697510] [2023-02-18 16:06:56,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:06:56,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:06:56,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:06:56,862 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:06:56,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-02-18 16:06:57,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-18 16:06:57,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:06:57,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 16:06:57,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:06:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-02-18 16:06:57,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:06:57,673 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-02-18 16:06:57,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044697510] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:06:57,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:06:57,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 13, 13] total 49 [2023-02-18 16:06:57,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500064520] [2023-02-18 16:06:57,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:06:57,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-18 16:06:57,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:06:57,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-18 16:06:57,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1931, Unknown=0, NotChecked=0, Total=2352 [2023-02-18 16:06:57,675 INFO L87 Difference]: Start difference. First operand 1367 states and 1967 transitions. Second operand has 49 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 49 states have internal predecessors, (64), 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 16:07:05,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:07:05,941 INFO L93 Difference]: Finished difference Result 2346 states and 3351 transitions. [2023-02-18 16:07:05,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2023-02-18 16:07:05,941 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 49 states have internal predecessors, (64), 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 47 [2023-02-18 16:07:05,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:07:05,948 INFO L225 Difference]: With dead ends: 2346 [2023-02-18 16:07:05,949 INFO L226 Difference]: Without dead ends: 1933 [2023-02-18 16:07:05,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7610 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4318, Invalid=21122, Unknown=0, NotChecked=0, Total=25440 [2023-02-18 16:07:05,950 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 713 mSDsluCounter, 2586 mSDsCounter, 0 mSdLazyCounter, 5627 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 2689 SdHoareTripleChecker+Invalid, 5821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 5627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-02-18 16:07:05,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [713 Valid, 2689 Invalid, 5821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 5627 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-02-18 16:07:05,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2023-02-18 16:07:06,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1364. [2023-02-18 16:07:06,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 1363 states have (on average 1.35509904622157) internal successors, (1847), 1363 states have internal predecessors, (1847), 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 16:07:06,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 1847 transitions. [2023-02-18 16:07:06,913 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 1847 transitions. Word has length 47 [2023-02-18 16:07:06,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:07:06,914 INFO L495 AbstractCegarLoop]: Abstraction has 1364 states and 1847 transitions. [2023-02-18 16:07:06,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 49 states have internal predecessors, (64), 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 16:07:06,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 1847 transitions. [2023-02-18 16:07:06,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-18 16:07:06,915 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:07:06,915 INFO L195 NwaCegarLoop]: trace histogram [19, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:07:06,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-02-18 16:07:07,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:07:07,119 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:07:07,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:07:07,120 INFO L85 PathProgramCache]: Analyzing trace with hash 2090599033, now seen corresponding path program 25 times [2023-02-18 16:07:07,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:07:07,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608627527] [2023-02-18 16:07:07,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:07:07,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:07:07,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:07:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 16:07:07,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:07:07,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608627527] [2023-02-18 16:07:07,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608627527] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:07:07,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723817554] [2023-02-18 16:07:07,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:07:07,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:07:07,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:07:07,492 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:07:07,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-02-18 16:07:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:07:07,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 101 conjunts are in the unsatisfiable core [2023-02-18 16:07:07,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:07:08,118 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:07:08,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:07:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-18 16:07:08,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723817554] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:07:08,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:07:08,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 40, 22] total 66 [2023-02-18 16:07:08,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090259987] [2023-02-18 16:07:08,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:07:08,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-02-18 16:07:08,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:07:08,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-02-18 16:07:08,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=3655, Unknown=0, NotChecked=0, Total=4290 [2023-02-18 16:07:08,736 INFO L87 Difference]: Start difference. First operand 1364 states and 1847 transitions. Second operand has 66 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 66 states have internal predecessors, (89), 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 16:07:32,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:07:32,652 INFO L93 Difference]: Finished difference Result 2860 states and 3918 transitions. [2023-02-18 16:07:32,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 240 states. [2023-02-18 16:07:32,652 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 66 states have internal predecessors, (89), 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 48 [2023-02-18 16:07:32,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:07:32,657 INFO L225 Difference]: With dead ends: 2860 [2023-02-18 16:07:32,657 INFO L226 Difference]: Without dead ends: 2423 [2023-02-18 16:07:32,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 37 SyntacticMatches, 22 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25986 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=5976, Invalid=66654, Unknown=0, NotChecked=0, Total=72630 [2023-02-18 16:07:32,660 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 325 mSDsluCounter, 2244 mSDsCounter, 0 mSdLazyCounter, 7479 mSolverCounterSat, 1158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 2333 SdHoareTripleChecker+Invalid, 8637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1158 IncrementalHoareTripleChecker+Valid, 7479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:07:32,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 2333 Invalid, 8637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1158 Valid, 7479 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2023-02-18 16:07:32,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2023-02-18 16:07:33,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 1212. [2023-02-18 16:07:33,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1211 states have (on average 1.4087530966143682) internal successors, (1706), 1211 states have internal predecessors, (1706), 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 16:07:33,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1706 transitions. [2023-02-18 16:07:33,689 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1706 transitions. Word has length 48 [2023-02-18 16:07:33,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:07:33,689 INFO L495 AbstractCegarLoop]: Abstraction has 1212 states and 1706 transitions. [2023-02-18 16:07:33,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 66 states have internal predecessors, (89), 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 16:07:33,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1706 transitions. [2023-02-18 16:07:33,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-18 16:07:33,700 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:07:33,700 INFO L195 NwaCegarLoop]: trace histogram [20, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:07:33,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-02-18 16:07:33,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-02-18 16:07:33,904 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:07:33,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:07:33,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1880232619, now seen corresponding path program 26 times [2023-02-18 16:07:33,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:07:33,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271635106] [2023-02-18 16:07:33,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:07:33,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:07:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:07:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-18 16:07:34,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:07:34,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271635106] [2023-02-18 16:07:34,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271635106] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:07:34,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754713375] [2023-02-18 16:07:34,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:07:34,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:07:34,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:07:34,297 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:07:34,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-02-18 16:07:34,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:07:34,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:07:34,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 107 conjunts are in the unsatisfiable core [2023-02-18 16:07:34,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:07:35,098 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:07:35,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:07:35,878 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-02-18 16:07:35,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754713375] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:07:35,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:07:35,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 42, 23] total 69 [2023-02-18 16:07:35,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752108287] [2023-02-18 16:07:35,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:07:35,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-02-18 16:07:35,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:07:35,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-02-18 16:07:35,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=692, Invalid=4000, Unknown=0, NotChecked=0, Total=4692 [2023-02-18 16:07:35,880 INFO L87 Difference]: Start difference. First operand 1212 states and 1706 transitions. Second operand has 69 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 69 states have internal predecessors, (92), 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 16:08:01,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:08:01,884 INFO L93 Difference]: Finished difference Result 2815 states and 3881 transitions. [2023-02-18 16:08:01,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 250 states. [2023-02-18 16:08:01,885 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 69 states have internal predecessors, (92), 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 50 [2023-02-18 16:08:01,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:08:01,888 INFO L225 Difference]: With dead ends: 2815 [2023-02-18 16:08:01,888 INFO L226 Difference]: Without dead ends: 2381 [2023-02-18 16:08:01,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 38 SyntacticMatches, 23 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27665 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=6356, Invalid=71206, Unknown=0, NotChecked=0, Total=77562 [2023-02-18 16:08:01,891 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 378 mSDsluCounter, 2803 mSDsCounter, 0 mSdLazyCounter, 7835 mSolverCounterSat, 1438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 2897 SdHoareTripleChecker+Invalid, 9273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1438 IncrementalHoareTripleChecker+Valid, 7835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:08:01,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 2897 Invalid, 9273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1438 Valid, 7835 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2023-02-18 16:08:01,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2023-02-18 16:08:03,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 1255. [2023-02-18 16:08:03,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1254 states have (on average 1.4066985645933014) internal successors, (1764), 1254 states have internal predecessors, (1764), 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 16:08:03,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1764 transitions. [2023-02-18 16:08:03,022 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1764 transitions. Word has length 50 [2023-02-18 16:08:03,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:08:03,022 INFO L495 AbstractCegarLoop]: Abstraction has 1255 states and 1764 transitions. [2023-02-18 16:08:03,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 69 states have internal predecessors, (92), 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 16:08:03,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1764 transitions. [2023-02-18 16:08:03,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 16:08:03,040 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:08:03,041 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:08:03,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-02-18 16:08:03,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-02-18 16:08:03,248 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:08:03,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:08:03,248 INFO L85 PathProgramCache]: Analyzing trace with hash 711454816, now seen corresponding path program 11 times [2023-02-18 16:08:03,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:08:03,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472698002] [2023-02-18 16:08:03,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:08:03,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:08:03,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:08:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-02-18 16:08:03,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:08:03,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472698002] [2023-02-18 16:08:03,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472698002] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:08:03,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096116590] [2023-02-18 16:08:03,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:08:03,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:08:03,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:08:03,525 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:08:03,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-02-18 16:08:15,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-02-18 16:08:15,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:08:15,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-18 16:08:15,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:08:15,816 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-02-18 16:08:15,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:08:16,213 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 36 proven. 72 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-18 16:08:16,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096116590] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:08:16,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:08:16,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 20] total 51 [2023-02-18 16:08:16,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303747919] [2023-02-18 16:08:16,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:08:16,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-18 16:08:16,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:08:16,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-18 16:08:16,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=2242, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 16:08:16,215 INFO L87 Difference]: Start difference. First operand 1255 states and 1764 transitions. Second operand has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 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 16:08:43,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:08:43,413 INFO L93 Difference]: Finished difference Result 1830 states and 2446 transitions. [2023-02-18 16:08:43,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2023-02-18 16:08:43,414 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 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 51 [2023-02-18 16:08:43,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:08:43,416 INFO L225 Difference]: With dead ends: 1830 [2023-02-18 16:08:43,417 INFO L226 Difference]: Without dead ends: 1614 [2023-02-18 16:08:43,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 63 SyntacticMatches, 13 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3634 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=1325, Invalid=13681, Unknown=0, NotChecked=0, Total=15006 [2023-02-18 16:08:43,424 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 336 mSDsluCounter, 1542 mSDsCounter, 0 mSdLazyCounter, 2955 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 1619 SdHoareTripleChecker+Invalid, 3206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 2955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2023-02-18 16:08:43,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 1619 Invalid, 3206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 2955 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2023-02-18 16:08:43,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2023-02-18 16:08:44,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1206. [2023-02-18 16:08:44,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 1.4107883817427387) internal successors, (1700), 1205 states have internal predecessors, (1700), 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 16:08:44,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 1700 transitions. [2023-02-18 16:08:44,490 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 1700 transitions. Word has length 51 [2023-02-18 16:08:44,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:08:44,490 INFO L495 AbstractCegarLoop]: Abstraction has 1206 states and 1700 transitions. [2023-02-18 16:08:44,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 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 16:08:44,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 1700 transitions. [2023-02-18 16:08:44,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-18 16:08:44,492 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:08:44,492 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:08:44,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-02-18 16:08:44,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-02-18 16:08:44,696 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:08:44,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:08:44,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1816438874, now seen corresponding path program 27 times [2023-02-18 16:08:44,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:08:44,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440170369] [2023-02-18 16:08:44,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:08:44,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:08:44,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:08:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 37 proven. 79 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-02-18 16:08:45,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:08:45,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440170369] [2023-02-18 16:08:45,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440170369] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:08:45,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593734557] [2023-02-18 16:08:45,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:08:45,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:08:45,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:08:45,049 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:08:45,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-02-18 16:08:45,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-18 16:08:45,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:08:45,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 16:08:45,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:08:45,682 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-02-18 16:08:45,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:08:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-02-18 16:08:45,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593734557] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:08:45,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:08:45,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 12] total 29 [2023-02-18 16:08:45,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366156051] [2023-02-18 16:08:45,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:08:45,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 16:08:45,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:08:45,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 16:08:45,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2023-02-18 16:08:45,819 INFO L87 Difference]: Start difference. First operand 1206 states and 1700 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 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 16:08:54,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:08:54,469 INFO L93 Difference]: Finished difference Result 1814 states and 2528 transitions. [2023-02-18 16:08:54,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-02-18 16:08:54,470 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 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 52 [2023-02-18 16:08:54,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:08:54,472 INFO L225 Difference]: With dead ends: 1814 [2023-02-18 16:08:54,473 INFO L226 Difference]: Without dead ends: 1711 [2023-02-18 16:08:54,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 84 SyntacticMatches, 18 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4272 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2443, Invalid=9547, Unknown=0, NotChecked=0, Total=11990 [2023-02-18 16:08:54,474 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 464 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-02-18 16:08:54,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 273 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-02-18 16:08:54,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2023-02-18 16:08:55,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1355. [2023-02-18 16:08:55,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 1.4224519940915805) internal successors, (1926), 1354 states have internal predecessors, (1926), 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 16:08:55,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 1926 transitions. [2023-02-18 16:08:55,693 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 1926 transitions. Word has length 52 [2023-02-18 16:08:55,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:08:55,693 INFO L495 AbstractCegarLoop]: Abstraction has 1355 states and 1926 transitions. [2023-02-18 16:08:55,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 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 16:08:55,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 1926 transitions. [2023-02-18 16:08:55,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-18 16:08:55,695 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:08:55,695 INFO L195 NwaCegarLoop]: trace histogram [21, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:08:55,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-02-18 16:08:55,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-02-18 16:08:55,900 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:08:55,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:08:55,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1080359909, now seen corresponding path program 12 times [2023-02-18 16:08:55,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:08:55,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093596038] [2023-02-18 16:08:55,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:08:55,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:08:55,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:08:56,305 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-02-18 16:08:56,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:08:56,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093596038] [2023-02-18 16:08:56,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093596038] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:08:56,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226949091] [2023-02-18 16:08:56,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:08:56,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:08:56,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:08:56,306 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:08:56,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-02-18 16:08:57,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-02-18 16:08:57,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:08:57,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 16:08:57,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:08:57,989 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-02-18 16:08:57,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:08:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-02-18 16:08:58,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226949091] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:08:58,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:08:58,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 19, 19] total 64 [2023-02-18 16:08:58,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146836214] [2023-02-18 16:08:58,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:08:58,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-18 16:08:58,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:08:58,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-18 16:08:58,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=751, Invalid=3281, Unknown=0, NotChecked=0, Total=4032 [2023-02-18 16:08:58,791 INFO L87 Difference]: Start difference. First operand 1355 states and 1926 transitions. Second operand has 64 states, 64 states have (on average 1.21875) internal successors, (78), 64 states have internal predecessors, (78), 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 16:11:10,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:11:10,781 INFO L93 Difference]: Finished difference Result 4047 states and 5549 transitions. [2023-02-18 16:11:10,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 381 states. [2023-02-18 16:11:10,781 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.21875) internal successors, (78), 64 states have internal predecessors, (78), 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 52 [2023-02-18 16:11:10,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:11:10,786 INFO L225 Difference]: With dead ends: 4047 [2023-02-18 16:11:10,786 INFO L226 Difference]: Without dead ends: 3530 [2023-02-18 16:11:10,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 396 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73742 ImplicationChecksByTransitivity, 123.9s TimeCoverageRelationStatistics Valid=33629, Invalid=124377, Unknown=0, NotChecked=0, Total=158006 [2023-02-18 16:11:10,792 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 3719 mSDsluCounter, 4372 mSDsCounter, 0 mSdLazyCounter, 8513 mSolverCounterSat, 1337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3719 SdHoareTripleChecker+Valid, 4503 SdHoareTripleChecker+Invalid, 9850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1337 IncrementalHoareTripleChecker+Valid, 8513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-02-18 16:11:10,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3719 Valid, 4503 Invalid, 9850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1337 Valid, 8513 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-02-18 16:11:10,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3530 states. [2023-02-18 16:11:12,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3530 to 2081. [2023-02-18 16:11:12,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 2080 states have (on average 1.33125) internal successors, (2769), 2080 states have internal predecessors, (2769), 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 16:11:12,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 2769 transitions. [2023-02-18 16:11:12,241 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 2769 transitions. Word has length 52 [2023-02-18 16:11:12,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:11:12,241 INFO L495 AbstractCegarLoop]: Abstraction has 2081 states and 2769 transitions. [2023-02-18 16:11:12,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.21875) internal successors, (78), 64 states have internal predecessors, (78), 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 16:11:12,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 2769 transitions. [2023-02-18 16:11:12,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-18 16:11:12,243 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:11:12,243 INFO L195 NwaCegarLoop]: trace histogram [18, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:11:12,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-02-18 16:11:12,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-02-18 16:11:12,448 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:11:12,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:11:12,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1684495895, now seen corresponding path program 13 times [2023-02-18 16:11:12,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:11:12,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376797356] [2023-02-18 16:11:12,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:11:12,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:11:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:11:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 78 proven. 156 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-02-18 16:11:12,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:11:12,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376797356] [2023-02-18 16:11:12,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376797356] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:11:12,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085042091] [2023-02-18 16:11:12,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:11:12,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:11:12,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:11:12,828 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:11:12,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-02-18 16:11:12,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:11:12,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-18 16:11:12,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:11:13,252 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 78 proven. 156 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-02-18 16:11:13,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:11:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 78 proven. 156 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-02-18 16:11:14,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085042091] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:11:14,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:11:14,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 67 [2023-02-18 16:11:14,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194419371] [2023-02-18 16:11:14,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:11:14,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-02-18 16:11:14,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:11:14,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-02-18 16:11:14,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=3758, Unknown=0, NotChecked=0, Total=4422 [2023-02-18 16:11:14,112 INFO L87 Difference]: Start difference. First operand 2081 states and 2769 transitions. Second operand has 67 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 67 states have internal predecessors, (85), 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)