./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/gcd02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 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/recursive/gcd02.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 5840bf8cb045a250261e3957017079dce43a53700f7c91e31c16b36d5b980e00 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 21:36:17,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 21:36:17,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 21:36:17,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 21:36:17,218 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 21:36:17,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 21:36:17,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 21:36:17,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 21:36:17,222 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 21:36:17,223 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 21:36:17,223 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 21:36:17,224 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 21:36:17,224 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 21:36:17,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 21:36:17,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 21:36:17,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 21:36:17,227 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 21:36:17,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 21:36:17,236 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 21:36:17,237 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 21:36:17,239 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 21:36:17,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 21:36:17,241 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 21:36:17,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 21:36:17,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 21:36:17,243 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 21:36:17,244 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 21:36:17,244 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 21:36:17,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 21:36:17,245 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 21:36:17,245 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 21:36:17,246 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 21:36:17,246 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 21:36:17,247 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 21:36:17,248 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 21:36:17,248 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 21:36:17,248 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 21:36:17,248 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 21:36:17,249 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 21:36:17,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 21:36:17,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 21:36:17,250 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 21:36:17,264 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 21:36:17,264 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 21:36:17,264 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 21:36:17,265 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 21:36:17,265 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 21:36:17,265 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 21:36:17,266 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 21:36:17,266 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 21:36:17,266 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 21:36:17,266 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 21:36:17,266 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 21:36:17,266 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 21:36:17,267 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 21:36:17,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 21:36:17,267 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 21:36:17,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 21:36:17,267 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 21:36:17,267 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 21:36:17,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 21:36:17,268 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 21:36:17,268 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 21:36:17,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 21:36:17,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 21:36:17,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 21:36:17,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 21:36:17,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 21:36:17,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 21:36:17,269 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 21:36:17,269 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 21:36:17,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 21:36:17,269 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 21:36:17,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 21:36:17,269 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 21:36:17,270 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 21:36:17,270 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 21:36:17,270 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5840bf8cb045a250261e3957017079dce43a53700f7c91e31c16b36d5b980e00 [2023-02-15 21:36:17,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 21:36:17,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 21:36:17,518 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 21:36:17,519 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 21:36:17,520 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 21:36:17,521 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/gcd02.c [2023-02-15 21:36:18,706 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 21:36:18,866 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 21:36:18,866 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/gcd02.c [2023-02-15 21:36:18,870 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3a86c300/3b9059cbf44045c0a991bbb7532ec95f/FLAGbcdcf175a [2023-02-15 21:36:18,882 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3a86c300/3b9059cbf44045c0a991bbb7532ec95f [2023-02-15 21:36:18,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 21:36:18,885 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 21:36:18,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 21:36:18,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 21:36:18,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 21:36:18,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:36:18" (1/1) ... [2023-02-15 21:36:18,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60c9dc8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:36:18, skipping insertion in model container [2023-02-15 21:36:18,894 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:36:18" (1/1) ... [2023-02-15 21:36:18,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 21:36:18,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 21:36:19,023 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/recursive/gcd02.c[623,636] [2023-02-15 21:36:19,032 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/recursive/gcd02.c[1283,1296] [2023-02-15 21:36:19,033 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 21:36:19,039 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 21:36:19,048 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/recursive/gcd02.c[623,636] [2023-02-15 21:36:19,051 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/recursive/gcd02.c[1283,1296] [2023-02-15 21:36:19,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 21:36:19,061 INFO L208 MainTranslator]: Completed translation [2023-02-15 21:36:19,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:36:19 WrapperNode [2023-02-15 21:36:19,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 21:36:19,063 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 21:36:19,063 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 21:36:19,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 21:36:19,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:36:19" (1/1) ... [2023-02-15 21:36:19,076 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:36:19" (1/1) ... [2023-02-15 21:36:19,090 INFO L138 Inliner]: procedures = 14, calls = 20, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 45 [2023-02-15 21:36:19,090 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 21:36:19,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 21:36:19,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 21:36:19,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 21:36:19,098 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:36:19" (1/1) ... [2023-02-15 21:36:19,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:36:19" (1/1) ... [2023-02-15 21:36:19,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:36:19" (1/1) ... [2023-02-15 21:36:19,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:36:19" (1/1) ... [2023-02-15 21:36:19,102 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:36:19" (1/1) ... [2023-02-15 21:36:19,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:36:19" (1/1) ... [2023-02-15 21:36:19,104 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:36:19" (1/1) ... [2023-02-15 21:36:19,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:36:19" (1/1) ... [2023-02-15 21:36:19,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 21:36:19,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 21:36:19,106 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 21:36:19,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 21:36:19,107 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:36:19" (1/1) ... [2023-02-15 21:36:19,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 21:36:19,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:19,133 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 21:36:19,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 21:36:19,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 21:36:19,188 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2023-02-15 21:36:19,188 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2023-02-15 21:36:19,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 21:36:19,188 INFO L130 BoogieDeclarations]: Found specification of procedure divides [2023-02-15 21:36:19,188 INFO L138 BoogieDeclarations]: Found implementation of procedure divides [2023-02-15 21:36:19,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 21:36:19,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 21:36:19,245 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 21:36:19,256 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 21:36:19,452 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 21:36:19,456 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 21:36:19,478 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-15 21:36:19,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:36:19 BoogieIcfgContainer [2023-02-15 21:36:19,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 21:36:19,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 21:36:19,491 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 21:36:19,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 21:36:19,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 09:36:18" (1/3) ... [2023-02-15 21:36:19,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4903ca49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:36:19, skipping insertion in model container [2023-02-15 21:36:19,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:36:19" (2/3) ... [2023-02-15 21:36:19,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4903ca49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:36:19, skipping insertion in model container [2023-02-15 21:36:19,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:36:19" (3/3) ... [2023-02-15 21:36:19,498 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd02.c [2023-02-15 21:36:19,515 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 21:36:19,516 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-02-15 21:36:19,573 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 21:36:19,579 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;@13d426b2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 21:36:19,580 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-02-15 21:36:19,584 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 26 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 21:36:19,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-15 21:36:19,590 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:19,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:19,591 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:19,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:19,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1041004109, now seen corresponding path program 1 times [2023-02-15 21:36:19,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:19,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315156949] [2023-02-15 21:36:19,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:19,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:19,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:19,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:36:19,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:19,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315156949] [2023-02-15 21:36:19,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315156949] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:36:19,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:36:19,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 21:36:19,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112690679] [2023-02-15 21:36:19,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:36:19,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 21:36:19,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:19,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 21:36:19,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:36:19,867 INFO L87 Difference]: Start difference. First operand has 34 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 26 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:36:20,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:20,027 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2023-02-15 21:36:20,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 21:36:20,037 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-15 21:36:20,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:20,044 INFO L225 Difference]: With dead ends: 78 [2023-02-15 21:36:20,046 INFO L226 Difference]: Without dead ends: 41 [2023-02-15 21:36:20,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-15 21:36:20,053 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 34 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:20,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 133 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:36:20,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-15 21:36:20,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-02-15 21:36:20,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:36:20,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2023-02-15 21:36:20,097 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 9 [2023-02-15 21:36:20,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:20,097 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2023-02-15 21:36:20,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:36:20,098 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2023-02-15 21:36:20,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-15 21:36:20,099 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:20,099 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:20,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 21:36:20,100 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:20,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:20,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1602001293, now seen corresponding path program 1 times [2023-02-15 21:36:20,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:20,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53551044] [2023-02-15 21:36:20,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:20,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:20,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:20,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:36:20,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:20,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53551044] [2023-02-15 21:36:20,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53551044] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:36:20,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:36:20,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 21:36:20,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984285273] [2023-02-15 21:36:20,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:36:20,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 21:36:20,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:20,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 21:36:20,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:36:20,305 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:36:20,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:20,404 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2023-02-15 21:36:20,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 21:36:20,405 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-15 21:36:20,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:20,409 INFO L225 Difference]: With dead ends: 59 [2023-02-15 21:36:20,409 INFO L226 Difference]: Without dead ends: 57 [2023-02-15 21:36:20,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-02-15 21:36:20,411 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 17 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:20,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 120 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:36:20,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-15 21:36:20,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2023-02-15 21:36:20,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 21:36:20,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2023-02-15 21:36:20,434 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 14 [2023-02-15 21:36:20,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:20,435 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2023-02-15 21:36:20,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:36:20,436 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2023-02-15 21:36:20,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-15 21:36:20,436 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:20,437 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:20,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 21:36:20,441 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:20,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:20,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1599171148, now seen corresponding path program 1 times [2023-02-15 21:36:20,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:20,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418881339] [2023-02-15 21:36:20,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:20,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:20,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:36:20,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:20,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418881339] [2023-02-15 21:36:20,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418881339] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:36:20,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:36:20,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 21:36:20,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986000995] [2023-02-15 21:36:20,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:36:20,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 21:36:20,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:20,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 21:36:20,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-02-15 21:36:20,588 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:36:20,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:20,706 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2023-02-15 21:36:20,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 21:36:20,707 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-15 21:36:20,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:20,709 INFO L225 Difference]: With dead ends: 63 [2023-02-15 21:36:20,709 INFO L226 Difference]: Without dead ends: 61 [2023-02-15 21:36:20,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-02-15 21:36:20,711 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 21 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:20,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 147 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:36:20,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-02-15 21:36:20,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2023-02-15 21:36:20,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 21:36:20,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2023-02-15 21:36:20,722 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 14 [2023-02-15 21:36:20,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:20,723 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2023-02-15 21:36:20,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:36:20,724 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2023-02-15 21:36:20,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 21:36:20,725 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:20,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:20,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 21:36:20,725 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:20,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:20,726 INFO L85 PathProgramCache]: Analyzing trace with hash -2110562560, now seen corresponding path program 1 times [2023-02-15 21:36:20,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:20,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048525293] [2023-02-15 21:36:20,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:20,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:20,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:36:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:20,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:36:20,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:36:20,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:20,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048525293] [2023-02-15 21:36:20,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048525293] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:36:20,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:36:20,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 21:36:20,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888399945] [2023-02-15 21:36:20,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:36:20,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 21:36:20,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:20,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 21:36:20,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:36:20,849 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 21:36:20,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:20,866 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2023-02-15 21:36:20,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 21:36:20,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-02-15 21:36:20,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:20,869 INFO L225 Difference]: With dead ends: 55 [2023-02-15 21:36:20,869 INFO L226 Difference]: Without dead ends: 51 [2023-02-15 21:36:20,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:36:20,874 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:20,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 95 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:36:20,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-15 21:36:20,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-02-15 21:36:20,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 37 states have internal predecessors, (44), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-02-15 21:36:20,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2023-02-15 21:36:20,890 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 20 [2023-02-15 21:36:20,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:20,890 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2023-02-15 21:36:20,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 21:36:20,891 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2023-02-15 21:36:20,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 21:36:20,894 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:20,894 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:20,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 21:36:20,894 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:20,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:20,895 INFO L85 PathProgramCache]: Analyzing trace with hash -291106652, now seen corresponding path program 1 times [2023-02-15 21:36:20,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:20,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811467413] [2023-02-15 21:36:20,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:20,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:20,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:36:20,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:21,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:36:21,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:21,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:36:21,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:21,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811467413] [2023-02-15 21:36:21,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811467413] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:36:21,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:36:21,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 21:36:21,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743987565] [2023-02-15 21:36:21,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:36:21,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 21:36:21,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:21,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 21:36:21,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-15 21:36:21,068 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 21:36:21,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:21,219 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2023-02-15 21:36:21,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 21:36:21,219 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-02-15 21:36:21,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:21,220 INFO L225 Difference]: With dead ends: 69 [2023-02-15 21:36:21,220 INFO L226 Difference]: Without dead ends: 65 [2023-02-15 21:36:21,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-15 21:36:21,233 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:21,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 100 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:36:21,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-15 21:36:21,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2023-02-15 21:36:21,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.205128205128205) internal successors, (47), 42 states have internal predecessors, (47), 10 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2023-02-15 21:36:21,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2023-02-15 21:36:21,250 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 21 [2023-02-15 21:36:21,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:21,250 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2023-02-15 21:36:21,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 21:36:21,251 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2023-02-15 21:36:21,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 21:36:21,253 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:21,253 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:21,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 21:36:21,254 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:21,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:21,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1709846180, now seen corresponding path program 1 times [2023-02-15 21:36:21,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:21,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417068070] [2023-02-15 21:36:21,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:21,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:21,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:36:21,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:21,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:36:21,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:21,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:21,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 21:36:21,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:21,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417068070] [2023-02-15 21:36:21,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417068070] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:36:21,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:36:21,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 21:36:21,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603077953] [2023-02-15 21:36:21,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:36:21,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 21:36:21,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:21,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 21:36:21,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:36:21,351 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 21:36:21,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:21,367 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2023-02-15 21:36:21,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 21:36:21,368 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2023-02-15 21:36:21,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:21,368 INFO L225 Difference]: With dead ends: 64 [2023-02-15 21:36:21,368 INFO L226 Difference]: Without dead ends: 55 [2023-02-15 21:36:21,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:36:21,369 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:21,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 126 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:36:21,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-15 21:36:21,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-02-15 21:36:21,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 10 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2023-02-15 21:36:21,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2023-02-15 21:36:21,374 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 27 [2023-02-15 21:36:21,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:21,374 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2023-02-15 21:36:21,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 21:36:21,374 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2023-02-15 21:36:21,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 21:36:21,374 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:21,374 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:21,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-15 21:36:21,375 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:21,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:21,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1148028586, now seen corresponding path program 1 times [2023-02-15 21:36:21,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:21,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349209617] [2023-02-15 21:36:21,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:21,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:21,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:36:21,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:21,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 21:36:21,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:21,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:21,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 21:36:21,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:21,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349209617] [2023-02-15 21:36:21,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349209617] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:21,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248778558] [2023-02-15 21:36:21,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:21,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:21,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:21,544 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:36:21,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 21:36:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:21,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 21:36:21,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:21,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 21:36:21,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:21,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 21:36:21,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248778558] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:21,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:21,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 15 [2023-02-15 21:36:21,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765615224] [2023-02-15 21:36:21,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:21,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 21:36:21,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:21,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 21:36:21,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-02-15 21:36:21,988 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 14 states have internal predecessors, (32), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 21:36:22,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:22,208 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2023-02-15 21:36:22,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 21:36:22,210 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 14 states have internal predecessors, (32), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2023-02-15 21:36:22,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:22,214 INFO L225 Difference]: With dead ends: 63 [2023-02-15 21:36:22,214 INFO L226 Difference]: Without dead ends: 55 [2023-02-15 21:36:22,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2023-02-15 21:36:22,215 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 19 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:22,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 152 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:36:22,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-15 21:36:22,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2023-02-15 21:36:22,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 21:36:22,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2023-02-15 21:36:22,225 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 28 [2023-02-15 21:36:22,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:22,225 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2023-02-15 21:36:22,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 14 states have internal predecessors, (32), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 21:36:22,226 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2023-02-15 21:36:22,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 21:36:22,226 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:22,227 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:22,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 21:36:22,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:22,432 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:22,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:22,433 INFO L85 PathProgramCache]: Analyzing trace with hash -729806600, now seen corresponding path program 1 times [2023-02-15 21:36:22,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:22,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267420308] [2023-02-15 21:36:22,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:22,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:22,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:22,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:36:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:22,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:22,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 21:36:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:22,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 21:36:22,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:22,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267420308] [2023-02-15 21:36:22,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267420308] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:22,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886152791] [2023-02-15 21:36:22,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:22,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:22,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:22,613 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:36:22,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 21:36:22,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:22,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 21:36:22,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:22,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 21:36:22,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:23,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 21:36:23,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886152791] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:23,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:23,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2023-02-15 21:36:23,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593999930] [2023-02-15 21:36:23,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:23,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 21:36:23,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:23,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 21:36:23,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2023-02-15 21:36:23,024 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-15 21:36:23,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:23,195 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2023-02-15 21:36:23,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 21:36:23,195 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 29 [2023-02-15 21:36:23,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:23,196 INFO L225 Difference]: With dead ends: 74 [2023-02-15 21:36:23,196 INFO L226 Difference]: Without dead ends: 70 [2023-02-15 21:36:23,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2023-02-15 21:36:23,197 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:23,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 202 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:36:23,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-02-15 21:36:23,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2023-02-15 21:36:23,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.146341463414634) internal successors, (47), 42 states have internal predecessors, (47), 10 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2023-02-15 21:36:23,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2023-02-15 21:36:23,203 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 29 [2023-02-15 21:36:23,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:23,203 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2023-02-15 21:36:23,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-15 21:36:23,203 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2023-02-15 21:36:23,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 21:36:23,204 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:23,204 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:23,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 21:36:23,414 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,SelfDestructingSolverStorable7 [2023-02-15 21:36:23,414 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:23,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:23,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1241581992, now seen corresponding path program 1 times [2023-02-15 21:36:23,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:23,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771660946] [2023-02-15 21:36:23,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:23,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:23,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:23,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:36:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:23,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:23,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 21:36:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 21:36:23,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:23,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771660946] [2023-02-15 21:36:23,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771660946] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:36:23,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:36:23,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 21:36:23,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409554356] [2023-02-15 21:36:23,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:36:23,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 21:36:23,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:23,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 21:36:23,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-15 21:36:23,526 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 21:36:23,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:23,626 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2023-02-15 21:36:23,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 21:36:23,627 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2023-02-15 21:36:23,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:23,628 INFO L225 Difference]: With dead ends: 80 [2023-02-15 21:36:23,628 INFO L226 Difference]: Without dead ends: 76 [2023-02-15 21:36:23,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-15 21:36:23,629 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 15 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:23,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 113 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:36:23,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-15 21:36:23,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2023-02-15 21:36:23,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 10 states have call successors, (10), 4 states have call predecessors, (10), 8 states have return successors, (19), 14 states have call predecessors, (19), 10 states have call successors, (19) [2023-02-15 21:36:23,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 79 transitions. [2023-02-15 21:36:23,634 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 79 transitions. Word has length 29 [2023-02-15 21:36:23,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:23,634 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 79 transitions. [2023-02-15 21:36:23,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 21:36:23,635 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 79 transitions. [2023-02-15 21:36:23,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 21:36:23,635 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:23,635 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:23,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-15 21:36:23,636 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:23,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:23,636 INFO L85 PathProgramCache]: Analyzing trace with hash 2029271682, now seen corresponding path program 1 times [2023-02-15 21:36:23,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:23,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694985298] [2023-02-15 21:36:23,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:23,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:23,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:36:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:23,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:23,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:23,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 21:36:23,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:23,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:23,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:23,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 21:36:23,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:23,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694985298] [2023-02-15 21:36:23,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694985298] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:23,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931615416] [2023-02-15 21:36:23,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:23,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:23,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:23,827 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:36:23,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 21:36:23,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:23,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-15 21:36:23,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:23,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 21:36:23,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:24,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 21:36:24,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931615416] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:24,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:24,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 20 [2023-02-15 21:36:24,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411259607] [2023-02-15 21:36:24,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:24,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 21:36:24,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:24,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 21:36:24,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2023-02-15 21:36:24,368 INFO L87 Difference]: Start difference. First operand 63 states and 79 transitions. Second operand has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 21:36:24,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:24,565 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2023-02-15 21:36:24,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 21:36:24,566 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) Word has length 36 [2023-02-15 21:36:24,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:24,567 INFO L225 Difference]: With dead ends: 89 [2023-02-15 21:36:24,567 INFO L226 Difference]: Without dead ends: 85 [2023-02-15 21:36:24,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 61 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2023-02-15 21:36:24,568 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 61 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:24,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 201 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:36:24,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-02-15 21:36:24,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2023-02-15 21:36:24,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 50 states have (on average 1.12) internal successors, (56), 51 states have internal predecessors, (56), 11 states have call successors, (11), 4 states have call predecessors, (11), 11 states have return successors, (27), 17 states have call predecessors, (27), 11 states have call successors, (27) [2023-02-15 21:36:24,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2023-02-15 21:36:24,580 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 36 [2023-02-15 21:36:24,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:24,580 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2023-02-15 21:36:24,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 21:36:24,581 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2023-02-15 21:36:24,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 21:36:24,583 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:24,583 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:24,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 21:36:24,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:24,788 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:24,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:24,789 INFO L85 PathProgramCache]: Analyzing trace with hash -122584798, now seen corresponding path program 1 times [2023-02-15 21:36:24,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:24,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301903510] [2023-02-15 21:36:24,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:24,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:24,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:36:24,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:24,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:24,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:24,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 21:36:24,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:24,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:25,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 21:36:25,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:25,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301903510] [2023-02-15 21:36:25,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301903510] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:25,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141409074] [2023-02-15 21:36:25,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:25,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:25,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:25,066 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:36:25,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 21:36:25,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:25,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-15 21:36:25,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:25,191 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 21:36:25,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:25,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 21:36:25,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141409074] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:25,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:25,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 16 [2023-02-15 21:36:25,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146969607] [2023-02-15 21:36:25,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:25,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 21:36:25,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:25,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 21:36:25,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-02-15 21:36:25,431 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand has 16 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-15 21:36:25,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:25,601 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2023-02-15 21:36:25,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 21:36:25,602 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 36 [2023-02-15 21:36:25,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:25,603 INFO L225 Difference]: With dead ends: 84 [2023-02-15 21:36:25,603 INFO L226 Difference]: Without dead ends: 75 [2023-02-15 21:36:25,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 65 SyntacticMatches, 10 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2023-02-15 21:36:25,604 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:25,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 145 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:36:25,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-15 21:36:25,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2023-02-15 21:36:25,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 51 states have internal predecessors, (55), 11 states have call successors, (11), 4 states have call predecessors, (11), 11 states have return successors, (26), 16 states have call predecessors, (26), 11 states have call successors, (26) [2023-02-15 21:36:25,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2023-02-15 21:36:25,609 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 36 [2023-02-15 21:36:25,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:25,609 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2023-02-15 21:36:25,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-15 21:36:25,610 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2023-02-15 21:36:25,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 21:36:25,610 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:25,610 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:25,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 21:36:25,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:25,811 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:25,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:25,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1326914756, now seen corresponding path program 1 times [2023-02-15 21:36:25,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:25,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502291586] [2023-02-15 21:36:25,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:25,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:25,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:36:25,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:25,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:25,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:25,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:25,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 21:36:25,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 21:36:25,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:25,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502291586] [2023-02-15 21:36:25,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502291586] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:25,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023052873] [2023-02-15 21:36:25,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:25,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:25,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:25,999 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:36:26,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 21:36:26,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:26,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-15 21:36:26,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:26,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 21:36:26,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:27,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 21:36:27,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023052873] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:27,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:27,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 34 [2023-02-15 21:36:27,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831703404] [2023-02-15 21:36:27,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:27,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 21:36:27,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:27,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 21:36:27,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1023, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 21:36:27,008 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand has 34 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2023-02-15 21:36:27,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:27,593 INFO L93 Difference]: Finished difference Result 121 states and 159 transitions. [2023-02-15 21:36:27,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 21:36:27,593 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 37 [2023-02-15 21:36:27,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:27,594 INFO L225 Difference]: With dead ends: 121 [2023-02-15 21:36:27,594 INFO L226 Difference]: Without dead ends: 117 [2023-02-15 21:36:27,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=265, Invalid=1805, Unknown=0, NotChecked=0, Total=2070 [2023-02-15 21:36:27,595 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 71 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:27,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 390 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:36:27,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-02-15 21:36:27,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 80. [2023-02-15 21:36:27,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 57 states have internal predecessors, (60), 11 states have call successors, (11), 4 states have call predecessors, (11), 14 states have return successors, (34), 18 states have call predecessors, (34), 11 states have call successors, (34) [2023-02-15 21:36:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 105 transitions. [2023-02-15 21:36:27,605 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 105 transitions. Word has length 37 [2023-02-15 21:36:27,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:27,606 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 105 transitions. [2023-02-15 21:36:27,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2023-02-15 21:36:27,606 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 105 transitions. [2023-02-15 21:36:27,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 21:36:27,607 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:27,607 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:27,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 21:36:27,813 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,SelfDestructingSolverStorable11 [2023-02-15 21:36:27,813 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:27,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:27,814 INFO L85 PathProgramCache]: Analyzing trace with hash -238590844, now seen corresponding path program 2 times [2023-02-15 21:36:27,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:27,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146022951] [2023-02-15 21:36:27,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:27,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:27,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:36:27,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:27,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:27,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:28,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:28,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:28,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 21:36:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:28,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 21:36:28,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:28,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146022951] [2023-02-15 21:36:28,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146022951] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:28,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188431063] [2023-02-15 21:36:28,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:36:28,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:28,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:28,077 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:36:28,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 21:36:28,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:36:28,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:36:28,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 21:36:28,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 21:36:28,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 21:36:28,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188431063] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:28,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:28,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 21 [2023-02-15 21:36:28,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172087301] [2023-02-15 21:36:28,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:28,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 21:36:28,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:28,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 21:36:28,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2023-02-15 21:36:28,595 INFO L87 Difference]: Start difference. First operand 80 states and 105 transitions. Second operand has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 9 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 6 states have call predecessors, (10), 9 states have call successors, (10) [2023-02-15 21:36:28,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:28,769 INFO L93 Difference]: Finished difference Result 90 states and 118 transitions. [2023-02-15 21:36:28,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 21:36:28,769 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 9 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 6 states have call predecessors, (10), 9 states have call successors, (10) Word has length 37 [2023-02-15 21:36:28,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:28,770 INFO L225 Difference]: With dead ends: 90 [2023-02-15 21:36:28,770 INFO L226 Difference]: Without dead ends: 86 [2023-02-15 21:36:28,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 8 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2023-02-15 21:36:28,771 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:28,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 178 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:36:28,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-15 21:36:28,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2023-02-15 21:36:28,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 10 states have call successors, (10), 4 states have call predecessors, (10), 9 states have return successors, (19), 13 states have call predecessors, (19), 10 states have call successors, (19) [2023-02-15 21:36:28,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2023-02-15 21:36:28,775 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 37 [2023-02-15 21:36:28,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:28,776 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2023-02-15 21:36:28,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 9 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 6 states have call predecessors, (10), 9 states have call successors, (10) [2023-02-15 21:36:28,776 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2023-02-15 21:36:28,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 21:36:28,776 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:28,776 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:28,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 21:36:28,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:28,982 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:28,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:28,983 INFO L85 PathProgramCache]: Analyzing trace with hash -124726374, now seen corresponding path program 2 times [2023-02-15 21:36:28,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:28,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696840360] [2023-02-15 21:36:28,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:28,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:28,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:29,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:36:29,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:29,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:29,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 21:36:29,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:29,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:29,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 21:36:29,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:29,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696840360] [2023-02-15 21:36:29,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696840360] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:29,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059900660] [2023-02-15 21:36:29,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:36:29,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:29,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:29,268 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:36:29,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 21:36:29,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:36:29,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:36:29,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-15 21:36:29,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:36:29,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:29,919 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 21:36:29,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059900660] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:29,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:29,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 15] total 24 [2023-02-15 21:36:29,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136129110] [2023-02-15 21:36:29,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:29,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 21:36:29,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:29,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 21:36:29,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2023-02-15 21:36:29,921 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 24 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2023-02-15 21:36:30,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:30,219 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2023-02-15 21:36:30,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 21:36:30,219 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) Word has length 43 [2023-02-15 21:36:30,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:30,220 INFO L225 Difference]: With dead ends: 76 [2023-02-15 21:36:30,220 INFO L226 Difference]: Without dead ends: 67 [2023-02-15 21:36:30,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 72 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2023-02-15 21:36:30,221 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 34 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:30,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 267 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:36:30,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-15 21:36:30,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2023-02-15 21:36:30,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 9 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (14), 10 states have call predecessors, (14), 9 states have call successors, (14) [2023-02-15 21:36:30,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2023-02-15 21:36:30,224 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 43 [2023-02-15 21:36:30,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:30,224 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2023-02-15 21:36:30,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2023-02-15 21:36:30,224 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2023-02-15 21:36:30,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 21:36:30,224 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:30,224 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:30,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-15 21:36:30,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:30,425 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:30,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:30,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1996237866, now seen corresponding path program 3 times [2023-02-15 21:36:30,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:30,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106314437] [2023-02-15 21:36:30,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:30,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:30,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:36:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:30,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:30,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:30,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 21:36:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:30,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:30,673 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:36:30,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:30,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106314437] [2023-02-15 21:36:30,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106314437] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:30,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052216187] [2023-02-15 21:36:30,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:36:30,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:30,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:30,691 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:36:30,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 21:36:30,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 21:36:30,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:36:30,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 21:36:30,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 21:36:30,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:31,656 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 21:36:31,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052216187] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:31,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:31,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 35 [2023-02-15 21:36:31,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478302336] [2023-02-15 21:36:31,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:31,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-15 21:36:31,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:31,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-15 21:36:31,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 21:36:31,658 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 35 states, 33 states have (on average 2.272727272727273) internal successors, (75), 28 states have internal predecessors, (75), 14 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-15 21:36:31,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:31,951 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2023-02-15 21:36:31,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 21:36:31,952 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.272727272727273) internal successors, (75), 28 states have internal predecessors, (75), 14 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) Word has length 44 [2023-02-15 21:36:31,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:31,953 INFO L225 Difference]: With dead ends: 86 [2023-02-15 21:36:31,953 INFO L226 Difference]: Without dead ends: 82 [2023-02-15 21:36:31,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 69 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=214, Invalid=1678, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 21:36:31,954 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 62 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:31,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 327 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:36:31,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-02-15 21:36:31,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 67. [2023-02-15 21:36:31,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 48 states have internal predecessors, (52), 10 states have call successors, (10), 4 states have call predecessors, (10), 10 states have return successors, (21), 14 states have call predecessors, (21), 10 states have call successors, (21) [2023-02-15 21:36:31,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2023-02-15 21:36:31,958 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 44 [2023-02-15 21:36:31,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:31,958 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2023-02-15 21:36:31,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.272727272727273) internal successors, (75), 28 states have internal predecessors, (75), 14 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-15 21:36:31,958 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2023-02-15 21:36:31,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 21:36:31,958 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:31,959 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:31,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-15 21:36:32,168 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,SelfDestructingSolverStorable14 [2023-02-15 21:36:32,169 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:32,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:32,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1270773450, now seen corresponding path program 1 times [2023-02-15 21:36:32,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:32,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810444033] [2023-02-15 21:36:32,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:32,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:32,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:32,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:36:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:32,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:32,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:32,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 21:36:32,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:32,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:32,397 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:36:32,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:32,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810444033] [2023-02-15 21:36:32,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810444033] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:32,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97003164] [2023-02-15 21:36:32,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:32,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:32,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:32,400 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:36:32,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 21:36:32,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:32,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-15 21:36:32,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 21:36:32,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:33,300 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 21:36:33,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97003164] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:33,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:33,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 18] total 34 [2023-02-15 21:36:33,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672440180] [2023-02-15 21:36:33,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:33,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 21:36:33,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:33,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 21:36:33,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 21:36:33,302 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand has 34 states, 29 states have (on average 2.206896551724138) internal successors, (64), 27 states have internal predecessors, (64), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (13), 9 states have call predecessors, (13), 12 states have call successors, (13) [2023-02-15 21:36:33,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:33,765 INFO L93 Difference]: Finished difference Result 103 states and 134 transitions. [2023-02-15 21:36:33,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 21:36:33,765 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 2.206896551724138) internal successors, (64), 27 states have internal predecessors, (64), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (13), 9 states have call predecessors, (13), 12 states have call successors, (13) Word has length 44 [2023-02-15 21:36:33,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:33,766 INFO L225 Difference]: With dead ends: 103 [2023-02-15 21:36:33,766 INFO L226 Difference]: Without dead ends: 99 [2023-02-15 21:36:33,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 67 SyntacticMatches, 9 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=252, Invalid=1728, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 21:36:33,767 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 43 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:33,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 430 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:36:33,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-02-15 21:36:33,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2023-02-15 21:36:33,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 10 states have call successors, (10), 4 states have call predecessors, (10), 11 states have return successors, (24), 15 states have call predecessors, (24), 10 states have call successors, (24) [2023-02-15 21:36:33,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2023-02-15 21:36:33,778 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 44 [2023-02-15 21:36:33,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:33,779 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2023-02-15 21:36:33,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 2.206896551724138) internal successors, (64), 27 states have internal predecessors, (64), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (13), 9 states have call predecessors, (13), 12 states have call successors, (13) [2023-02-15 21:36:33,779 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2023-02-15 21:36:33,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 21:36:33,779 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:33,780 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:33,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 21:36:33,995 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,SelfDestructingSolverStorable15 [2023-02-15 21:36:33,995 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:33,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:33,996 INFO L85 PathProgramCache]: Analyzing trace with hash 132450678, now seen corresponding path program 2 times [2023-02-15 21:36:33,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:33,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891682056] [2023-02-15 21:36:33,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:33,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:34,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:34,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:36:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:34,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:34,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:34,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 21:36:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:34,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:34,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:34,226 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-15 21:36:34,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:34,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891682056] [2023-02-15 21:36:34,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891682056] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:34,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279552808] [2023-02-15 21:36:34,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:36:34,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:34,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:34,227 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) [2023-02-15 21:36:34,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 21:36:34,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:36:34,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:36:34,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-15 21:36:34,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:34,437 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-15 21:36:34,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 21:36:34,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279552808] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:34,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:34,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 21 [2023-02-15 21:36:34,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505901064] [2023-02-15 21:36:34,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:34,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 21:36:34,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:34,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 21:36:34,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2023-02-15 21:36:34,966 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 21 states, 20 states have (on average 2.75) internal successors, (55), 18 states have internal predecessors, (55), 8 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) [2023-02-15 21:36:35,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:35,125 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2023-02-15 21:36:35,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 21:36:35,126 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.75) internal successors, (55), 18 states have internal predecessors, (55), 8 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) Word has length 44 [2023-02-15 21:36:35,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:35,127 INFO L225 Difference]: With dead ends: 95 [2023-02-15 21:36:35,127 INFO L226 Difference]: Without dead ends: 91 [2023-02-15 21:36:35,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 78 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2023-02-15 21:36:35,127 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 56 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:35,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 212 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:36:35,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-15 21:36:35,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 75. [2023-02-15 21:36:35,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 10 states have call successors, (10), 4 states have call predecessors, (10), 12 states have return successors, (27), 18 states have call predecessors, (27), 10 states have call successors, (27) [2023-02-15 21:36:35,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 95 transitions. [2023-02-15 21:36:35,132 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 95 transitions. Word has length 44 [2023-02-15 21:36:35,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:35,132 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 95 transitions. [2023-02-15 21:36:35,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.75) internal successors, (55), 18 states have internal predecessors, (55), 8 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) [2023-02-15 21:36:35,132 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 95 transitions. [2023-02-15 21:36:35,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 21:36:35,135 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:35,135 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:35,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 21:36:35,340 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,SelfDestructingSolverStorable16 [2023-02-15 21:36:35,340 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:35,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:35,341 INFO L85 PathProgramCache]: Analyzing trace with hash 815065250, now seen corresponding path program 3 times [2023-02-15 21:36:35,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:35,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927390739] [2023-02-15 21:36:35,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:35,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:35,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:36:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:35,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:35,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:35,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:35,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:35,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:35,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:36:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:35,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:35,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 21:36:35,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:35,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927390739] [2023-02-15 21:36:35,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927390739] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:35,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71568116] [2023-02-15 21:36:35,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:36:35,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:35,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:35,642 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) [2023-02-15 21:36:35,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 21:36:35,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 21:36:35,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:36:35,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 21:36:35,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 21:36:35,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:37,387 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:36:37,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71568116] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:37,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:37,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 20] total 44 [2023-02-15 21:36:37,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187779192] [2023-02-15 21:36:37,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:37,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-15 21:36:37,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:37,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-15 21:36:37,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1750, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 21:36:37,390 INFO L87 Difference]: Start difference. First operand 75 states and 95 transitions. Second operand has 44 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 32 states have internal predecessors, (89), 16 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (18), 14 states have call predecessors, (18), 16 states have call successors, (18) [2023-02-15 21:36:38,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:38,117 INFO L93 Difference]: Finished difference Result 123 states and 157 transitions. [2023-02-15 21:36:38,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 21:36:38,118 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 32 states have internal predecessors, (89), 16 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (18), 14 states have call predecessors, (18), 16 states have call successors, (18) Word has length 52 [2023-02-15 21:36:38,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:38,118 INFO L225 Difference]: With dead ends: 123 [2023-02-15 21:36:38,118 INFO L226 Difference]: Without dead ends: 119 [2023-02-15 21:36:38,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=329, Invalid=2977, Unknown=0, NotChecked=0, Total=3306 [2023-02-15 21:36:38,120 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:38,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 433 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 21:36:38,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-15 21:36:38,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 80. [2023-02-15 21:36:38,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 54 states have internal predecessors, (62), 10 states have call successors, (10), 4 states have call predecessors, (10), 13 states have return successors, (30), 21 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-15 21:36:38,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2023-02-15 21:36:38,124 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 52 [2023-02-15 21:36:38,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:38,137 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2023-02-15 21:36:38,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 32 states have internal predecessors, (89), 16 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (18), 14 states have call predecessors, (18), 16 states have call successors, (18) [2023-02-15 21:36:38,138 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2023-02-15 21:36:38,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 21:36:38,139 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:38,139 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:38,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-15 21:36:38,344 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,SelfDestructingSolverStorable17 [2023-02-15 21:36:38,345 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:38,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:38,345 INFO L85 PathProgramCache]: Analyzing trace with hash 850048834, now seen corresponding path program 4 times [2023-02-15 21:36:38,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:38,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236800097] [2023-02-15 21:36:38,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:38,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:38,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:36:38,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:38,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:38,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:38,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:38,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:38,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:38,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:36:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:38,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:38,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:38,736 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 21:36:38,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:38,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236800097] [2023-02-15 21:36:38,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236800097] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:38,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183847689] [2023-02-15 21:36:38,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 21:36:38,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:38,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:38,753 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) [2023-02-15 21:36:38,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 21:36:38,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 21:36:38,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:36:38,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 21:36:38,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:39,086 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 21:36:39,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:40,023 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:36:40,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183847689] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:40,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:40,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 21] total 37 [2023-02-15 21:36:40,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595976597] [2023-02-15 21:36:40,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:40,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-15 21:36:40,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:40,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-15 21:36:40,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1204, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 21:36:40,026 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand has 37 states, 32 states have (on average 2.25) internal successors, (72), 28 states have internal predecessors, (72), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (16), 11 states have call predecessors, (16), 13 states have call successors, (16) [2023-02-15 21:36:40,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:40,609 INFO L93 Difference]: Finished difference Result 141 states and 187 transitions. [2023-02-15 21:36:40,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-15 21:36:40,610 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 32 states have (on average 2.25) internal successors, (72), 28 states have internal predecessors, (72), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (16), 11 states have call predecessors, (16), 13 states have call successors, (16) Word has length 52 [2023-02-15 21:36:40,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:40,611 INFO L225 Difference]: With dead ends: 141 [2023-02-15 21:36:40,611 INFO L226 Difference]: Without dead ends: 137 [2023-02-15 21:36:40,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 82 SyntacticMatches, 11 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=351, Invalid=2301, Unknown=0, NotChecked=0, Total=2652 [2023-02-15 21:36:40,612 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 40 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:40,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 477 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:36:40,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-02-15 21:36:40,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 80. [2023-02-15 21:36:40,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 54 states have internal predecessors, (62), 10 states have call successors, (10), 4 states have call predecessors, (10), 13 states have return successors, (30), 21 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-15 21:36:40,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2023-02-15 21:36:40,622 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 52 [2023-02-15 21:36:40,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:40,622 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2023-02-15 21:36:40,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 32 states have (on average 2.25) internal successors, (72), 28 states have internal predecessors, (72), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (16), 11 states have call predecessors, (16), 13 states have call successors, (16) [2023-02-15 21:36:40,622 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2023-02-15 21:36:40,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 21:36:40,623 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:40,623 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:40,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 21:36:40,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:40,833 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:40,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:40,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1543204190, now seen corresponding path program 5 times [2023-02-15 21:36:40,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:40,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689049294] [2023-02-15 21:36:40,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:40,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:41,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:36:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:41,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:41,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:41,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:41,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:41,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:41,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:36:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:41,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:41,316 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-15 21:36:41,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:41,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689049294] [2023-02-15 21:36:41,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689049294] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:41,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620036085] [2023-02-15 21:36:41,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 21:36:41,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:41,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:41,318 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) [2023-02-15 21:36:41,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 21:36:41,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-15 21:36:41,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:36:41,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-15 21:36:41,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-15 21:36:41,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:42,614 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:36:42,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620036085] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:42,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:42,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 22] total 41 [2023-02-15 21:36:42,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836311204] [2023-02-15 21:36:42,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:42,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-15 21:36:42,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:42,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-15 21:36:42,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1496, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 21:36:42,616 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand has 41 states, 33 states have (on average 2.272727272727273) internal successors, (75), 33 states have internal predecessors, (75), 15 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 10 states have call predecessors, (17), 15 states have call successors, (17) [2023-02-15 21:36:43,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:43,034 INFO L93 Difference]: Finished difference Result 151 states and 203 transitions. [2023-02-15 21:36:43,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 21:36:43,036 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 33 states have (on average 2.272727272727273) internal successors, (75), 33 states have internal predecessors, (75), 15 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 10 states have call predecessors, (17), 15 states have call successors, (17) Word has length 52 [2023-02-15 21:36:43,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:43,037 INFO L225 Difference]: With dead ends: 151 [2023-02-15 21:36:43,037 INFO L226 Difference]: Without dead ends: 147 [2023-02-15 21:36:43,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 80 SyntacticMatches, 11 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=323, Invalid=2329, Unknown=0, NotChecked=0, Total=2652 [2023-02-15 21:36:43,038 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 64 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:43,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 505 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:36:43,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-02-15 21:36:43,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 97. [2023-02-15 21:36:43,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 states have internal predecessors, (73), 10 states have call successors, (10), 4 states have call predecessors, (10), 19 states have return successors, (47), 26 states have call predecessors, (47), 10 states have call successors, (47) [2023-02-15 21:36:43,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 130 transitions. [2023-02-15 21:36:43,044 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 130 transitions. Word has length 52 [2023-02-15 21:36:43,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:43,044 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 130 transitions. [2023-02-15 21:36:43,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 33 states have (on average 2.272727272727273) internal successors, (75), 33 states have internal predecessors, (75), 15 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 10 states have call predecessors, (17), 15 states have call successors, (17) [2023-02-15 21:36:43,047 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 130 transitions. [2023-02-15 21:36:43,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 21:36:43,048 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:43,048 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:43,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 21:36:43,254 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,SelfDestructingSolverStorable19 [2023-02-15 21:36:43,254 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:43,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:43,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1009898910, now seen corresponding path program 6 times [2023-02-15 21:36:43,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:43,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924102176] [2023-02-15 21:36:43,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:43,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:43,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:36:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:43,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:43,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:43,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:43,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:36:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:43,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:43,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:43,573 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 21:36:43,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:43,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924102176] [2023-02-15 21:36:43,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924102176] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:43,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330614698] [2023-02-15 21:36:43,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 21:36:43,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:43,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:43,589 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) [2023-02-15 21:36:43,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 21:36:43,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-15 21:36:43,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:36:43,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-15 21:36:43,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:44,084 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 21:36:44,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:36:45,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330614698] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:45,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:45,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 22] total 51 [2023-02-15 21:36:45,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857188846] [2023-02-15 21:36:45,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:45,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-15 21:36:45,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:45,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-15 21:36:45,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=2364, Unknown=0, NotChecked=0, Total=2550 [2023-02-15 21:36:45,466 INFO L87 Difference]: Start difference. First operand 97 states and 130 transitions. Second operand has 51 states, 45 states have (on average 2.022222222222222) internal successors, (91), 39 states have internal predecessors, (91), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (18), 14 states have call predecessors, (18), 17 states have call successors, (18) [2023-02-15 21:36:46,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:46,318 INFO L93 Difference]: Finished difference Result 209 states and 289 transitions. [2023-02-15 21:36:46,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 21:36:46,318 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 45 states have (on average 2.022222222222222) internal successors, (91), 39 states have internal predecessors, (91), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (18), 14 states have call predecessors, (18), 17 states have call successors, (18) Word has length 52 [2023-02-15 21:36:46,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:46,319 INFO L225 Difference]: With dead ends: 209 [2023-02-15 21:36:46,319 INFO L226 Difference]: Without dead ends: 205 [2023-02-15 21:36:46,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=492, Invalid=4200, Unknown=0, NotChecked=0, Total=4692 [2023-02-15 21:36:46,321 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 117 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:46,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 447 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 21:36:46,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-02-15 21:36:46,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 97. [2023-02-15 21:36:46,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 states have internal predecessors, (73), 10 states have call successors, (10), 4 states have call predecessors, (10), 19 states have return successors, (47), 26 states have call predecessors, (47), 10 states have call successors, (47) [2023-02-15 21:36:46,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 130 transitions. [2023-02-15 21:36:46,332 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 130 transitions. Word has length 52 [2023-02-15 21:36:46,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:46,332 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 130 transitions. [2023-02-15 21:36:46,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 45 states have (on average 2.022222222222222) internal successors, (91), 39 states have internal predecessors, (91), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (18), 14 states have call predecessors, (18), 17 states have call successors, (18) [2023-02-15 21:36:46,333 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 130 transitions. [2023-02-15 21:36:46,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-15 21:36:46,333 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:46,334 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:46,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-15 21:36:46,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:46,539 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:46,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:46,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1539510102, now seen corresponding path program 7 times [2023-02-15 21:36:46,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:46,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461519590] [2023-02-15 21:36:46,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:46,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:46,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:46,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:36:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:46,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:46,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:46,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:46,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:46,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:46,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:46,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 21:36:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:46,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:46,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:46,917 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-15 21:36:46,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:46,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461519590] [2023-02-15 21:36:46,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461519590] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:46,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628718863] [2023-02-15 21:36:46,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 21:36:46,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:46,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:46,919 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) [2023-02-15 21:36:46,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 21:36:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:47,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 21:36:47,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-15 21:36:47,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 7 proven. 47 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-15 21:36:48,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628718863] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:48,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:48,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 25] total 43 [2023-02-15 21:36:48,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168854023] [2023-02-15 21:36:48,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:48,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-15 21:36:48,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:48,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-15 21:36:48,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1652, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 21:36:48,661 INFO L87 Difference]: Start difference. First operand 97 states and 130 transitions. Second operand has 43 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 16 states have call successors, (18), 1 states have call predecessors, (18), 8 states have return successors, (20), 11 states have call predecessors, (20), 16 states have call successors, (20) [2023-02-15 21:36:49,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:49,337 INFO L93 Difference]: Finished difference Result 183 states and 250 transitions. [2023-02-15 21:36:49,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 21:36:49,340 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 16 states have call successors, (18), 1 states have call predecessors, (18), 8 states have return successors, (20), 11 states have call predecessors, (20), 16 states have call successors, (20) Word has length 60 [2023-02-15 21:36:49,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:49,341 INFO L225 Difference]: With dead ends: 183 [2023-02-15 21:36:49,341 INFO L226 Difference]: Without dead ends: 179 [2023-02-15 21:36:49,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 96 SyntacticMatches, 13 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=427, Invalid=2879, Unknown=0, NotChecked=0, Total=3306 [2023-02-15 21:36:49,342 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 64 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:49,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 531 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 21:36:49,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-02-15 21:36:49,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 94. [2023-02-15 21:36:49,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 10 states have call successors, (10), 4 states have call predecessors, (10), 18 states have return successors, (44), 25 states have call predecessors, (44), 10 states have call successors, (44) [2023-02-15 21:36:49,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2023-02-15 21:36:49,352 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 125 transitions. Word has length 60 [2023-02-15 21:36:49,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:49,352 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 125 transitions. [2023-02-15 21:36:49,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 16 states have call successors, (18), 1 states have call predecessors, (18), 8 states have return successors, (20), 11 states have call predecessors, (20), 16 states have call successors, (20) [2023-02-15 21:36:49,352 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 125 transitions. [2023-02-15 21:36:49,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-15 21:36:49,356 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:49,356 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:49,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 21:36:49,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:49,562 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:49,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:49,562 INFO L85 PathProgramCache]: Analyzing trace with hash 368513814, now seen corresponding path program 8 times [2023-02-15 21:36:49,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:49,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463419927] [2023-02-15 21:36:49,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:49,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:49,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:36:49,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:49,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:49,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:49,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:49,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:49,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:49,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:49,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:49,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 21:36:49,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:49,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-15 21:36:50,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:50,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463419927] [2023-02-15 21:36:50,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463419927] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:50,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162603612] [2023-02-15 21:36:50,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:36:50,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:50,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:50,025 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) [2023-02-15 21:36:50,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 21:36:50,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:36:50,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:36:50,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-15 21:36:50,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:50,581 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 19 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 21:36:50,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-15 21:36:52,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162603612] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:52,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:52,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 26] total 59 [2023-02-15 21:36:52,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056731400] [2023-02-15 21:36:52,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:52,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-15 21:36:52,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:52,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-15 21:36:52,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=3182, Unknown=0, NotChecked=0, Total=3422 [2023-02-15 21:36:52,693 INFO L87 Difference]: Start difference. First operand 94 states and 125 transitions. Second operand has 59 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 46 states have internal predecessors, (97), 19 states have call successors, (19), 1 states have call predecessors, (19), 14 states have return successors, (21), 15 states have call predecessors, (21), 19 states have call successors, (21) [2023-02-15 21:36:53,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:53,806 INFO L93 Difference]: Finished difference Result 188 states and 260 transitions. [2023-02-15 21:36:53,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-15 21:36:53,806 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 46 states have internal predecessors, (97), 19 states have call successors, (19), 1 states have call predecessors, (19), 14 states have return successors, (21), 15 states have call predecessors, (21), 19 states have call successors, (21) Word has length 60 [2023-02-15 21:36:53,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:53,807 INFO L225 Difference]: With dead ends: 188 [2023-02-15 21:36:53,807 INFO L226 Difference]: Without dead ends: 184 [2023-02-15 21:36:53,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 7 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=779, Invalid=5541, Unknown=0, NotChecked=0, Total=6320 [2023-02-15 21:36:53,809 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 106 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:53,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 603 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1104 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 21:36:53,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-02-15 21:36:53,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 93. [2023-02-15 21:36:53,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 64 states have (on average 1.09375) internal successors, (70), 64 states have internal predecessors, (70), 10 states have call successors, (10), 4 states have call predecessors, (10), 18 states have return successors, (44), 24 states have call predecessors, (44), 10 states have call successors, (44) [2023-02-15 21:36:53,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2023-02-15 21:36:53,816 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 124 transitions. Word has length 60 [2023-02-15 21:36:53,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:53,816 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 124 transitions. [2023-02-15 21:36:53,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 46 states have internal predecessors, (97), 19 states have call successors, (19), 1 states have call predecessors, (19), 14 states have return successors, (21), 15 states have call predecessors, (21), 19 states have call successors, (21) [2023-02-15 21:36:53,817 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 124 transitions. [2023-02-15 21:36:53,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 21:36:53,818 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:53,818 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:53,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 21:36:54,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-02-15 21:36:54,024 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:54,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:54,024 INFO L85 PathProgramCache]: Analyzing trace with hash 861262790, now seen corresponding path program 4 times [2023-02-15 21:36:54,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:54,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030250228] [2023-02-15 21:36:54,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:54,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:54,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:36:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:54,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:54,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:54,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 21:36:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:54,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:54,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:54,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:54,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 21:36:54,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:54,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030250228] [2023-02-15 21:36:54,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030250228] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:54,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923581366] [2023-02-15 21:36:54,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 21:36:54,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:54,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:54,252 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) [2023-02-15 21:36:54,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 21:36:54,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 21:36:54,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:36:54,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-15 21:36:54,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:54,530 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 21:36:54,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 21:36:55,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923581366] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:55,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:55,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 18] total 27 [2023-02-15 21:36:55,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793673648] [2023-02-15 21:36:55,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:55,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 21:36:55,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:55,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 21:36:55,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2023-02-15 21:36:55,278 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. Second operand has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 7 states have call predecessors, (14), 12 states have call successors, (14) [2023-02-15 21:36:55,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:55,553 INFO L93 Difference]: Finished difference Result 121 states and 162 transitions. [2023-02-15 21:36:55,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 21:36:55,554 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 7 states have call predecessors, (14), 12 states have call successors, (14) Word has length 51 [2023-02-15 21:36:55,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:55,555 INFO L225 Difference]: With dead ends: 121 [2023-02-15 21:36:55,555 INFO L226 Difference]: Without dead ends: 117 [2023-02-15 21:36:55,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 87 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 21:36:55,557 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 37 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:55,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 362 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:36:55,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-02-15 21:36:55,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 104. [2023-02-15 21:36:55,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 71 states have internal predecessors, (77), 11 states have call successors, (11), 4 states have call predecessors, (11), 21 states have return successors, (52), 28 states have call predecessors, (52), 11 states have call successors, (52) [2023-02-15 21:36:55,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 140 transitions. [2023-02-15 21:36:55,567 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 140 transitions. Word has length 51 [2023-02-15 21:36:55,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:55,568 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 140 transitions. [2023-02-15 21:36:55,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 7 states have call predecessors, (14), 12 states have call successors, (14) [2023-02-15 21:36:55,568 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 140 transitions. [2023-02-15 21:36:55,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 21:36:55,568 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:55,569 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:55,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 21:36:55,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:55,774 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:55,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:55,776 INFO L85 PathProgramCache]: Analyzing trace with hash -2103225754, now seen corresponding path program 9 times [2023-02-15 21:36:55,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:55,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797004132] [2023-02-15 21:36:55,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:55,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:55,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:36:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:55,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:55,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:55,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:55,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 21:36:55,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:56,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:56,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 21:36:56,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:56,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797004132] [2023-02-15 21:36:56,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797004132] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:56,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009540834] [2023-02-15 21:36:56,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:36:56,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:56,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:56,059 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) [2023-02-15 21:36:56,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 21:36:56,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 21:36:56,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:36:56,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-15 21:36:56,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:56,363 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 21:36:56,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 21:36:57,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009540834] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:57,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:57,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 18] total 27 [2023-02-15 21:36:57,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307870654] [2023-02-15 21:36:57,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:57,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 21:36:57,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:57,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 21:36:57,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2023-02-15 21:36:57,150 INFO L87 Difference]: Start difference. First operand 104 states and 140 transitions. Second operand has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 7 states have call predecessors, (14), 12 states have call successors, (14) [2023-02-15 21:36:57,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:57,416 INFO L93 Difference]: Finished difference Result 123 states and 162 transitions. [2023-02-15 21:36:57,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 21:36:57,416 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 7 states have call predecessors, (14), 12 states have call successors, (14) Word has length 51 [2023-02-15 21:36:57,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:57,418 INFO L225 Difference]: With dead ends: 123 [2023-02-15 21:36:57,418 INFO L226 Difference]: Without dead ends: 119 [2023-02-15 21:36:57,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 86 SyntacticMatches, 13 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 21:36:57,419 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:57,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 360 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:36:57,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-15 21:36:57,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 104. [2023-02-15 21:36:57,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 71 states have internal predecessors, (77), 11 states have call successors, (11), 4 states have call predecessors, (11), 21 states have return successors, (52), 28 states have call predecessors, (52), 11 states have call successors, (52) [2023-02-15 21:36:57,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 140 transitions. [2023-02-15 21:36:57,433 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 140 transitions. Word has length 51 [2023-02-15 21:36:57,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:57,433 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 140 transitions. [2023-02-15 21:36:57,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 7 states have call predecessors, (14), 12 states have call successors, (14) [2023-02-15 21:36:57,434 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 140 transitions. [2023-02-15 21:36:57,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 21:36:57,436 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:57,436 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:57,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-15 21:36:57,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:57,641 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:57,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:57,642 INFO L85 PathProgramCache]: Analyzing trace with hash -262469082, now seen corresponding path program 10 times [2023-02-15 21:36:57,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:57,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856237808] [2023-02-15 21:36:57,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:57,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:57,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:57,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:36:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:57,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:57,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:57,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 21:36:57,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:57,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:57,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 21:36:57,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:57,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856237808] [2023-02-15 21:36:57,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856237808] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:57,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391413947] [2023-02-15 21:36:57,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 21:36:57,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:57,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:57,960 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) [2023-02-15 21:36:58,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 21:36:58,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 21:36:58,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:36:58,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 21:36:58,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:58,323 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 21:36:58,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-15 21:36:59,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391413947] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:59,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:59,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 34 [2023-02-15 21:36:59,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227326010] [2023-02-15 21:36:59,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:59,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 21:36:59,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:59,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 21:36:59,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 21:36:59,112 INFO L87 Difference]: Start difference. First operand 104 states and 140 transitions. Second operand has 34 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (16), 9 states have call predecessors, (16), 12 states have call successors, (16) [2023-02-15 21:36:59,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:59,428 INFO L93 Difference]: Finished difference Result 120 states and 161 transitions. [2023-02-15 21:36:59,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 21:36:59,429 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (16), 9 states have call predecessors, (16), 12 states have call successors, (16) Word has length 51 [2023-02-15 21:36:59,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:59,430 INFO L225 Difference]: With dead ends: 120 [2023-02-15 21:36:59,430 INFO L226 Difference]: Without dead ends: 111 [2023-02-15 21:36:59,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 82 SyntacticMatches, 12 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 21:36:59,431 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 73 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:59,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 284 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:36:59,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-02-15 21:36:59,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2023-02-15 21:36:59,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 73 states have internal predecessors, (80), 11 states have call successors, (11), 4 states have call predecessors, (11), 22 states have return successors, (54), 30 states have call predecessors, (54), 11 states have call successors, (54) [2023-02-15 21:36:59,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 145 transitions. [2023-02-15 21:36:59,445 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 145 transitions. Word has length 51 [2023-02-15 21:36:59,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:59,445 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 145 transitions. [2023-02-15 21:36:59,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (16), 9 states have call predecessors, (16), 12 states have call successors, (16) [2023-02-15 21:36:59,446 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 145 transitions. [2023-02-15 21:36:59,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 21:36:59,451 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:59,451 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:59,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-15 21:36:59,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:59,657 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:59,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:59,658 INFO L85 PathProgramCache]: Analyzing trace with hash 334535194, now seen corresponding path program 5 times [2023-02-15 21:36:59,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:59,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190015544] [2023-02-15 21:36:59,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:59,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:59,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:59,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:36:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:59,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:59,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:59,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:59,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:59,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:59,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:36:59,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:59,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:59,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:59,970 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-15 21:36:59,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:59,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190015544] [2023-02-15 21:36:59,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190015544] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:59,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37645239] [2023-02-15 21:36:59,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 21:36:59,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:59,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:59,973 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) [2023-02-15 21:36:59,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-15 21:37:00,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-15 21:37:00,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:37:00,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-15 21:37:00,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:37:00,430 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-15 21:37:00,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:37:01,920 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 21:37:01,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37645239] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:37:01,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:37:01,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 22] total 45 [2023-02-15 21:37:01,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784840184] [2023-02-15 21:37:01,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:37:01,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-15 21:37:01,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:37:01,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-15 21:37:01,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1823, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 21:37:01,923 INFO L87 Difference]: Start difference. First operand 108 states and 145 transitions. Second operand has 45 states, 42 states have (on average 2.142857142857143) internal successors, (90), 34 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (21), 14 states have call predecessors, (21), 17 states have call successors, (21) [2023-02-15 21:37:02,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:37:02,495 INFO L93 Difference]: Finished difference Result 144 states and 190 transitions. [2023-02-15 21:37:02,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 21:37:02,496 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 2.142857142857143) internal successors, (90), 34 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (21), 14 states have call predecessors, (21), 17 states have call successors, (21) Word has length 59 [2023-02-15 21:37:02,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:37:02,497 INFO L225 Difference]: With dead ends: 144 [2023-02-15 21:37:02,497 INFO L226 Difference]: Without dead ends: 140 [2023-02-15 21:37:02,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 94 SyntacticMatches, 8 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=315, Invalid=2655, Unknown=0, NotChecked=0, Total=2970 [2023-02-15 21:37:02,498 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 76 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 21:37:02,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 562 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 21:37:02,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-02-15 21:37:02,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 108. [2023-02-15 21:37:02,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 73 states have internal predecessors, (80), 11 states have call successors, (11), 4 states have call predecessors, (11), 22 states have return successors, (54), 30 states have call predecessors, (54), 11 states have call successors, (54) [2023-02-15 21:37:02,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 145 transitions. [2023-02-15 21:37:02,504 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 145 transitions. Word has length 59 [2023-02-15 21:37:02,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:37:02,504 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 145 transitions. [2023-02-15 21:37:02,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 2.142857142857143) internal successors, (90), 34 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (21), 14 states have call predecessors, (21), 17 states have call successors, (21) [2023-02-15 21:37:02,505 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 145 transitions. [2023-02-15 21:37:02,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 21:37:02,505 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:37:02,505 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:37:02,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-15 21:37:02,706 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,SelfDestructingSolverStorable26 [2023-02-15 21:37:02,706 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:37:02,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:37:02,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1972765050, now seen corresponding path program 11 times [2023-02-15 21:37:02,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:37:02,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726530602] [2023-02-15 21:37:02,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:37:02,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:37:02,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:02,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:37:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:02,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:02,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:02,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:02,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:02,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:37:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:02,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:02,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-15 21:37:03,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:37:03,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726530602] [2023-02-15 21:37:03,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726530602] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:37:03,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290346761] [2023-02-15 21:37:03,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 21:37:03,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:03,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:37:03,013 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) [2023-02-15 21:37:03,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-15 21:37:03,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-15 21:37:03,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:37:03,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 21:37:03,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:37:03,323 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-15 21:37:03,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:37:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-15 21:37:04,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290346761] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:37:04,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:37:04,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 19] total 28 [2023-02-15 21:37:04,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710348073] [2023-02-15 21:37:04,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:37:04,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-15 21:37:04,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:37:04,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-15 21:37:04,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2023-02-15 21:37:04,161 INFO L87 Difference]: Start difference. First operand 108 states and 145 transitions. Second operand has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 23 states have internal predecessors, (72), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 8 states have call predecessors, (17), 12 states have call successors, (17) [2023-02-15 21:37:04,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:37:04,408 INFO L93 Difference]: Finished difference Result 141 states and 188 transitions. [2023-02-15 21:37:04,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 21:37:04,409 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 23 states have internal predecessors, (72), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 8 states have call predecessors, (17), 12 states have call successors, (17) Word has length 59 [2023-02-15 21:37:04,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:37:04,410 INFO L225 Difference]: With dead ends: 141 [2023-02-15 21:37:04,410 INFO L226 Difference]: Without dead ends: 137 [2023-02-15 21:37:04,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 103 SyntacticMatches, 15 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 21:37:04,410 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 60 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:37:04,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 378 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:37:04,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-02-15 21:37:04,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 116. [2023-02-15 21:37:04,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 80 states have (on average 1.075) internal successors, (86), 77 states have internal predecessors, (86), 11 states have call successors, (11), 4 states have call predecessors, (11), 24 states have return successors, (60), 34 states have call predecessors, (60), 11 states have call successors, (60) [2023-02-15 21:37:04,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 157 transitions. [2023-02-15 21:37:04,419 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 157 transitions. Word has length 59 [2023-02-15 21:37:04,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:37:04,419 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 157 transitions. [2023-02-15 21:37:04,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 23 states have internal predecessors, (72), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 8 states have call predecessors, (17), 12 states have call successors, (17) [2023-02-15 21:37:04,419 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 157 transitions. [2023-02-15 21:37:04,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 21:37:04,421 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:37:04,421 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:37:04,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-15 21:37:04,627 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,SelfDestructingSolverStorable27 [2023-02-15 21:37:04,627 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:37:04,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:37:04,628 INFO L85 PathProgramCache]: Analyzing trace with hash 12091098, now seen corresponding path program 12 times [2023-02-15 21:37:04,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:37:04,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275507733] [2023-02-15 21:37:04,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:37:04,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:37:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:04,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:37:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:04,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:04,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:04,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:04,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:04,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:04,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:04,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:37:04,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:04,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:04,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:04,927 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-15 21:37:04,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:37:04,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275507733] [2023-02-15 21:37:04,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275507733] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:37:04,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429894663] [2023-02-15 21:37:04,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 21:37:04,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:04,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:37:04,930 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) [2023-02-15 21:37:04,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-15 21:37:05,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-15 21:37:05,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:37:05,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 21:37:05,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:37:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-15 21:37:05,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:37:06,388 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-15 21:37:06,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429894663] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:37:06,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:37:06,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 19] total 28 [2023-02-15 21:37:06,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861198926] [2023-02-15 21:37:06,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:37:06,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-15 21:37:06,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:37:06,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-15 21:37:06,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2023-02-15 21:37:06,390 INFO L87 Difference]: Start difference. First operand 116 states and 157 transitions. Second operand has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 23 states have internal predecessors, (72), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 8 states have call predecessors, (17), 12 states have call successors, (17) [2023-02-15 21:37:06,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:37:06,711 INFO L93 Difference]: Finished difference Result 149 states and 200 transitions. [2023-02-15 21:37:06,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 21:37:06,711 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 23 states have internal predecessors, (72), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 8 states have call predecessors, (17), 12 states have call successors, (17) Word has length 59 [2023-02-15 21:37:06,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:37:06,712 INFO L225 Difference]: With dead ends: 149 [2023-02-15 21:37:06,712 INFO L226 Difference]: Without dead ends: 145 [2023-02-15 21:37:06,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 102 SyntacticMatches, 16 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 21:37:06,713 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 40 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:37:06,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 402 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:37:06,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-02-15 21:37:06,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 119. [2023-02-15 21:37:06,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 79 states have internal predecessors, (88), 11 states have call successors, (11), 4 states have call predecessors, (11), 25 states have return successors, (63), 35 states have call predecessors, (63), 11 states have call successors, (63) [2023-02-15 21:37:06,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 162 transitions. [2023-02-15 21:37:06,719 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 162 transitions. Word has length 59 [2023-02-15 21:37:06,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:37:06,719 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 162 transitions. [2023-02-15 21:37:06,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 23 states have internal predecessors, (72), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 8 states have call predecessors, (17), 12 states have call successors, (17) [2023-02-15 21:37:06,719 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 162 transitions. [2023-02-15 21:37:06,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 21:37:06,720 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:37:06,720 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:37:06,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-15 21:37:06,953 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,SelfDestructingSolverStorable28 [2023-02-15 21:37:06,953 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:37:06,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:37:06,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1626138758, now seen corresponding path program 13 times [2023-02-15 21:37:06,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:37:06,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742945794] [2023-02-15 21:37:06,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:37:06,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:37:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:07,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:37:07,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:07,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:07,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:07,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:07,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:07,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:37:07,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:07,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:07,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:07,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:07,358 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-15 21:37:07,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:37:07,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742945794] [2023-02-15 21:37:07,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742945794] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:37:07,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685234593] [2023-02-15 21:37:07,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 21:37:07,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:07,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:37:07,363 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) [2023-02-15 21:37:07,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-15 21:37:07,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:07,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-15 21:37:07,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:37:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-15 21:37:07,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:37:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 21:37:09,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685234593] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:37:09,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:37:09,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 23] total 42 [2023-02-15 21:37:09,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431356394] [2023-02-15 21:37:09,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:37:09,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-15 21:37:09,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:37:09,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-15 21:37:09,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1564, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 21:37:09,033 INFO L87 Difference]: Start difference. First operand 119 states and 162 transitions. Second operand has 42 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 33 states have internal predecessors, (80), 16 states have call successors, (16), 1 states have call predecessors, (16), 10 states have return successors, (20), 12 states have call predecessors, (20), 16 states have call successors, (20) [2023-02-15 21:37:09,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:37:09,469 INFO L93 Difference]: Finished difference Result 186 states and 258 transitions. [2023-02-15 21:37:09,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 21:37:09,470 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 33 states have internal predecessors, (80), 16 states have call successors, (16), 1 states have call predecessors, (16), 10 states have return successors, (20), 12 states have call predecessors, (20), 16 states have call successors, (20) Word has length 59 [2023-02-15 21:37:09,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:37:09,471 INFO L225 Difference]: With dead ends: 186 [2023-02-15 21:37:09,471 INFO L226 Difference]: Without dead ends: 182 [2023-02-15 21:37:09,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 95 SyntacticMatches, 12 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=2352, Unknown=0, NotChecked=0, Total=2652 [2023-02-15 21:37:09,472 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 48 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:37:09,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 657 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:37:09,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-02-15 21:37:09,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 131. [2023-02-15 21:37:09,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 90 states have (on average 1.0666666666666667) internal successors, (96), 87 states have internal predecessors, (96), 11 states have call successors, (11), 4 states have call predecessors, (11), 29 states have return successors, (75), 39 states have call predecessors, (75), 11 states have call successors, (75) [2023-02-15 21:37:09,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 182 transitions. [2023-02-15 21:37:09,486 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 182 transitions. Word has length 59 [2023-02-15 21:37:09,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:37:09,486 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 182 transitions. [2023-02-15 21:37:09,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 33 states have internal predecessors, (80), 16 states have call successors, (16), 1 states have call predecessors, (16), 10 states have return successors, (20), 12 states have call predecessors, (20), 16 states have call successors, (20) [2023-02-15 21:37:09,486 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 182 transitions. [2023-02-15 21:37:09,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 21:37:09,487 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:37:09,487 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:37:09,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-15 21:37:09,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:09,693 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:37:09,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:37:09,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1786558534, now seen corresponding path program 14 times [2023-02-15 21:37:09,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:37:09,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792152929] [2023-02-15 21:37:09,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:37:09,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:37:09,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:09,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:37:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:09,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:09,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:09,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:09,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:09,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:09,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:09,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:37:09,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:09,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:09,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:09,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:10,018 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-15 21:37:10,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:37:10,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792152929] [2023-02-15 21:37:10,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792152929] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:37:10,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119238766] [2023-02-15 21:37:10,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:37:10,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:10,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:37:10,027 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) [2023-02-15 21:37:10,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-15 21:37:10,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:37:10,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:37:10,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-15 21:37:10,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:37:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 13 proven. 20 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-15 21:37:10,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:37:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 21:37:11,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119238766] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:37:11,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:37:11,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 24] total 50 [2023-02-15 21:37:11,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390378497] [2023-02-15 21:37:11,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:37:11,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-15 21:37:11,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:37:11,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-15 21:37:11,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2265, Unknown=0, NotChecked=0, Total=2450 [2023-02-15 21:37:11,972 INFO L87 Difference]: Start difference. First operand 131 states and 182 transitions. Second operand has 50 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 39 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (21), 14 states have call predecessors, (21), 17 states have call successors, (21) [2023-02-15 21:37:12,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:37:12,534 INFO L93 Difference]: Finished difference Result 174 states and 240 transitions. [2023-02-15 21:37:12,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 21:37:12,535 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 39 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (21), 14 states have call predecessors, (21), 17 states have call successors, (21) Word has length 59 [2023-02-15 21:37:12,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:37:12,535 INFO L225 Difference]: With dead ends: 174 [2023-02-15 21:37:12,535 INFO L226 Difference]: Without dead ends: 170 [2023-02-15 21:37:12,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=417, Invalid=3489, Unknown=0, NotChecked=0, Total=3906 [2023-02-15 21:37:12,536 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 65 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:37:12,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 738 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:37:12,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-02-15 21:37:12,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 128. [2023-02-15 21:37:12,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 88 states have (on average 1.0681818181818181) internal successors, (94), 85 states have internal predecessors, (94), 11 states have call successors, (11), 4 states have call predecessors, (11), 28 states have return successors, (72), 38 states have call predecessors, (72), 11 states have call successors, (72) [2023-02-15 21:37:12,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 177 transitions. [2023-02-15 21:37:12,546 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 177 transitions. Word has length 59 [2023-02-15 21:37:12,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:37:12,546 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 177 transitions. [2023-02-15 21:37:12,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 39 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (21), 14 states have call predecessors, (21), 17 states have call successors, (21) [2023-02-15 21:37:12,546 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 177 transitions. [2023-02-15 21:37:12,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 21:37:12,547 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:37:12,547 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:37:12,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-15 21:37:12,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:12,749 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:37:12,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:37:12,749 INFO L85 PathProgramCache]: Analyzing trace with hash 547734810, now seen corresponding path program 15 times [2023-02-15 21:37:12,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:37:12,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331845262] [2023-02-15 21:37:12,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:37:12,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:37:12,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:12,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:37:12,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:12,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:12,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:12,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:12,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:37:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:12,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:13,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:13,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 21:37:13,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:37:13,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331845262] [2023-02-15 21:37:13,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331845262] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:37:13,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167240775] [2023-02-15 21:37:13,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:37:13,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:13,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:37:13,042 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) [2023-02-15 21:37:13,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-15 21:37:13,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 21:37:13,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:37:13,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-15 21:37:13,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:37:13,597 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 21:37:13,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:37:17,167 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 21:37:17,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167240775] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:37:17,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:37:17,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 22] total 46 [2023-02-15 21:37:17,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377778949] [2023-02-15 21:37:17,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:37:17,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-15 21:37:17,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:37:17,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-15 21:37:17,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1925, Unknown=1, NotChecked=0, Total=2070 [2023-02-15 21:37:17,170 INFO L87 Difference]: Start difference. First operand 128 states and 177 transitions. Second operand has 46 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 35 states have internal predecessors, (93), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (20), 14 states have call predecessors, (20), 17 states have call successors, (20) [2023-02-15 21:37:17,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:37:17,993 INFO L93 Difference]: Finished difference Result 177 states and 244 transitions. [2023-02-15 21:37:17,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 21:37:17,993 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 35 states have internal predecessors, (93), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (20), 14 states have call predecessors, (20), 17 states have call successors, (20) Word has length 59 [2023-02-15 21:37:17,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:37:17,994 INFO L225 Difference]: With dead ends: 177 [2023-02-15 21:37:17,994 INFO L226 Difference]: Without dead ends: 173 [2023-02-15 21:37:17,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 93 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=321, Invalid=3218, Unknown=1, NotChecked=0, Total=3540 [2023-02-15 21:37:17,995 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 49 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 21:37:17,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 650 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1287 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 21:37:17,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-02-15 21:37:18,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 128. [2023-02-15 21:37:18,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 88 states have (on average 1.0681818181818181) internal successors, (94), 85 states have internal predecessors, (94), 11 states have call successors, (11), 4 states have call predecessors, (11), 28 states have return successors, (72), 38 states have call predecessors, (72), 11 states have call successors, (72) [2023-02-15 21:37:18,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 177 transitions. [2023-02-15 21:37:18,019 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 177 transitions. Word has length 59 [2023-02-15 21:37:18,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:37:18,019 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 177 transitions. [2023-02-15 21:37:18,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 35 states have internal predecessors, (93), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (20), 14 states have call predecessors, (20), 17 states have call successors, (20) [2023-02-15 21:37:18,019 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 177 transitions. [2023-02-15 21:37:18,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-15 21:37:18,020 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:37:18,020 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:37:18,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-15 21:37:18,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-02-15 21:37:18,227 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:37:18,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:37:18,227 INFO L85 PathProgramCache]: Analyzing trace with hash 789094822, now seen corresponding path program 16 times [2023-02-15 21:37:18,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:37:18,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766683883] [2023-02-15 21:37:18,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:37:18,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:37:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:18,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:37:18,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:18,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:18,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:18,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:18,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:18,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:18,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 21:37:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:18,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:18,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:18,564 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 27 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-15 21:37:18,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:37:18,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766683883] [2023-02-15 21:37:18,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766683883] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:37:18,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206441278] [2023-02-15 21:37:18,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 21:37:18,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:18,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:37:18,570 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) [2023-02-15 21:37:18,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-15 21:37:18,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 21:37:18,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:37:18,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-15 21:37:18,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:37:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-15 21:37:19,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:37:21,501 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 63 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 21:37:21,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206441278] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:37:21,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:37:21,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 25] total 53 [2023-02-15 21:37:21,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108712597] [2023-02-15 21:37:21,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:37:21,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-15 21:37:21,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:37:21,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-15 21:37:21,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2588, Unknown=0, NotChecked=0, Total=2756 [2023-02-15 21:37:21,505 INFO L87 Difference]: Start difference. First operand 128 states and 177 transitions. Second operand has 53 states, 48 states have (on average 2.125) internal successors, (102), 38 states have internal predecessors, (102), 19 states have call successors, (21), 1 states have call predecessors, (21), 16 states have return successors, (24), 18 states have call predecessors, (24), 19 states have call successors, (24) [2023-02-15 21:37:22,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:37:22,629 INFO L93 Difference]: Finished difference Result 185 states and 250 transitions. [2023-02-15 21:37:22,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 21:37:22,631 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 48 states have (on average 2.125) internal successors, (102), 38 states have internal predecessors, (102), 19 states have call successors, (21), 1 states have call predecessors, (21), 16 states have return successors, (24), 18 states have call predecessors, (24), 19 states have call successors, (24) Word has length 67 [2023-02-15 21:37:22,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:37:22,632 INFO L225 Difference]: With dead ends: 185 [2023-02-15 21:37:22,632 INFO L226 Difference]: Without dead ends: 181 [2023-02-15 21:37:22,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=423, Invalid=4407, Unknown=0, NotChecked=0, Total=4830 [2023-02-15 21:37:22,633 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 57 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 1387 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 21:37:22,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 850 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1387 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 21:37:22,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-15 21:37:22,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 136. [2023-02-15 21:37:22,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 94 states have (on average 1.0638297872340425) internal successors, (100), 89 states have internal predecessors, (100), 11 states have call successors, (11), 4 states have call predecessors, (11), 30 states have return successors, (78), 42 states have call predecessors, (78), 11 states have call successors, (78) [2023-02-15 21:37:22,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 189 transitions. [2023-02-15 21:37:22,640 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 189 transitions. Word has length 67 [2023-02-15 21:37:22,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:37:22,644 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 189 transitions. [2023-02-15 21:37:22,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 48 states have (on average 2.125) internal successors, (102), 38 states have internal predecessors, (102), 19 states have call successors, (21), 1 states have call predecessors, (21), 16 states have return successors, (24), 18 states have call predecessors, (24), 19 states have call successors, (24) [2023-02-15 21:37:22,645 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 189 transitions. [2023-02-15 21:37:22,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-15 21:37:22,645 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:37:22,645 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:37:22,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-15 21:37:22,851 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,SelfDestructingSolverStorable32 [2023-02-15 21:37:22,852 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:37:22,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:37:22,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1906616390, now seen corresponding path program 17 times [2023-02-15 21:37:22,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:37:22,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659407779] [2023-02-15 21:37:22,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:37:22,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:37:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:22,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:37:22,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:23,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:23,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:23,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:23,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:23,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:23,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:23,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 21:37:23,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:23,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:23,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:23,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:23,385 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-15 21:37:23,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:37:23,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659407779] [2023-02-15 21:37:23,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659407779] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:37:23,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425806900] [2023-02-15 21:37:23,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 21:37:23,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:23,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:37:23,387 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) [2023-02-15 21:37:23,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-15 21:37:23,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-15 21:37:23,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:37:23,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-15 21:37:23,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:37:23,959 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-15 21:37:23,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:37:25,558 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 21:37:25,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425806900] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:37:25,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:37:25,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 26] total 44 [2023-02-15 21:37:25,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323125370] [2023-02-15 21:37:25,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:37:25,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-15 21:37:25,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:37:25,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-15 21:37:25,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1720, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 21:37:25,561 INFO L87 Difference]: Start difference. First operand 136 states and 189 transitions. Second operand has 44 states, 38 states have (on average 2.289473684210526) internal successors, (87), 34 states have internal predecessors, (87), 17 states have call successors, (19), 1 states have call predecessors, (19), 10 states have return successors, (23), 13 states have call predecessors, (23), 17 states have call successors, (23) [2023-02-15 21:37:26,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:37:26,221 INFO L93 Difference]: Finished difference Result 208 states and 292 transitions. [2023-02-15 21:37:26,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 21:37:26,221 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 38 states have (on average 2.289473684210526) internal successors, (87), 34 states have internal predecessors, (87), 17 states have call successors, (19), 1 states have call predecessors, (19), 10 states have return successors, (23), 13 states have call predecessors, (23), 17 states have call successors, (23) Word has length 67 [2023-02-15 21:37:26,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:37:26,222 INFO L225 Difference]: With dead ends: 208 [2023-02-15 21:37:26,222 INFO L226 Difference]: Without dead ends: 204 [2023-02-15 21:37:26,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 111 SyntacticMatches, 14 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=364, Invalid=2716, Unknown=0, NotChecked=0, Total=3080 [2023-02-15 21:37:26,223 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 34 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 21:37:26,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 515 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 21:37:26,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-02-15 21:37:26,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 136. [2023-02-15 21:37:26,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 94 states have (on average 1.0638297872340425) internal successors, (100), 88 states have internal predecessors, (100), 12 states have call successors, (12), 4 states have call predecessors, (12), 29 states have return successors, (75), 43 states have call predecessors, (75), 12 states have call successors, (75) [2023-02-15 21:37:26,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 187 transitions. [2023-02-15 21:37:26,232 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 187 transitions. Word has length 67 [2023-02-15 21:37:26,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:37:26,233 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 187 transitions. [2023-02-15 21:37:26,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 38 states have (on average 2.289473684210526) internal successors, (87), 34 states have internal predecessors, (87), 17 states have call successors, (19), 1 states have call predecessors, (19), 10 states have return successors, (23), 13 states have call predecessors, (23), 17 states have call successors, (23) [2023-02-15 21:37:26,233 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 187 transitions. [2023-02-15 21:37:26,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-15 21:37:26,234 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:37:26,234 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:37:26,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-15 21:37:26,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:26,439 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:37:26,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:37:26,440 INFO L85 PathProgramCache]: Analyzing trace with hash 559475846, now seen corresponding path program 18 times [2023-02-15 21:37:26,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:37:26,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824456223] [2023-02-15 21:37:26,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:37:26,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:37:26,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:26,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:37:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:26,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:26,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:26,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:26,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:26,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:26,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 21:37:26,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:26,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:26,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:26,895 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 21:37:26,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:37:26,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824456223] [2023-02-15 21:37:26,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824456223] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:37:26,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212234474] [2023-02-15 21:37:26,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 21:37:26,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:26,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:37:26,897 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) [2023-02-15 21:37:26,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-15 21:37:27,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-15 21:37:27,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:37:27,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-15 21:37:27,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:37:27,525 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 21:37:27,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:37:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 6 proven. 58 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 21:37:29,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212234474] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:37:29,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:37:29,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 27] total 49 [2023-02-15 21:37:29,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770265230] [2023-02-15 21:37:29,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:37:29,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-15 21:37:29,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:37:29,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-15 21:37:29,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2182, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 21:37:29,380 INFO L87 Difference]: Start difference. First operand 136 states and 187 transitions. Second operand has 49 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 38 states have internal predecessors, (92), 18 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (22), 14 states have call predecessors, (22), 18 states have call successors, (22) [2023-02-15 21:37:30,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:37:30,169 INFO L93 Difference]: Finished difference Result 232 states and 330 transitions. [2023-02-15 21:37:30,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 21:37:30,169 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 38 states have internal predecessors, (92), 18 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (22), 14 states have call predecessors, (22), 18 states have call successors, (22) Word has length 67 [2023-02-15 21:37:30,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:37:30,170 INFO L225 Difference]: With dead ends: 232 [2023-02-15 21:37:30,171 INFO L226 Difference]: Without dead ends: 228 [2023-02-15 21:37:30,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 103 SyntacticMatches, 17 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=415, Invalid=3491, Unknown=0, NotChecked=0, Total=3906 [2023-02-15 21:37:30,172 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 53 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 1218 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 21:37:30,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 768 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1218 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 21:37:30,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-02-15 21:37:30,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 143. [2023-02-15 21:37:30,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 99 states have (on average 1.0606060606060606) internal successors, (105), 92 states have internal predecessors, (105), 12 states have call successors, (12), 4 states have call predecessors, (12), 31 states have return successors, (81), 46 states have call predecessors, (81), 12 states have call successors, (81) [2023-02-15 21:37:30,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 198 transitions. [2023-02-15 21:37:30,200 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 198 transitions. Word has length 67 [2023-02-15 21:37:30,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:37:30,200 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 198 transitions. [2023-02-15 21:37:30,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 38 states have internal predecessors, (92), 18 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (22), 14 states have call predecessors, (22), 18 states have call successors, (22) [2023-02-15 21:37:30,200 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 198 transitions. [2023-02-15 21:37:30,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-15 21:37:30,201 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:37:30,201 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:37:30,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-15 21:37:30,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:30,407 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:37:30,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:37:30,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1155297274, now seen corresponding path program 19 times [2023-02-15 21:37:30,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:37:30,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831458664] [2023-02-15 21:37:30,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:37:30,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:37:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:30,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:37:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:30,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:30,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:30,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:30,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:30,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:30,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 21:37:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:30,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:30,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:30,779 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-15 21:37:30,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:37:30,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831458664] [2023-02-15 21:37:30,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831458664] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:37:30,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116434336] [2023-02-15 21:37:30,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 21:37:30,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:30,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:37:30,781 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) [2023-02-15 21:37:30,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-15 21:37:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:31,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-15 21:37:31,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:37:31,488 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-15 21:37:31,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:37:33,991 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 60 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 21:37:33,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116434336] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:37:33,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:37:33,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 27] total 53 [2023-02-15 21:37:33,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247009115] [2023-02-15 21:37:33,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:37:33,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-15 21:37:33,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:37:33,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-15 21:37:33,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2554, Unknown=0, NotChecked=0, Total=2756 [2023-02-15 21:37:33,994 INFO L87 Difference]: Start difference. First operand 143 states and 198 transitions. Second operand has 53 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 40 states have internal predecessors, (98), 18 states have call successors, (20), 1 states have call predecessors, (20), 13 states have return successors, (24), 16 states have call predecessors, (24), 18 states have call successors, (24) [2023-02-15 21:37:34,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:37:34,868 INFO L93 Difference]: Finished difference Result 223 states and 318 transitions. [2023-02-15 21:37:34,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 21:37:34,868 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 40 states have internal predecessors, (98), 18 states have call successors, (20), 1 states have call predecessors, (20), 13 states have return successors, (24), 16 states have call predecessors, (24), 18 states have call successors, (24) Word has length 67 [2023-02-15 21:37:34,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:37:34,869 INFO L225 Difference]: With dead ends: 223 [2023-02-15 21:37:34,869 INFO L226 Difference]: Without dead ends: 219 [2023-02-15 21:37:34,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 105 SyntacticMatches, 10 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=508, Invalid=4048, Unknown=0, NotChecked=0, Total=4556 [2023-02-15 21:37:34,870 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 83 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 21:37:34,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 641 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 21:37:34,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-02-15 21:37:34,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 128. [2023-02-15 21:37:34,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 88 states have (on average 1.0681818181818181) internal successors, (94), 84 states have internal predecessors, (94), 12 states have call successors, (12), 4 states have call predecessors, (12), 27 states have return successors, (69), 39 states have call predecessors, (69), 12 states have call successors, (69) [2023-02-15 21:37:34,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 175 transitions. [2023-02-15 21:37:34,881 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 175 transitions. Word has length 67 [2023-02-15 21:37:34,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:37:34,882 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 175 transitions. [2023-02-15 21:37:34,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 40 states have internal predecessors, (98), 18 states have call successors, (20), 1 states have call predecessors, (20), 13 states have return successors, (24), 16 states have call predecessors, (24), 18 states have call successors, (24) [2023-02-15 21:37:34,882 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 175 transitions. [2023-02-15 21:37:34,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-15 21:37:34,883 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:37:34,883 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:37:34,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-15 21:37:35,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:35,090 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:37:35,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:37:35,090 INFO L85 PathProgramCache]: Analyzing trace with hash -37775706, now seen corresponding path program 20 times [2023-02-15 21:37:35,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:37:35,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446145520] [2023-02-15 21:37:35,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:37:35,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:37:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:35,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:37:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:35,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:35,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:35,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:35,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:35,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:35,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:35,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:35,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:35,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 21:37:35,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:35,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:35,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-15 21:37:35,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:37:35,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446145520] [2023-02-15 21:37:35,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446145520] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:37:35,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634567461] [2023-02-15 21:37:35,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:37:35,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:35,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:37:35,490 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) [2023-02-15 21:37:35,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-15 21:37:35,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:37:35,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:37:35,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-15 21:37:35,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:37:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-15 21:37:36,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:37:37,729 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 21:37:37,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634567461] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:37:37,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:37:37,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 26] total 42 [2023-02-15 21:37:37,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774977745] [2023-02-15 21:37:37,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:37:37,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-15 21:37:37,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:37:37,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-15 21:37:37,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1562, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 21:37:37,732 INFO L87 Difference]: Start difference. First operand 128 states and 175 transitions. Second operand has 42 states, 37 states have (on average 2.324324324324324) internal successors, (86), 33 states have internal predecessors, (86), 17 states have call successors, (18), 1 states have call predecessors, (18), 10 states have return successors, (21), 12 states have call predecessors, (21), 17 states have call successors, (21) [2023-02-15 21:37:38,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:37:38,329 INFO L93 Difference]: Finished difference Result 172 states and 239 transitions. [2023-02-15 21:37:38,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 21:37:38,329 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 2.324324324324324) internal successors, (86), 33 states have internal predecessors, (86), 17 states have call successors, (18), 1 states have call predecessors, (18), 10 states have return successors, (21), 12 states have call predecessors, (21), 17 states have call successors, (21) Word has length 67 [2023-02-15 21:37:38,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:37:38,330 INFO L225 Difference]: With dead ends: 172 [2023-02-15 21:37:38,330 INFO L226 Difference]: Without dead ends: 168 [2023-02-15 21:37:38,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 108 SyntacticMatches, 19 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=368, Invalid=2602, Unknown=0, NotChecked=0, Total=2970 [2023-02-15 21:37:38,331 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 50 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 21:37:38,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 663 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 21:37:38,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-15 21:37:38,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 115. [2023-02-15 21:37:38,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 77 states have internal predecessors, (85), 11 states have call successors, (11), 4 states have call predecessors, (11), 24 states have return successors, (60), 33 states have call predecessors, (60), 11 states have call successors, (60) [2023-02-15 21:37:38,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 156 transitions. [2023-02-15 21:37:38,340 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 156 transitions. Word has length 67 [2023-02-15 21:37:38,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:37:38,340 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 156 transitions. [2023-02-15 21:37:38,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 2.324324324324324) internal successors, (86), 33 states have internal predecessors, (86), 17 states have call successors, (18), 1 states have call predecessors, (18), 10 states have return successors, (21), 12 states have call predecessors, (21), 17 states have call successors, (21) [2023-02-15 21:37:38,341 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 156 transitions. [2023-02-15 21:37:38,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-15 21:37:38,341 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:37:38,342 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:37:38,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-02-15 21:37:38,567 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,SelfDestructingSolverStorable36 [2023-02-15 21:37:38,568 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:37:38,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:37:38,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1331044026, now seen corresponding path program 21 times [2023-02-15 21:37:38,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:37:38,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786055136] [2023-02-15 21:37:38,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:37:38,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:37:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:38,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:37:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:38,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:38,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:38,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:38,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:38,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:38,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:38,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:38,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:39,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-15 21:37:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:39,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:39,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:39,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 14 proven. 59 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-15 21:37:39,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:37:39,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786055136] [2023-02-15 21:37:39,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786055136] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:37:39,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915391066] [2023-02-15 21:37:39,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:37:39,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:39,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:37:39,118 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) [2023-02-15 21:37:39,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-15 21:37:39,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-15 21:37:39,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:37:39,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-15 21:37:39,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:37:39,743 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 31 proven. 35 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-15 21:37:39,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:37:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 13 proven. 69 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 21:37:41,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915391066] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:37:41,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:37:41,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20, 24] total 52 [2023-02-15 21:37:41,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493975755] [2023-02-15 21:37:41,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:37:41,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-15 21:37:41,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:37:41,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-15 21:37:41,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2477, Unknown=0, NotChecked=0, Total=2652 [2023-02-15 21:37:41,871 INFO L87 Difference]: Start difference. First operand 115 states and 156 transitions. Second operand has 52 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 38 states have internal predecessors, (102), 19 states have call successors, (22), 1 states have call predecessors, (22), 13 states have return successors, (27), 17 states have call predecessors, (27), 19 states have call successors, (27) [2023-02-15 21:37:43,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:37:43,490 INFO L93 Difference]: Finished difference Result 284 states and 399 transitions. [2023-02-15 21:37:43,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-15 21:37:43,490 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 38 states have internal predecessors, (102), 19 states have call successors, (22), 1 states have call predecessors, (22), 13 states have return successors, (27), 17 states have call predecessors, (27), 19 states have call successors, (27) Word has length 75 [2023-02-15 21:37:43,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:37:43,491 INFO L225 Difference]: With dead ends: 284 [2023-02-15 21:37:43,491 INFO L226 Difference]: Without dead ends: 280 [2023-02-15 21:37:43,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 121 SyntacticMatches, 16 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=821, Invalid=5499, Unknown=0, NotChecked=0, Total=6320 [2023-02-15 21:37:43,492 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 49 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 1922 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 1961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 21:37:43,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 856 Invalid, 1961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1922 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 21:37:43,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2023-02-15 21:37:43,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 100. [2023-02-15 21:37:43,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 states have internal predecessors, (75), 10 states have call successors, (10), 4 states have call predecessors, (10), 20 states have return successors, (47), 27 states have call predecessors, (47), 10 states have call successors, (47) [2023-02-15 21:37:43,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 132 transitions. [2023-02-15 21:37:43,501 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 132 transitions. Word has length 75 [2023-02-15 21:37:43,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:37:43,501 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 132 transitions. [2023-02-15 21:37:43,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 38 states have internal predecessors, (102), 19 states have call successors, (22), 1 states have call predecessors, (22), 13 states have return successors, (27), 17 states have call predecessors, (27), 19 states have call successors, (27) [2023-02-15 21:37:43,502 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 132 transitions. [2023-02-15 21:37:43,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-15 21:37:43,502 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:37:43,502 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:37:43,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-15 21:37:43,708 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,SelfDestructingSolverStorable37 [2023-02-15 21:37:43,708 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:37:43,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:37:43,709 INFO L85 PathProgramCache]: Analyzing trace with hash 225391458, now seen corresponding path program 22 times [2023-02-15 21:37:43,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:37:43,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972422843] [2023-02-15 21:37:43,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:37:43,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:37:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:43,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:37:43,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:43,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:43,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:43,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:43,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:44,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:44,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:44,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-15 21:37:44,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:44,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:44,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:44,297 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-02-15 21:37:44,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:37:44,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972422843] [2023-02-15 21:37:44,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972422843] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:37:44,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314598182] [2023-02-15 21:37:44,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 21:37:44,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:44,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:37:44,300 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) [2023-02-15 21:37:44,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-15 21:37:44,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 21:37:44,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:37:44,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-15 21:37:44,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:37:45,248 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-15 21:37:45,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:37:47,718 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 15 proven. 67 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 21:37:47,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314598182] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:37:47,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:37:47,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 29] total 62 [2023-02-15 21:37:47,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135774275] [2023-02-15 21:37:47,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:37:47,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-15 21:37:47,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:37:47,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-15 21:37:47,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=3527, Unknown=0, NotChecked=0, Total=3782 [2023-02-15 21:37:47,721 INFO L87 Difference]: Start difference. First operand 100 states and 132 transitions. Second operand has 62 states, 52 states have (on average 2.019230769230769) internal successors, (105), 47 states have internal predecessors, (105), 20 states have call successors, (22), 1 states have call predecessors, (22), 14 states have return successors, (24), 17 states have call predecessors, (24), 20 states have call successors, (24) [2023-02-15 21:37:48,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:37:48,967 INFO L93 Difference]: Finished difference Result 201 states and 277 transitions. [2023-02-15 21:37:48,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-15 21:37:48,968 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 52 states have (on average 2.019230769230769) internal successors, (105), 47 states have internal predecessors, (105), 20 states have call successors, (22), 1 states have call predecessors, (22), 14 states have return successors, (24), 17 states have call predecessors, (24), 20 states have call successors, (24) Word has length 68 [2023-02-15 21:37:48,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:37:48,969 INFO L225 Difference]: With dead ends: 201 [2023-02-15 21:37:48,969 INFO L226 Difference]: Without dead ends: 197 [2023-02-15 21:37:48,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 102 SyntacticMatches, 9 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1692 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=845, Invalid=5961, Unknown=0, NotChecked=0, Total=6806 [2023-02-15 21:37:48,970 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 87 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 1409 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 1487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 21:37:48,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 721 Invalid, 1487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1409 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 21:37:48,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-02-15 21:37:48,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 63. [2023-02-15 21:37:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 45 states have internal predecessors, (50), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (16), 13 states have call predecessors, (16), 9 states have call successors, (16) [2023-02-15 21:37:48,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2023-02-15 21:37:48,980 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 68 [2023-02-15 21:37:48,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:37:48,981 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2023-02-15 21:37:48,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 52 states have (on average 2.019230769230769) internal successors, (105), 47 states have internal predecessors, (105), 20 states have call successors, (22), 1 states have call predecessors, (22), 14 states have return successors, (24), 17 states have call predecessors, (24), 20 states have call successors, (24) [2023-02-15 21:37:48,981 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2023-02-15 21:37:48,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-15 21:37:48,981 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:37:48,982 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:37:49,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-15 21:37:49,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-02-15 21:37:49,188 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:37:49,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:37:49,189 INFO L85 PathProgramCache]: Analyzing trace with hash -835098444, now seen corresponding path program 6 times [2023-02-15 21:37:49,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:37:49,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498067938] [2023-02-15 21:37:49,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:37:49,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:37:49,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:49,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:37:49,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:49,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:49,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:49,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 21:37:49,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:49,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:49,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:49,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:49,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:49,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:49,514 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 21:37:49,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:37:49,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498067938] [2023-02-15 21:37:49,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498067938] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:37:49,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674992973] [2023-02-15 21:37:49,515 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 21:37:49,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:49,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:37:49,516 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) [2023-02-15 21:37:49,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-15 21:37:49,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-15 21:37:49,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:37:49,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-15 21:37:49,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:37:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 21:37:50,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:37:51,331 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 21:37:51,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674992973] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:37:51,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:37:51,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 21] total 40 [2023-02-15 21:37:51,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693984518] [2023-02-15 21:37:51,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:37:51,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-15 21:37:51,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:37:51,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-15 21:37:51,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1429, Unknown=0, NotChecked=0, Total=1560 [2023-02-15 21:37:51,333 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 40 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 16 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (19), 11 states have call predecessors, (19), 16 states have call successors, (19) [2023-02-15 21:37:51,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:37:51,693 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2023-02-15 21:37:51,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 21:37:51,694 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 16 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (19), 11 states have call predecessors, (19), 16 states have call successors, (19) Word has length 58 [2023-02-15 21:37:51,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:37:51,694 INFO L225 Difference]: With dead ends: 85 [2023-02-15 21:37:51,694 INFO L226 Difference]: Without dead ends: 76 [2023-02-15 21:37:51,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 93 SyntacticMatches, 12 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=271, Invalid=2179, Unknown=0, NotChecked=0, Total=2450 [2023-02-15 21:37:51,695 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 32 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:37:51,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 398 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:37:51,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-15 21:37:51,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2023-02-15 21:37:51,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 47 states have internal predecessors, (52), 9 states have call successors, (9), 4 states have call predecessors, (9), 10 states have return successors, (18), 14 states have call predecessors, (18), 9 states have call successors, (18) [2023-02-15 21:37:51,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2023-02-15 21:37:51,724 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 58 [2023-02-15 21:37:51,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:37:51,724 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2023-02-15 21:37:51,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 16 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (19), 11 states have call predecessors, (19), 16 states have call successors, (19) [2023-02-15 21:37:51,725 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2023-02-15 21:37:51,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-15 21:37:51,725 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:37:51,726 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:37:51,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-02-15 21:37:51,926 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,SelfDestructingSolverStorable39 [2023-02-15 21:37:51,926 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:37:51,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:37:51,927 INFO L85 PathProgramCache]: Analyzing trace with hash -551668204, now seen corresponding path program 23 times [2023-02-15 21:37:51,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:37:51,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526844768] [2023-02-15 21:37:51,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:37:51,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:37:51,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:52,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:37:52,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:52,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:52,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:52,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:52,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 21:37:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:52,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:52,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:52,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:52,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:52,299 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 21:37:52,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:37:52,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526844768] [2023-02-15 21:37:52,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526844768] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:37:52,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181369834] [2023-02-15 21:37:52,299 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 21:37:52,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:52,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:37:52,301 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) [2023-02-15 21:37:52,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-15 21:37:52,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-15 21:37:52,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:37:52,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-15 21:37:52,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:37:52,966 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 21:37:52,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:37:54,091 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 21:37:54,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181369834] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:37:54,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:37:54,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 21] total 40 [2023-02-15 21:37:54,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091426038] [2023-02-15 21:37:54,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:37:54,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-15 21:37:54,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:37:54,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-15 21:37:54,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1429, Unknown=0, NotChecked=0, Total=1560 [2023-02-15 21:37:54,092 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 40 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 16 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (19), 11 states have call predecessors, (19), 16 states have call successors, (19) [2023-02-15 21:37:54,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:37:54,566 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2023-02-15 21:37:54,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 21:37:54,566 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 16 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (19), 11 states have call predecessors, (19), 16 states have call successors, (19) Word has length 58 [2023-02-15 21:37:54,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:37:54,567 INFO L225 Difference]: With dead ends: 89 [2023-02-15 21:37:54,567 INFO L226 Difference]: Without dead ends: 80 [2023-02-15 21:37:54,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 92 SyntacticMatches, 13 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=271, Invalid=2179, Unknown=0, NotChecked=0, Total=2450 [2023-02-15 21:37:54,568 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 41 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:37:54,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 425 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:37:54,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-15 21:37:54,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2023-02-15 21:37:54,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.125) internal successors, (54), 49 states have internal predecessors, (54), 9 states have call successors, (9), 4 states have call predecessors, (9), 11 states have return successors, (20), 15 states have call predecessors, (20), 9 states have call successors, (20) [2023-02-15 21:37:54,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2023-02-15 21:37:54,571 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 58 [2023-02-15 21:37:54,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:37:54,571 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2023-02-15 21:37:54,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 16 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (19), 11 states have call predecessors, (19), 16 states have call successors, (19) [2023-02-15 21:37:54,571 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2023-02-15 21:37:54,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-15 21:37:54,572 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:37:54,572 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:37:54,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-02-15 21:37:54,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:54,772 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:37:54,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:37:54,773 INFO L85 PathProgramCache]: Analyzing trace with hash 590358656, now seen corresponding path program 24 times [2023-02-15 21:37:54,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:37:54,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616478984] [2023-02-15 21:37:54,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:37:54,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:37:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:54,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:37:54,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:54,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:54,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:54,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:55,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:37:55,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:55,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:55,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:55,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:55,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:55,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-15 21:37:55,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:37:55,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616478984] [2023-02-15 21:37:55,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616478984] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:37:55,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178410823] [2023-02-15 21:37:55,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 21:37:55,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:55,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:37:55,185 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) [2023-02-15 21:37:55,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-15 21:37:55,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-15 21:37:55,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:37:55,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-15 21:37:55,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:37:55,950 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-15 21:37:55,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:37:57,159 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-15 21:37:57,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178410823] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:37:57,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:37:57,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 22] total 42 [2023-02-15 21:37:57,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449965338] [2023-02-15 21:37:57,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:37:57,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-15 21:37:57,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:37:57,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-15 21:37:57,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1586, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 21:37:57,161 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 42 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 33 states have internal predecessors, (87), 16 states have call successors, (19), 1 states have call predecessors, (19), 11 states have return successors, (22), 13 states have call predecessors, (22), 16 states have call successors, (22) [2023-02-15 21:37:57,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:37:57,621 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2023-02-15 21:37:57,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 21:37:57,622 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 33 states have internal predecessors, (87), 16 states have call successors, (19), 1 states have call predecessors, (19), 11 states have return successors, (22), 13 states have call predecessors, (22), 16 states have call successors, (22) Word has length 66 [2023-02-15 21:37:57,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:37:57,623 INFO L225 Difference]: With dead ends: 90 [2023-02-15 21:37:57,623 INFO L226 Difference]: Without dead ends: 81 [2023-02-15 21:37:57,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 108 SyntacticMatches, 15 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=287, Invalid=2469, Unknown=0, NotChecked=0, Total=2756 [2023-02-15 21:37:57,624 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 50 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:37:57,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 495 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:37:57,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-15 21:37:57,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2023-02-15 21:37:57,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 51 states have internal predecessors, (55), 9 states have call successors, (9), 4 states have call predecessors, (9), 12 states have return successors, (22), 15 states have call predecessors, (22), 9 states have call successors, (22) [2023-02-15 21:37:57,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2023-02-15 21:37:57,628 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 66 [2023-02-15 21:37:57,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:37:57,628 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2023-02-15 21:37:57,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 33 states have internal predecessors, (87), 16 states have call successors, (19), 1 states have call predecessors, (19), 11 states have return successors, (22), 13 states have call predecessors, (22), 16 states have call successors, (22) [2023-02-15 21:37:57,629 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2023-02-15 21:37:57,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-15 21:37:57,629 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:37:57,629 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:37:57,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-02-15 21:37:57,840 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,SelfDestructingSolverStorable41 [2023-02-15 21:37:57,841 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:37:57,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:37:57,841 INFO L85 PathProgramCache]: Analyzing trace with hash 720804832, now seen corresponding path program 7 times [2023-02-15 21:37:57,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:37:57,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668692654] [2023-02-15 21:37:57,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:37:57,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:37:57,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:57,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:37:57,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:57,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:58,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:58,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:58,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:37:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:58,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:37:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:58,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:58,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:58,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:58,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-02-15 21:37:58,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:37:58,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668692654] [2023-02-15 21:37:58,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668692654] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:37:58,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999111940] [2023-02-15 21:37:58,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 21:37:58,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:58,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:37:58,206 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) [2023-02-15 21:37:58,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-02-15 21:37:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:58,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-15 21:37:58,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:37:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-02-15 21:37:58,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:38:00,065 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 21:38:00,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999111940] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:38:00,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:38:00,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 23] total 34 [2023-02-15 21:38:00,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956909725] [2023-02-15 21:38:00,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:38:00,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 21:38:00,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:38:00,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 21:38:00,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1024, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 21:38:00,088 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 28 states have internal predecessors, (81), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (20), 10 states have call predecessors, (20), 14 states have call successors, (20) [2023-02-15 21:38:00,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:38:00,407 INFO L93 Difference]: Finished difference Result 101 states and 125 transitions. [2023-02-15 21:38:00,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 21:38:00,407 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 28 states have internal predecessors, (81), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (20), 10 states have call predecessors, (20), 14 states have call successors, (20) Word has length 66 [2023-02-15 21:38:00,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:38:00,408 INFO L225 Difference]: With dead ends: 101 [2023-02-15 21:38:00,408 INFO L226 Difference]: Without dead ends: 97 [2023-02-15 21:38:00,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 113 SyntacticMatches, 16 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=1764, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 21:38:00,413 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 97 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:38:00,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 525 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:38:00,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-15 21:38:00,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 82. [2023-02-15 21:38:00,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 58 states have internal predecessors, (62), 10 states have call successors, (10), 4 states have call predecessors, (10), 15 states have return successors, (29), 19 states have call predecessors, (29), 10 states have call successors, (29) [2023-02-15 21:38:00,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2023-02-15 21:38:00,424 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 66 [2023-02-15 21:38:00,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:38:00,426 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2023-02-15 21:38:00,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 28 states have internal predecessors, (81), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (20), 10 states have call predecessors, (20), 14 states have call successors, (20) [2023-02-15 21:38:00,426 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2023-02-15 21:38:00,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-15 21:38:00,427 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:38:00,427 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:38:00,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-02-15 21:38:00,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:38:00,634 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:38:00,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:38:00,635 INFO L85 PathProgramCache]: Analyzing trace with hash 485380736, now seen corresponding path program 25 times [2023-02-15 21:38:00,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:38:00,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279339158] [2023-02-15 21:38:00,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:38:00,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:38:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:00,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:38:00,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:00,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:38:00,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:00,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:38:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:00,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:38:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:00,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:38:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:01,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:01,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:01,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:01,121 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-15 21:38:01,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:38:01,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279339158] [2023-02-15 21:38:01,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279339158] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:38:01,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489394349] [2023-02-15 21:38:01,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 21:38:01,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:38:01,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:38:01,123 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) [2023-02-15 21:38:01,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-02-15 21:38:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:01,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-15 21:38:01,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:38:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-15 21:38:02,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:38:39,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489394349] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:38:39,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:38:39,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2023-02-15 21:38:39,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635888782] [2023-02-15 21:38:39,411 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:38:39,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-15 21:38:39,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:38:39,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-15 21:38:39,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=2351, Unknown=13, NotChecked=0, Total=2550 [2023-02-15 21:38:39,412 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 35 states, 30 states have (on average 2.033333333333333) internal successors, (61), 27 states have internal predecessors, (61), 11 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (16), 12 states have call predecessors, (16), 11 states have call successors, (16) [2023-02-15 21:38:40,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:38:40,037 INFO L93 Difference]: Finished difference Result 130 states and 167 transitions. [2023-02-15 21:38:40,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 21:38:40,038 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 30 states have (on average 2.033333333333333) internal successors, (61), 27 states have internal predecessors, (61), 11 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (16), 12 states have call predecessors, (16), 11 states have call successors, (16) Word has length 66 [2023-02-15 21:38:40,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:38:40,038 INFO L225 Difference]: With dead ends: 130 [2023-02-15 21:38:40,038 INFO L226 Difference]: Without dead ends: 126 [2023-02-15 21:38:40,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 36.4s TimeCoverageRelationStatistics Valid=346, Invalid=3423, Unknown=13, NotChecked=0, Total=3782 [2023-02-15 21:38:40,039 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 34 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:38:40,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 513 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:38:40,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-02-15 21:38:40,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 95. [2023-02-15 21:38:40,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 66 states have internal predecessors, (71), 10 states have call successors, (10), 4 states have call predecessors, (10), 19 states have return successors, (40), 24 states have call predecessors, (40), 10 states have call successors, (40) [2023-02-15 21:38:40,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 121 transitions. [2023-02-15 21:38:40,044 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 121 transitions. Word has length 66 [2023-02-15 21:38:40,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:38:40,044 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 121 transitions. [2023-02-15 21:38:40,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 30 states have (on average 2.033333333333333) internal successors, (61), 27 states have internal predecessors, (61), 11 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (16), 12 states have call predecessors, (16), 11 states have call successors, (16) [2023-02-15 21:38:40,044 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 121 transitions. [2023-02-15 21:38:40,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-15 21:38:40,054 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:38:40,054 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:38:40,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-02-15 21:38:40,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:38:40,255 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:38:40,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:38:40,255 INFO L85 PathProgramCache]: Analyzing trace with hash 354934560, now seen corresponding path program 26 times [2023-02-15 21:38:40,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:38:40,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084098719] [2023-02-15 21:38:40,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:38:40,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:38:40,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:40,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:38:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:40,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:38:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:40,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:38:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:40,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:38:40,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:40,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:38:40,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:40,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:40,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:40,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:40,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:40,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:40,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:40,653 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-15 21:38:40,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:38:40,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084098719] [2023-02-15 21:38:40,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084098719] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:38:40,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662492536] [2023-02-15 21:38:40,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:38:40,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:38:40,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:38:40,663 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) [2023-02-15 21:38:40,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-02-15 21:38:41,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:38:41,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:38:41,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 73 conjunts are in the unsatisfiable core [2023-02-15 21:38:41,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:38:41,340 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 11 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 21:38:41,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:38:42,285 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-15 21:38:42,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662492536] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:38:42,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:38:42,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 21] total 33 [2023-02-15 21:38:42,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845779815] [2023-02-15 21:38:42,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:38:42,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 21:38:42,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:38:42,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 21:38:42,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 21:38:42,287 INFO L87 Difference]: Start difference. First operand 95 states and 121 transitions. Second operand has 33 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 28 states have internal predecessors, (74), 11 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (20), 12 states have call predecessors, (20), 11 states have call successors, (20) [2023-02-15 21:38:42,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:38:42,841 INFO L93 Difference]: Finished difference Result 117 states and 151 transitions. [2023-02-15 21:38:42,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 21:38:42,841 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 28 states have internal predecessors, (74), 11 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (20), 12 states have call predecessors, (20), 11 states have call successors, (20) Word has length 66 [2023-02-15 21:38:42,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:38:42,842 INFO L225 Difference]: With dead ends: 117 [2023-02-15 21:38:42,842 INFO L226 Difference]: Without dead ends: 108 [2023-02-15 21:38:42,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 111 SyntacticMatches, 21 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=240, Invalid=1740, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 21:38:42,843 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:38:42,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 447 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:38:42,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-02-15 21:38:42,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 96. [2023-02-15 21:38:42,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 66 states have internal predecessors, (72), 10 states have call successors, (10), 4 states have call predecessors, (10), 19 states have return successors, (40), 25 states have call predecessors, (40), 10 states have call successors, (40) [2023-02-15 21:38:42,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 122 transitions. [2023-02-15 21:38:42,848 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 122 transitions. Word has length 66 [2023-02-15 21:38:42,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:38:42,848 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 122 transitions. [2023-02-15 21:38:42,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 28 states have internal predecessors, (74), 11 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (20), 12 states have call predecessors, (20), 11 states have call successors, (20) [2023-02-15 21:38:42,848 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 122 transitions. [2023-02-15 21:38:42,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-15 21:38:42,849 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:38:42,849 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:38:42,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-02-15 21:38:43,055 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,SelfDestructingSolverStorable44 [2023-02-15 21:38:43,055 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:38:43,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:38:43,056 INFO L85 PathProgramCache]: Analyzing trace with hash 959666752, now seen corresponding path program 27 times [2023-02-15 21:38:43,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:38:43,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511659900] [2023-02-15 21:38:43,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:38:43,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:38:43,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:43,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:38:43,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:43,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:38:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:43,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:38:43,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:43,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:38:43,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:43,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:38:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:43,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:43,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:43,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:43,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:43,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-15 21:38:43,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:38:43,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511659900] [2023-02-15 21:38:43,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511659900] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:38:43,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455135222] [2023-02-15 21:38:43,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:38:43,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:38:43,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:38:43,405 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) [2023-02-15 21:38:43,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-02-15 21:38:43,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 21:38:43,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:38:43,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-15 21:38:43,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:38:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 21:38:44,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:38:45,909 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 21:38:45,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455135222] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:38:45,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:38:45,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 24] total 48 [2023-02-15 21:38:45,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962171812] [2023-02-15 21:38:45,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:38:45,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-15 21:38:45,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:38:45,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-15 21:38:45,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2107, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 21:38:45,912 INFO L87 Difference]: Start difference. First operand 96 states and 122 transitions. Second operand has 48 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 37 states have internal predecessors, (98), 17 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (23), 15 states have call predecessors, (23), 17 states have call successors, (23) [2023-02-15 21:38:46,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:38:46,400 INFO L93 Difference]: Finished difference Result 136 states and 178 transitions. [2023-02-15 21:38:46,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 21:38:46,400 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 37 states have internal predecessors, (98), 17 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (23), 15 states have call predecessors, (23), 17 states have call successors, (23) Word has length 66 [2023-02-15 21:38:46,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:38:46,401 INFO L225 Difference]: With dead ends: 136 [2023-02-15 21:38:46,401 INFO L226 Difference]: Without dead ends: 132 [2023-02-15 21:38:46,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 107 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=280, Invalid=3142, Unknown=0, NotChecked=0, Total=3422 [2023-02-15 21:38:46,402 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 61 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:38:46,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 687 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:38:46,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-02-15 21:38:46,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 101. [2023-02-15 21:38:46,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.0857142857142856) internal successors, (76), 68 states have internal predecessors, (76), 10 states have call successors, (10), 4 states have call predecessors, (10), 20 states have return successors, (42), 28 states have call predecessors, (42), 10 states have call successors, (42) [2023-02-15 21:38:46,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 128 transitions. [2023-02-15 21:38:46,409 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 128 transitions. Word has length 66 [2023-02-15 21:38:46,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:38:46,410 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 128 transitions. [2023-02-15 21:38:46,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 37 states have internal predecessors, (98), 17 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (23), 15 states have call predecessors, (23), 17 states have call successors, (23) [2023-02-15 21:38:46,410 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 128 transitions. [2023-02-15 21:38:46,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-15 21:38:46,411 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:38:46,411 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:38:46,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-02-15 21:38:46,633 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,SelfDestructingSolverStorable45 [2023-02-15 21:38:46,633 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:38:46,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:38:46,633 INFO L85 PathProgramCache]: Analyzing trace with hash 724242656, now seen corresponding path program 28 times [2023-02-15 21:38:46,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:38:46,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066364976] [2023-02-15 21:38:46,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:38:46,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:38:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:46,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:38:46,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:46,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:38:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:46,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:38:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:46,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:38:46,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:46,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:38:46,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:46,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:46,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:46,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:46,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:46,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:46,962 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-02-15 21:38:46,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:38:46,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066364976] [2023-02-15 21:38:46,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066364976] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:38:46,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122320832] [2023-02-15 21:38:46,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 21:38:46,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:38:46,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:38:46,964 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) [2023-02-15 21:38:46,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-02-15 21:38:47,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 21:38:47,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:38:47,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-15 21:38:47,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:38:47,653 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-02-15 21:38:47,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:38:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 21:38:49,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122320832] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:38:49,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:38:49,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 23] total 34 [2023-02-15 21:38:49,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989538880] [2023-02-15 21:38:49,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:38:49,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 21:38:49,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:38:49,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 21:38:49,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1024, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 21:38:49,351 INFO L87 Difference]: Start difference. First operand 101 states and 128 transitions. Second operand has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 28 states have internal predecessors, (81), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (20), 10 states have call predecessors, (20), 14 states have call successors, (20) [2023-02-15 21:38:49,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:38:49,706 INFO L93 Difference]: Finished difference Result 129 states and 164 transitions. [2023-02-15 21:38:49,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 21:38:49,706 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 28 states have internal predecessors, (81), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (20), 10 states have call predecessors, (20), 14 states have call successors, (20) Word has length 66 [2023-02-15 21:38:49,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:38:49,707 INFO L225 Difference]: With dead ends: 129 [2023-02-15 21:38:49,707 INFO L226 Difference]: Without dead ends: 125 [2023-02-15 21:38:49,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 111 SyntacticMatches, 18 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=216, Invalid=1764, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 21:38:49,708 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 49 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:38:49,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 574 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:38:49,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-02-15 21:38:49,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 105. [2023-02-15 21:38:49,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 73 states have (on average 1.082191780821918) internal successors, (79), 70 states have internal predecessors, (79), 10 states have call successors, (10), 4 states have call predecessors, (10), 21 states have return successors, (44), 30 states have call predecessors, (44), 10 states have call successors, (44) [2023-02-15 21:38:49,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 133 transitions. [2023-02-15 21:38:49,713 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 133 transitions. Word has length 66 [2023-02-15 21:38:49,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:38:49,713 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 133 transitions. [2023-02-15 21:38:49,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 28 states have internal predecessors, (81), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (20), 10 states have call predecessors, (20), 14 states have call successors, (20) [2023-02-15 21:38:49,714 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 133 transitions. [2023-02-15 21:38:49,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-15 21:38:49,714 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:38:49,714 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:38:49,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-02-15 21:38:49,920 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,SelfDestructingSolverStorable46 [2023-02-15 21:38:49,921 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:38:49,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:38:49,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1572883820, now seen corresponding path program 29 times [2023-02-15 21:38:49,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:38:49,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754845144] [2023-02-15 21:38:49,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:38:49,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:38:49,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:49,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:38:50,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:50,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:38:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:50,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:38:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:50,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:38:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:50,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:38:50,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:50,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 21:38:50,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:50,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:50,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:50,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:50,332 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 19 proven. 40 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-15 21:38:50,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:38:50,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754845144] [2023-02-15 21:38:50,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754845144] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:38:50,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488265857] [2023-02-15 21:38:50,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 21:38:50,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:38:50,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:38:50,334 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) [2023-02-15 21:38:50,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-02-15 21:38:50,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-15 21:38:50,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:38:50,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-15 21:38:50,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:38:51,102 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 41 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-15 21:38:51,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:38:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 8 proven. 74 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 21:38:53,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488265857] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:38:53,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:38:53,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 29] total 55 [2023-02-15 21:38:53,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567334778] [2023-02-15 21:38:53,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:38:53,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-02-15 21:38:53,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:38:53,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-02-15 21:38:53,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=2759, Unknown=0, NotChecked=0, Total=2970 [2023-02-15 21:38:53,770 INFO L87 Difference]: Start difference. First operand 105 states and 133 transitions. Second operand has 55 states, 49 states have (on average 2.061224489795918) internal successors, (101), 43 states have internal predecessors, (101), 19 states have call successors, (19), 1 states have call predecessors, (19), 15 states have return successors, (27), 16 states have call predecessors, (27), 19 states have call successors, (27) [2023-02-15 21:38:54,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:38:54,460 INFO L93 Difference]: Finished difference Result 163 states and 216 transitions. [2023-02-15 21:38:54,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 21:38:54,460 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 49 states have (on average 2.061224489795918) internal successors, (101), 43 states have internal predecessors, (101), 19 states have call successors, (19), 1 states have call predecessors, (19), 15 states have return successors, (27), 16 states have call predecessors, (27), 19 states have call successors, (27) Word has length 74 [2023-02-15 21:38:54,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:38:54,461 INFO L225 Difference]: With dead ends: 163 [2023-02-15 21:38:54,461 INFO L226 Difference]: Without dead ends: 159 [2023-02-15 21:38:54,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 118 SyntacticMatches, 12 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=489, Invalid=4341, Unknown=0, NotChecked=0, Total=4830 [2023-02-15 21:38:54,462 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 84 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 21:38:54,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 717 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 21:38:54,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-02-15 21:38:54,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2023-02-15 21:38:54,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 78 states have internal predecessors, (88), 10 states have call successors, (10), 4 states have call predecessors, (10), 25 states have return successors, (56), 35 states have call predecessors, (56), 10 states have call successors, (56) [2023-02-15 21:38:54,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 154 transitions. [2023-02-15 21:38:54,480 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 154 transitions. Word has length 74 [2023-02-15 21:38:54,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:38:54,481 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 154 transitions. [2023-02-15 21:38:54,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 49 states have (on average 2.061224489795918) internal successors, (101), 43 states have internal predecessors, (101), 19 states have call successors, (19), 1 states have call predecessors, (19), 15 states have return successors, (27), 16 states have call predecessors, (27), 19 states have call successors, (27) [2023-02-15 21:38:54,481 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 154 transitions. [2023-02-15 21:38:54,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-15 21:38:54,482 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:38:54,482 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:38:54,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-02-15 21:38:54,688 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,SelfDestructingSolverStorable47 [2023-02-15 21:38:54,689 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:38:54,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:38:54,689 INFO L85 PathProgramCache]: Analyzing trace with hash -599965996, now seen corresponding path program 30 times [2023-02-15 21:38:54,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:38:54,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43880442] [2023-02-15 21:38:54,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:38:54,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:38:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:54,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:38:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:54,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:38:54,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:54,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:38:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:54,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:38:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:54,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:38:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:54,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 21:38:54,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:54,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:55,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:55,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:55,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:55,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:55,077 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-15 21:38:55,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:38:55,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43880442] [2023-02-15 21:38:55,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43880442] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:38:55,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983390936] [2023-02-15 21:38:55,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 21:38:55,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:38:55,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:38:55,079 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) [2023-02-15 21:38:55,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-02-15 21:38:55,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-15 21:38:55,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:38:55,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-15 21:38:55,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:38:55,846 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-15 21:38:55,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:38:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 21:38:58,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983390936] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:38:58,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:38:58,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 24] total 35 [2023-02-15 21:38:58,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559424112] [2023-02-15 21:38:58,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:38:58,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-15 21:38:58,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:38:58,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-15 21:38:58,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 21:38:58,018 INFO L87 Difference]: Start difference. First operand 118 states and 154 transitions. Second operand has 35 states, 34 states have (on average 2.5) internal successors, (85), 28 states have internal predecessors, (85), 14 states have call successors, (17), 1 states have call predecessors, (17), 11 states have return successors, (23), 11 states have call predecessors, (23), 14 states have call successors, (23) [2023-02-15 21:38:58,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:38:58,382 INFO L93 Difference]: Finished difference Result 150 states and 195 transitions. [2023-02-15 21:38:58,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 21:38:58,383 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.5) internal successors, (85), 28 states have internal predecessors, (85), 14 states have call successors, (17), 1 states have call predecessors, (17), 11 states have return successors, (23), 11 states have call predecessors, (23), 14 states have call successors, (23) Word has length 74 [2023-02-15 21:38:58,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:38:58,384 INFO L225 Difference]: With dead ends: 150 [2023-02-15 21:38:58,384 INFO L226 Difference]: Without dead ends: 146 [2023-02-15 21:38:58,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 130 SyntacticMatches, 18 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=229, Invalid=1933, Unknown=0, NotChecked=0, Total=2162 [2023-02-15 21:38:58,385 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 56 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:38:58,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 520 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:38:58,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-02-15 21:38:58,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 123. [2023-02-15 21:38:58,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 86 states have (on average 1.069767441860465) internal successors, (92), 80 states have internal predecessors, (92), 10 states have call successors, (10), 4 states have call predecessors, (10), 26 states have return successors, (59), 38 states have call predecessors, (59), 10 states have call successors, (59) [2023-02-15 21:38:58,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 161 transitions. [2023-02-15 21:38:58,392 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 161 transitions. Word has length 74 [2023-02-15 21:38:58,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:38:58,392 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 161 transitions. [2023-02-15 21:38:58,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.5) internal successors, (85), 28 states have internal predecessors, (85), 14 states have call successors, (17), 1 states have call predecessors, (17), 11 states have return successors, (23), 11 states have call predecessors, (23), 14 states have call successors, (23) [2023-02-15 21:38:58,392 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 161 transitions. [2023-02-15 21:38:58,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-15 21:38:58,393 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:38:58,393 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:38:58,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-02-15 21:38:58,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:38:58,600 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:38:58,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:38:58,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1898709812, now seen corresponding path program 8 times [2023-02-15 21:38:58,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:38:58,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918236446] [2023-02-15 21:38:58,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:38:58,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:38:58,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:58,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:38:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:58,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:38:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:58,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:38:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:58,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:38:58,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:58,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:38:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:58,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 21:38:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:58,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:58,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:59,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:59,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 40 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-15 21:38:59,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:38:59,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918236446] [2023-02-15 21:38:59,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918236446] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:38:59,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838968925] [2023-02-15 21:38:59,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:38:59,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:38:59,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:38:59,075 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) [2023-02-15 21:38:59,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-02-15 21:38:59,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:38:59,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:38:59,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-15 21:38:59,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:38:59,924 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 16 proven. 48 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 21:38:59,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:39:02,145 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 84 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-15 21:39:02,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838968925] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:39:02,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:39:02,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 25] total 46 [2023-02-15 21:39:02,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439842007] [2023-02-15 21:39:02,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:39:02,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-15 21:39:02,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:39:02,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-15 21:39:02,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1923, Unknown=0, NotChecked=0, Total=2070 [2023-02-15 21:39:02,170 INFO L87 Difference]: Start difference. First operand 123 states and 161 transitions. Second operand has 46 states, 44 states have (on average 2.227272727272727) internal successors, (98), 36 states have internal predecessors, (98), 18 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (25), 14 states have call predecessors, (25), 18 states have call successors, (25) [2023-02-15 21:39:02,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:39:02,830 INFO L93 Difference]: Finished difference Result 157 states and 203 transitions. [2023-02-15 21:39:02,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 21:39:02,831 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 2.227272727272727) internal successors, (98), 36 states have internal predecessors, (98), 18 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (25), 14 states have call predecessors, (25), 18 states have call successors, (25) Word has length 74 [2023-02-15 21:39:02,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:39:02,831 INFO L225 Difference]: With dead ends: 157 [2023-02-15 21:39:02,831 INFO L226 Difference]: Without dead ends: 153 [2023-02-15 21:39:02,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 124 SyntacticMatches, 14 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=371, Invalid=3051, Unknown=0, NotChecked=0, Total=3422 [2023-02-15 21:39:02,832 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 59 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 21:39:02,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 739 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 21:39:02,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-02-15 21:39:02,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 120. [2023-02-15 21:39:02,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 84 states have (on average 1.0714285714285714) internal successors, (90), 78 states have internal predecessors, (90), 10 states have call successors, (10), 4 states have call predecessors, (10), 25 states have return successors, (56), 37 states have call predecessors, (56), 10 states have call successors, (56) [2023-02-15 21:39:02,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 156 transitions. [2023-02-15 21:39:02,843 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 156 transitions. Word has length 74 [2023-02-15 21:39:02,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:39:02,843 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 156 transitions. [2023-02-15 21:39:02,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 2.227272727272727) internal successors, (98), 36 states have internal predecessors, (98), 18 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (25), 14 states have call predecessors, (25), 18 states have call successors, (25) [2023-02-15 21:39:02,843 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 156 transitions. [2023-02-15 21:39:02,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-15 21:39:02,844 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:39:02,844 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:39:02,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-02-15 21:39:03,057 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,SelfDestructingSolverStorable49 [2023-02-15 21:39:03,057 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:39:03,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:39:03,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1410533388, now seen corresponding path program 31 times [2023-02-15 21:39:03,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:39:03,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922232034] [2023-02-15 21:39:03,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:39:03,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:39:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:03,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:39:03,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:03,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:03,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:03,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:03,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:03,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:03,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:03,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:03,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 21:39:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:03,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:03,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:03,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:03,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:03,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:03,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:03,532 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 43 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 21:39:03,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:39:03,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922232034] [2023-02-15 21:39:03,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922232034] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:39:03,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686730821] [2023-02-15 21:39:03,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 21:39:03,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:39:03,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:39:03,534 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) [2023-02-15 21:39:03,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-02-15 21:39:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:04,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-15 21:39:04,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:39:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 21:39:04,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:39:07,029 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 8 proven. 72 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 21:39:07,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686730821] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:39:07,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:39:07,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 29] total 55 [2023-02-15 21:39:07,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241705415] [2023-02-15 21:39:07,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:39:07,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-02-15 21:39:07,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:39:07,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-02-15 21:39:07,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=2749, Unknown=0, NotChecked=0, Total=2970 [2023-02-15 21:39:07,031 INFO L87 Difference]: Start difference. First operand 120 states and 156 transitions. Second operand has 55 states, 47 states have (on average 2.106382978723404) internal successors, (99), 42 states have internal predecessors, (99), 20 states have call successors, (20), 1 states have call predecessors, (20), 15 states have return successors, (26), 17 states have call predecessors, (26), 20 states have call successors, (26) [2023-02-15 21:39:08,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:39:08,131 INFO L93 Difference]: Finished difference Result 225 states and 305 transitions. [2023-02-15 21:39:08,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 21:39:08,132 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 47 states have (on average 2.106382978723404) internal successors, (99), 42 states have internal predecessors, (99), 20 states have call successors, (20), 1 states have call predecessors, (20), 15 states have return successors, (26), 17 states have call predecessors, (26), 20 states have call successors, (26) Word has length 74 [2023-02-15 21:39:08,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:39:08,133 INFO L225 Difference]: With dead ends: 225 [2023-02-15 21:39:08,133 INFO L226 Difference]: Without dead ends: 221 [2023-02-15 21:39:08,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 116 SyntacticMatches, 15 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=508, Invalid=4462, Unknown=0, NotChecked=0, Total=4970 [2023-02-15 21:39:08,134 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 77 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 1378 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 21:39:08,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 921 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1378 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 21:39:08,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-02-15 21:39:08,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 111. [2023-02-15 21:39:08,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 77 states have (on average 1.077922077922078) internal successors, (83), 74 states have internal predecessors, (83), 10 states have call successors, (10), 4 states have call predecessors, (10), 23 states have return successors, (50), 32 states have call predecessors, (50), 10 states have call successors, (50) [2023-02-15 21:39:08,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 143 transitions. [2023-02-15 21:39:08,147 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 143 transitions. Word has length 74 [2023-02-15 21:39:08,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:39:08,147 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 143 transitions. [2023-02-15 21:39:08,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 47 states have (on average 2.106382978723404) internal successors, (99), 42 states have internal predecessors, (99), 20 states have call successors, (20), 1 states have call predecessors, (20), 15 states have return successors, (26), 17 states have call predecessors, (26), 20 states have call successors, (26) [2023-02-15 21:39:08,148 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 143 transitions. [2023-02-15 21:39:08,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-15 21:39:08,148 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:39:08,148 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:39:08,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-02-15 21:39:08,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:39:08,349 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:39:08,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:39:08,349 INFO L85 PathProgramCache]: Analyzing trace with hash -437615564, now seen corresponding path program 32 times [2023-02-15 21:39:08,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:39:08,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745060163] [2023-02-15 21:39:08,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:39:08,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:39:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:08,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:39:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:08,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:08,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:08,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:08,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:08,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:08,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 21:39:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:08,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:08,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:08,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:08,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-15 21:39:08,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:39:08,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745060163] [2023-02-15 21:39:08,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745060163] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:39:08,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650532882] [2023-02-15 21:39:08,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:39:08,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:39:08,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:39:08,832 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) [2023-02-15 21:39:08,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-02-15 21:39:09,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:39:09,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:39:09,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-15 21:39:09,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:39:09,811 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-15 21:39:09,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:39:18,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650532882] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:39:18,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 21:39:18,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 37 [2023-02-15 21:39:18,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173298183] [2023-02-15 21:39:18,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 21:39:18,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-15 21:39:18,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:39:18,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-15 21:39:18,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=2259, Unknown=4, NotChecked=0, Total=2450 [2023-02-15 21:39:18,173 INFO L87 Difference]: Start difference. First operand 111 states and 143 transitions. Second operand has 37 states, 32 states have (on average 2.03125) internal successors, (65), 27 states have internal predecessors, (65), 11 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2023-02-15 21:39:18,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:39:18,909 INFO L93 Difference]: Finished difference Result 186 states and 249 transitions. [2023-02-15 21:39:18,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 21:39:18,909 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 32 states have (on average 2.03125) internal successors, (65), 27 states have internal predecessors, (65), 11 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) Word has length 74 [2023-02-15 21:39:18,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:39:18,910 INFO L225 Difference]: With dead ends: 186 [2023-02-15 21:39:18,910 INFO L226 Difference]: Without dead ends: 182 [2023-02-15 21:39:18,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 97 SyntacticMatches, 10 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=388, Invalid=3514, Unknown=4, NotChecked=0, Total=3906 [2023-02-15 21:39:18,911 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 35 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 21:39:18,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 592 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 21:39:18,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-02-15 21:39:18,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 130. [2023-02-15 21:39:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 91 states have (on average 1.065934065934066) internal successors, (97), 84 states have internal predecessors, (97), 10 states have call successors, (10), 4 states have call predecessors, (10), 28 states have return successors, (64), 41 states have call predecessors, (64), 10 states have call successors, (64) [2023-02-15 21:39:18,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 171 transitions. [2023-02-15 21:39:18,919 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 171 transitions. Word has length 74 [2023-02-15 21:39:18,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:39:18,919 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 171 transitions. [2023-02-15 21:39:18,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 32 states have (on average 2.03125) internal successors, (65), 27 states have internal predecessors, (65), 11 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2023-02-15 21:39:18,920 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 171 transitions. [2023-02-15 21:39:18,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-15 21:39:18,932 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:39:18,932 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:39:18,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-02-15 21:39:19,150 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,SelfDestructingSolverStorable51 [2023-02-15 21:39:19,151 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:39:19,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:39:19,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1073359060, now seen corresponding path program 33 times [2023-02-15 21:39:19,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:39:19,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978471007] [2023-02-15 21:39:19,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:39:19,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:39:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:19,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:39:19,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:19,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:19,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:19,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:19,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:19,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 21:39:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:19,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:19,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:19,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:19,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 46 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-15 21:39:19,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:39:19,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978471007] [2023-02-15 21:39:19,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978471007] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:39:19,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872797392] [2023-02-15 21:39:19,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:39:19,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:39:19,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:39:19,579 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) [2023-02-15 21:39:19,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-02-15 21:39:20,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-15 21:39:20,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:39:20,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-15 21:39:20,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:39:20,562 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-15 21:39:20,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:39:22,915 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 21:39:22,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872797392] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:39:22,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:39:22,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 28] total 56 [2023-02-15 21:39:22,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113664022] [2023-02-15 21:39:22,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:39:22,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-15 21:39:22,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:39:22,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-15 21:39:22,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2906, Unknown=0, NotChecked=0, Total=3080 [2023-02-15 21:39:22,918 INFO L87 Difference]: Start difference. First operand 130 states and 171 transitions. Second operand has 56 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 43 states have internal predecessors, (112), 22 states have call successors, (23), 1 states have call predecessors, (23), 16 states have return successors, (27), 17 states have call predecessors, (27), 22 states have call successors, (27) [2023-02-15 21:39:23,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:39:23,906 INFO L93 Difference]: Finished difference Result 215 states and 290 transitions. [2023-02-15 21:39:23,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 21:39:23,906 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 43 states have internal predecessors, (112), 22 states have call successors, (23), 1 states have call predecessors, (23), 16 states have return successors, (27), 17 states have call predecessors, (27), 22 states have call successors, (27) Word has length 74 [2023-02-15 21:39:23,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:39:23,907 INFO L225 Difference]: With dead ends: 215 [2023-02-15 21:39:23,907 INFO L226 Difference]: Without dead ends: 211 [2023-02-15 21:39:23,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 117 SyntacticMatches, 12 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=444, Invalid=5106, Unknown=0, NotChecked=0, Total=5550 [2023-02-15 21:39:23,908 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 122 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 1540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 21:39:23,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 805 Invalid, 1540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1435 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 21:39:23,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-02-15 21:39:23,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 115. [2023-02-15 21:39:23,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 80 states have (on average 1.075) internal successors, (86), 76 states have internal predecessors, (86), 10 states have call successors, (10), 4 states have call predecessors, (10), 24 states have return successors, (53), 34 states have call predecessors, (53), 10 states have call successors, (53) [2023-02-15 21:39:23,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 149 transitions. [2023-02-15 21:39:23,917 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 149 transitions. Word has length 74 [2023-02-15 21:39:23,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:39:23,917 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 149 transitions. [2023-02-15 21:39:23,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 43 states have internal predecessors, (112), 22 states have call successors, (23), 1 states have call predecessors, (23), 16 states have return successors, (27), 17 states have call predecessors, (27), 22 states have call successors, (27) [2023-02-15 21:39:23,917 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 149 transitions. [2023-02-15 21:39:23,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-15 21:39:23,918 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:39:23,918 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:39:23,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-02-15 21:39:24,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:39:24,126 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:39:24,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:39:24,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1425316748, now seen corresponding path program 34 times [2023-02-15 21:39:24,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:39:24,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220819092] [2023-02-15 21:39:24,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:39:24,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:39:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:24,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:39:24,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:24,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:24,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:24,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:24,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:24,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:24,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:24,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 21:39:24,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:24,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:24,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:24,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:24,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-15 21:39:24,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:39:24,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220819092] [2023-02-15 21:39:24,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220819092] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:39:24,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959876068] [2023-02-15 21:39:24,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 21:39:24,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:39:24,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:39:24,490 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) [2023-02-15 21:39:24,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-02-15 21:39:25,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 21:39:25,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:39:25,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-15 21:39:25,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:39:25,512 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 35 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-02-15 21:39:25,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:39:29,814 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 3 proven. 77 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 21:39:29,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959876068] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:39:29,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:39:29,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 27] total 53 [2023-02-15 21:39:29,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464504819] [2023-02-15 21:39:29,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:39:29,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-15 21:39:29,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:39:29,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-15 21:39:29,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2588, Unknown=0, NotChecked=0, Total=2756 [2023-02-15 21:39:29,817 INFO L87 Difference]: Start difference. First operand 115 states and 149 transitions. Second operand has 53 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 18 states have call successors, (21), 1 states have call predecessors, (21), 17 states have return successors, (26), 18 states have call predecessors, (26), 18 states have call successors, (26) [2023-02-15 21:39:30,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:39:30,701 INFO L93 Difference]: Finished difference Result 174 states and 235 transitions. [2023-02-15 21:39:30,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 21:39:30,702 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 18 states have call successors, (21), 1 states have call predecessors, (21), 17 states have return successors, (26), 18 states have call predecessors, (26), 18 states have call successors, (26) Word has length 74 [2023-02-15 21:39:30,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:39:30,703 INFO L225 Difference]: With dead ends: 174 [2023-02-15 21:39:30,703 INFO L226 Difference]: Without dead ends: 170 [2023-02-15 21:39:30,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 122 SyntacticMatches, 9 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=339, Invalid=3951, Unknown=0, NotChecked=0, Total=4290 [2023-02-15 21:39:30,704 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 51 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 1343 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 21:39:30,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 815 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1343 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 21:39:30,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-02-15 21:39:30,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 120. [2023-02-15 21:39:30,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 84 states have (on average 1.0714285714285714) internal successors, (90), 78 states have internal predecessors, (90), 10 states have call successors, (10), 4 states have call predecessors, (10), 25 states have return successors, (55), 37 states have call predecessors, (55), 10 states have call successors, (55) [2023-02-15 21:39:30,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 155 transitions. [2023-02-15 21:39:30,710 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 155 transitions. Word has length 74 [2023-02-15 21:39:30,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:39:30,711 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 155 transitions. [2023-02-15 21:39:30,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 18 states have call successors, (21), 1 states have call predecessors, (21), 17 states have return successors, (26), 18 states have call predecessors, (26), 18 states have call successors, (26) [2023-02-15 21:39:30,711 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 155 transitions. [2023-02-15 21:39:30,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-15 21:39:30,712 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:39:30,712 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:39:30,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-02-15 21:39:30,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:39:30,912 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:39:30,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:39:30,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2059083156, now seen corresponding path program 35 times [2023-02-15 21:39:30,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:39:30,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973591838] [2023-02-15 21:39:30,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:39:30,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:39:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:30,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:39:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:31,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:31,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:31,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:31,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:31,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:31,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 21:39:31,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:31,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:31,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:31,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:31,323 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-02-15 21:39:31,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:39:31,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973591838] [2023-02-15 21:39:31,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973591838] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:39:31,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317803730] [2023-02-15 21:39:31,324 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 21:39:31,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:39:31,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:39:31,325 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) [2023-02-15 21:39:31,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-02-15 21:39:31,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-15 21:39:31,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:39:31,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-15 21:39:31,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:39:32,357 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 17 proven. 40 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-02-15 21:39:32,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:39:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 76 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 21:39:34,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317803730] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:39:34,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:39:34,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 28] total 47 [2023-02-15 21:39:34,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249727441] [2023-02-15 21:39:34,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:39:34,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-15 21:39:34,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:39:34,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-15 21:39:34,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2006, Unknown=0, NotChecked=0, Total=2162 [2023-02-15 21:39:34,197 INFO L87 Difference]: Start difference. First operand 120 states and 155 transitions. Second operand has 47 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 36 states have internal predecessors, (93), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (24), 15 states have call predecessors, (24), 17 states have call successors, (24) [2023-02-15 21:39:34,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:39:34,968 INFO L93 Difference]: Finished difference Result 181 states and 244 transitions. [2023-02-15 21:39:34,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 21:39:34,969 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 36 states have internal predecessors, (93), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (24), 15 states have call predecessors, (24), 17 states have call successors, (24) Word has length 74 [2023-02-15 21:39:34,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:39:34,970 INFO L225 Difference]: With dead ends: 181 [2023-02-15 21:39:34,970 INFO L226 Difference]: Without dead ends: 177 [2023-02-15 21:39:34,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 117 SyntacticMatches, 20 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=430, Invalid=3602, Unknown=0, NotChecked=0, Total=4032 [2023-02-15 21:39:34,970 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 51 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 1432 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 21:39:34,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 904 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1432 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 21:39:34,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-02-15 21:39:34,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 110. [2023-02-15 21:39:34,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 77 states have (on average 1.077922077922078) internal successors, (83), 72 states have internal predecessors, (83), 10 states have call successors, (10), 4 states have call predecessors, (10), 22 states have return successors, (48), 33 states have call predecessors, (48), 10 states have call successors, (48) [2023-02-15 21:39:34,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 141 transitions. [2023-02-15 21:39:34,979 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 141 transitions. Word has length 74 [2023-02-15 21:39:34,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:39:34,979 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 141 transitions. [2023-02-15 21:39:34,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 36 states have internal predecessors, (93), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (24), 15 states have call predecessors, (24), 17 states have call successors, (24) [2023-02-15 21:39:34,979 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 141 transitions. [2023-02-15 21:39:34,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-15 21:39:34,980 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:39:34,980 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:39:35,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-02-15 21:39:35,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-02-15 21:39:35,181 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:39:35,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:39:35,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1262966316, now seen corresponding path program 36 times [2023-02-15 21:39:35,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:39:35,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331744122] [2023-02-15 21:39:35,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:39:35,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:39:35,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:35,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:39:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:35,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:35,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:35,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:35,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:35,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:35,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 21:39:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:35,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:35,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:35,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:35,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:35,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-15 21:39:35,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:39:35,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331744122] [2023-02-15 21:39:35,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331744122] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:39:35,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977127132] [2023-02-15 21:39:35,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 21:39:35,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:39:35,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:39:35,570 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) [2023-02-15 21:39:35,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-02-15 21:39:36,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-15 21:39:36,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:39:36,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-15 21:39:36,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:39:36,510 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-15 21:39:36,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:39:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 21:39:38,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977127132] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:39:38,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:39:38,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 24] total 35 [2023-02-15 21:39:38,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662508940] [2023-02-15 21:39:38,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:39:38,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-15 21:39:38,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:39:38,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-15 21:39:38,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 21:39:38,339 INFO L87 Difference]: Start difference. First operand 110 states and 141 transitions. Second operand has 35 states, 34 states have (on average 2.5) internal successors, (85), 28 states have internal predecessors, (85), 14 states have call successors, (17), 1 states have call predecessors, (17), 11 states have return successors, (23), 11 states have call predecessors, (23), 14 states have call successors, (23) [2023-02-15 21:39:38,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:39:38,856 INFO L93 Difference]: Finished difference Result 147 states and 189 transitions. [2023-02-15 21:39:38,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 21:39:38,856 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.5) internal successors, (85), 28 states have internal predecessors, (85), 14 states have call successors, (17), 1 states have call predecessors, (17), 11 states have return successors, (23), 11 states have call predecessors, (23), 14 states have call successors, (23) Word has length 74 [2023-02-15 21:39:38,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:39:38,859 INFO L225 Difference]: With dead ends: 147 [2023-02-15 21:39:38,859 INFO L226 Difference]: Without dead ends: 143 [2023-02-15 21:39:38,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 128 SyntacticMatches, 20 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=229, Invalid=1933, Unknown=0, NotChecked=0, Total=2162 [2023-02-15 21:39:38,859 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 60 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:39:38,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 549 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:39:38,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-02-15 21:39:38,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 120. [2023-02-15 21:39:38,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 84 states have (on average 1.0714285714285714) internal successors, (90), 78 states have internal predecessors, (90), 10 states have call successors, (10), 4 states have call predecessors, (10), 25 states have return successors, (56), 37 states have call predecessors, (56), 10 states have call successors, (56) [2023-02-15 21:39:38,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 156 transitions. [2023-02-15 21:39:38,878 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 156 transitions. Word has length 74 [2023-02-15 21:39:38,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:39:38,878 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 156 transitions. [2023-02-15 21:39:38,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.5) internal successors, (85), 28 states have internal predecessors, (85), 14 states have call successors, (17), 1 states have call predecessors, (17), 11 states have return successors, (23), 11 states have call predecessors, (23), 14 states have call successors, (23) [2023-02-15 21:39:38,879 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 156 transitions. [2023-02-15 21:39:38,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-02-15 21:39:38,879 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:39:38,879 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:39:38,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-02-15 21:39:39,088 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,SelfDestructingSolverStorable55 [2023-02-15 21:39:39,088 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:39:39,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:39:39,089 INFO L85 PathProgramCache]: Analyzing trace with hash 256823296, now seen corresponding path program 37 times [2023-02-15 21:39:39,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:39:39,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639590759] [2023-02-15 21:39:39,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:39:39,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:39:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:39,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:39:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:39,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:39,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:39,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:39,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:39,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:39,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:39,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-15 21:39:39,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:39,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:39,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:39,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:39,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:39,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:39,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:39,631 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 33 proven. 48 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-15 21:39:39,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:39:39,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639590759] [2023-02-15 21:39:39,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639590759] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:39:39,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038328235] [2023-02-15 21:39:39,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 21:39:39,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:39:39,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:39:39,633 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) [2023-02-15 21:39:39,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-02-15 21:39:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:40,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-15 21:39:40,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:39:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 28 proven. 54 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-15 21:39:40,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:39:44,033 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 7 proven. 103 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-15 21:39:44,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038328235] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:39:44,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:39:44,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 29] total 49 [2023-02-15 21:39:44,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527432878] [2023-02-15 21:39:44,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:39:44,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-15 21:39:44,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:39:44,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-15 21:39:44,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2191, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 21:39:44,035 INFO L87 Difference]: Start difference. First operand 120 states and 156 transitions. Second operand has 49 states, 47 states have (on average 2.25531914893617) internal successors, (106), 37 states have internal predecessors, (106), 19 states have call successors, (21), 1 states have call predecessors, (21), 14 states have return successors, (28), 16 states have call predecessors, (28), 19 states have call successors, (28) [2023-02-15 21:39:45,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:39:45,009 INFO L93 Difference]: Finished difference Result 185 states and 242 transitions. [2023-02-15 21:39:45,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 21:39:45,010 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 2.25531914893617) internal successors, (106), 37 states have internal predecessors, (106), 19 states have call successors, (21), 1 states have call predecessors, (21), 14 states have return successors, (28), 16 states have call predecessors, (28), 19 states have call successors, (28) Word has length 82 [2023-02-15 21:39:45,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:39:45,011 INFO L225 Difference]: With dead ends: 185 [2023-02-15 21:39:45,011 INFO L226 Difference]: Without dead ends: 181 [2023-02-15 21:39:45,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 140 SyntacticMatches, 15 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=497, Invalid=3925, Unknown=0, NotChecked=0, Total=4422 [2023-02-15 21:39:45,012 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 53 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 21:39:45,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 738 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 21:39:45,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-15 21:39:45,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 119. [2023-02-15 21:39:45,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 83 states have (on average 1.072289156626506) internal successors, (89), 78 states have internal predecessors, (89), 10 states have call successors, (10), 4 states have call predecessors, (10), 25 states have return successors, (56), 36 states have call predecessors, (56), 10 states have call successors, (56) [2023-02-15 21:39:45,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 155 transitions. [2023-02-15 21:39:45,018 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 155 transitions. Word has length 82 [2023-02-15 21:39:45,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:39:45,018 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 155 transitions. [2023-02-15 21:39:45,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 2.25531914893617) internal successors, (106), 37 states have internal predecessors, (106), 19 states have call successors, (21), 1 states have call predecessors, (21), 14 states have return successors, (28), 16 states have call predecessors, (28), 19 states have call successors, (28) [2023-02-15 21:39:45,019 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 155 transitions. [2023-02-15 21:39:45,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-02-15 21:39:45,019 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:39:45,019 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:39:45,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-02-15 21:39:45,220 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,SelfDestructingSolverStorable56 [2023-02-15 21:39:45,220 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:39:45,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:39:45,220 INFO L85 PathProgramCache]: Analyzing trace with hash 823420064, now seen corresponding path program 38 times [2023-02-15 21:39:45,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:39:45,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046898685] [2023-02-15 21:39:45,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:39:45,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:39:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:45,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:39:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:45,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:45,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:45,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:45,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:45,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:45,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:45,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:45,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-15 21:39:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:45,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:45,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:45,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:45,732 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 28 proven. 49 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-15 21:39:45,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:39:45,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046898685] [2023-02-15 21:39:45,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046898685] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:39:45,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927837184] [2023-02-15 21:39:45,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:39:45,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:39:45,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:39:45,734 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) [2023-02-15 21:39:45,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-02-15 21:39:46,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:39:46,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:39:46,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-15 21:39:46,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:39:46,872 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-02-15 21:39:46,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:39:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 11 proven. 97 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 21:39:49,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927837184] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:39:49,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:39:49,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 32] total 58 [2023-02-15 21:39:49,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248987053] [2023-02-15 21:39:49,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:39:49,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-02-15 21:39:49,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:39:49,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-02-15 21:39:49,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=3077, Unknown=0, NotChecked=0, Total=3306 [2023-02-15 21:39:49,912 INFO L87 Difference]: Start difference. First operand 119 states and 155 transitions. Second operand has 58 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 44 states have internal predecessors, (109), 20 states have call successors, (22), 1 states have call predecessors, (22), 15 states have return successors, (30), 18 states have call predecessors, (30), 20 states have call successors, (30) [2023-02-15 21:39:50,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:39:50,735 INFO L93 Difference]: Finished difference Result 207 states and 287 transitions. [2023-02-15 21:39:50,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 21:39:50,736 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 44 states have internal predecessors, (109), 20 states have call successors, (22), 1 states have call predecessors, (22), 15 states have return successors, (30), 18 states have call predecessors, (30), 20 states have call successors, (30) Word has length 82 [2023-02-15 21:39:50,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:39:50,737 INFO L225 Difference]: With dead ends: 207 [2023-02-15 21:39:50,737 INFO L226 Difference]: Without dead ends: 203 [2023-02-15 21:39:50,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 133 SyntacticMatches, 14 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1458 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=582, Invalid=4968, Unknown=0, NotChecked=0, Total=5550 [2023-02-15 21:39:50,738 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 83 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 21:39:50,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 767 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 21:39:50,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-02-15 21:39:50,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 119. [2023-02-15 21:39:50,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 83 states have (on average 1.072289156626506) internal successors, (89), 78 states have internal predecessors, (89), 10 states have call successors, (10), 4 states have call predecessors, (10), 25 states have return successors, (56), 36 states have call predecessors, (56), 10 states have call successors, (56) [2023-02-15 21:39:50,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 155 transitions. [2023-02-15 21:39:50,745 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 155 transitions. Word has length 82 [2023-02-15 21:39:50,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:39:50,745 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 155 transitions. [2023-02-15 21:39:50,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 44 states have internal predecessors, (109), 20 states have call successors, (22), 1 states have call predecessors, (22), 15 states have return successors, (30), 18 states have call predecessors, (30), 20 states have call successors, (30) [2023-02-15 21:39:50,745 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 155 transitions. [2023-02-15 21:39:50,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-02-15 21:39:50,746 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:39:50,746 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:39:50,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-02-15 21:39:50,946 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,SelfDestructingSolverStorable57 [2023-02-15 21:39:50,947 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:39:50,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:39:50,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1271964480, now seen corresponding path program 39 times [2023-02-15 21:39:50,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:39:50,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029649527] [2023-02-15 21:39:50,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:39:50,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:39:50,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:51,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:39:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:51,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:51,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:51,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:51,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:51,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:51,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:51,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:51,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-15 21:39:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:51,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:51,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:51,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 24 proven. 53 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-15 21:39:51,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:39:51,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029649527] [2023-02-15 21:39:51,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029649527] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:39:51,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706035585] [2023-02-15 21:39:51,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:39:51,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:39:51,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:39:51,504 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) [2023-02-15 21:39:51,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-02-15 21:39:52,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-15 21:39:52,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:39:52,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 51 conjunts are in the unsatisfiable core [2023-02-15 21:39:52,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:39:52,795 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 34 proven. 49 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-02-15 21:39:52,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:39:56,236 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 5 proven. 103 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 21:39:56,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706035585] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:39:56,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:39:56,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 31] total 60 [2023-02-15 21:39:56,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647931329] [2023-02-15 21:39:56,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:39:56,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-15 21:39:56,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:39:56,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-15 21:39:56,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=3308, Unknown=0, NotChecked=0, Total=3540 [2023-02-15 21:39:56,238 INFO L87 Difference]: Start difference. First operand 119 states and 155 transitions. Second operand has 60 states, 53 states have (on average 2.150943396226415) internal successors, (114), 45 states have internal predecessors, (114), 22 states have call successors, (24), 1 states have call predecessors, (24), 16 states have return successors, (30), 19 states have call predecessors, (30), 22 states have call successors, (30) [2023-02-15 21:39:57,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:39:57,657 INFO L93 Difference]: Finished difference Result 225 states and 306 transitions. [2023-02-15 21:39:57,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 21:39:57,658 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 53 states have (on average 2.150943396226415) internal successors, (114), 45 states have internal predecessors, (114), 22 states have call successors, (24), 1 states have call predecessors, (24), 16 states have return successors, (30), 19 states have call predecessors, (30), 22 states have call successors, (30) Word has length 82 [2023-02-15 21:39:57,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:39:57,659 INFO L225 Difference]: With dead ends: 225 [2023-02-15 21:39:57,659 INFO L226 Difference]: Without dead ends: 221 [2023-02-15 21:39:57,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 131 SyntacticMatches, 15 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1564 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=768, Invalid=6038, Unknown=0, NotChecked=0, Total=6806 [2023-02-15 21:39:57,660 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 42 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 1942 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 1972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 21:39:57,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 1191 Invalid, 1972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1942 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 21:39:57,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-02-15 21:39:57,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 109. [2023-02-15 21:39:57,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 72 states have internal predecessors, (82), 10 states have call successors, (10), 4 states have call predecessors, (10), 22 states have return successors, (48), 32 states have call predecessors, (48), 10 states have call successors, (48) [2023-02-15 21:39:57,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 140 transitions. [2023-02-15 21:39:57,670 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 140 transitions. Word has length 82 [2023-02-15 21:39:57,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:39:57,670 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 140 transitions. [2023-02-15 21:39:57,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 53 states have (on average 2.150943396226415) internal successors, (114), 45 states have internal predecessors, (114), 22 states have call successors, (24), 1 states have call predecessors, (24), 16 states have return successors, (30), 19 states have call predecessors, (30), 22 states have call successors, (30) [2023-02-15 21:39:57,670 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 140 transitions. [2023-02-15 21:39:57,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-02-15 21:39:57,671 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:39:57,671 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:39:57,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-02-15 21:39:57,880 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,SelfDestructingSolverStorable58 [2023-02-15 21:39:57,881 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:39:57,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:39:57,881 INFO L85 PathProgramCache]: Analyzing trace with hash 920340064, now seen corresponding path program 40 times [2023-02-15 21:39:57,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:39:57,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357270741] [2023-02-15 21:39:57,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:39:57,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:39:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:57,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:39:57,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:58,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:58,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:58,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:58,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:58,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:58,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:39:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:58,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-15 21:39:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:58,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:58,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:58,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:39:58,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:39:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 24 proven. 55 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-15 21:39:58,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:39:58,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357270741] [2023-02-15 21:39:58,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357270741] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:39:58,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783380580] [2023-02-15 21:39:58,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 21:39:58,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:39:58,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:39:58,423 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) [2023-02-15 21:39:58,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-02-15 21:39:59,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 21:39:59,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:39:59,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-15 21:39:59,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:39:59,689 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-15 21:39:59,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:40:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 9 proven. 99 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 21:40:03,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783380580] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:40:03,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:40:03,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 30] total 63 [2023-02-15 21:40:03,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875774585] [2023-02-15 21:40:03,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:40:03,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-02-15 21:40:03,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:40:03,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-02-15 21:40:03,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=3699, Unknown=0, NotChecked=0, Total=3906 [2023-02-15 21:40:03,321 INFO L87 Difference]: Start difference. First operand 109 states and 140 transitions. Second operand has 63 states, 57 states have (on average 2.087719298245614) internal successors, (119), 45 states have internal predecessors, (119), 22 states have call successors, (25), 1 states have call predecessors, (25), 20 states have return successors, (30), 22 states have call predecessors, (30), 22 states have call successors, (30) [2023-02-15 21:40:05,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:40:05,022 INFO L93 Difference]: Finished difference Result 257 states and 352 transitions. [2023-02-15 21:40:05,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-15 21:40:05,022 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 57 states have (on average 2.087719298245614) internal successors, (119), 45 states have internal predecessors, (119), 22 states have call successors, (25), 1 states have call predecessors, (25), 20 states have return successors, (30), 22 states have call predecessors, (30), 22 states have call successors, (30) Word has length 82 [2023-02-15 21:40:05,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:40:05,024 INFO L225 Difference]: With dead ends: 257 [2023-02-15 21:40:05,024 INFO L226 Difference]: Without dead ends: 253 [2023-02-15 21:40:05,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 135 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1151 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=698, Invalid=7312, Unknown=0, NotChecked=0, Total=8010 [2023-02-15 21:40:05,025 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 150 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 1803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 21:40:05,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 961 Invalid, 1803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1672 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 21:40:05,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-02-15 21:40:05,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 90. [2023-02-15 21:40:05,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 62 states have (on average 1.096774193548387) internal successors, (68), 62 states have internal predecessors, (68), 10 states have call successors, (10), 4 states have call predecessors, (10), 17 states have return successors, (34), 23 states have call predecessors, (34), 10 states have call successors, (34) [2023-02-15 21:40:05,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2023-02-15 21:40:05,032 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 82 [2023-02-15 21:40:05,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:40:05,032 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2023-02-15 21:40:05,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 57 states have (on average 2.087719298245614) internal successors, (119), 45 states have internal predecessors, (119), 22 states have call successors, (25), 1 states have call predecessors, (25), 20 states have return successors, (30), 22 states have call predecessors, (30), 22 states have call successors, (30) [2023-02-15 21:40:05,033 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2023-02-15 21:40:05,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-02-15 21:40:05,033 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:40:05,033 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:40:05,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-02-15 21:40:05,242 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,SelfDestructingSolverStorable59 [2023-02-15 21:40:05,242 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:40:05,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:40:05,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1935481248, now seen corresponding path program 41 times [2023-02-15 21:40:05,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:40:05,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406799916] [2023-02-15 21:40:05,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:40:05,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:40:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:05,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:40:05,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:05,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:40:05,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:05,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:40:05,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:05,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:40:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:05,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:40:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:05,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:40:05,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:05,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-15 21:40:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:05,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:05,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:05,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:05,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:05,875 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 25 proven. 57 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-15 21:40:05,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:40:05,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406799916] [2023-02-15 21:40:05,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406799916] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:40:05,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11825735] [2023-02-15 21:40:05,876 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 21:40:05,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:40:05,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:40:05,885 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) [2023-02-15 21:40:05,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-02-15 21:40:06,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-15 21:40:06,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:40:06,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-15 21:40:06,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:40:07,115 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 29 proven. 51 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-02-15 21:40:07,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:40:10,019 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 12 proven. 100 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 21:40:10,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11825735] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:40:10,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:40:10,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 31] total 49 [2023-02-15 21:40:10,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929761786] [2023-02-15 21:40:10,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:40:10,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-15 21:40:10,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:40:10,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-15 21:40:10,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2167, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 21:40:10,021 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand has 49 states, 44 states have (on average 2.25) internal successors, (99), 38 states have internal predecessors, (99), 19 states have call successors, (20), 1 states have call predecessors, (20), 13 states have return successors, (27), 15 states have call predecessors, (27), 19 states have call successors, (27) [2023-02-15 21:40:10,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:40:10,874 INFO L93 Difference]: Finished difference Result 136 states and 176 transitions. [2023-02-15 21:40:10,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 21:40:10,874 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 44 states have (on average 2.25) internal successors, (99), 38 states have internal predecessors, (99), 19 states have call successors, (20), 1 states have call predecessors, (20), 13 states have return successors, (27), 15 states have call predecessors, (27), 19 states have call successors, (27) Word has length 82 [2023-02-15 21:40:10,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:40:10,875 INFO L225 Difference]: With dead ends: 136 [2023-02-15 21:40:10,875 INFO L226 Difference]: Without dead ends: 132 [2023-02-15 21:40:10,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 133 SyntacticMatches, 24 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1156 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=471, Invalid=3689, Unknown=0, NotChecked=0, Total=4160 [2023-02-15 21:40:10,876 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 60 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 21:40:10,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 744 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 21:40:10,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-02-15 21:40:10,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 72. [2023-02-15 21:40:10,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 50 states have (on average 1.12) internal successors, (56), 51 states have internal predecessors, (56), 9 states have call successors, (9), 4 states have call predecessors, (9), 12 states have return successors, (21), 16 states have call predecessors, (21), 9 states have call successors, (21) [2023-02-15 21:40:10,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2023-02-15 21:40:10,879 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 82 [2023-02-15 21:40:10,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:40:10,879 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2023-02-15 21:40:10,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 44 states have (on average 2.25) internal successors, (99), 38 states have internal predecessors, (99), 19 states have call successors, (20), 1 states have call predecessors, (20), 13 states have return successors, (27), 15 states have call predecessors, (27), 19 states have call successors, (27) [2023-02-15 21:40:10,880 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2023-02-15 21:40:10,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-15 21:40:10,880 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:40:10,880 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:40:10,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-02-15 21:40:11,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:40:11,089 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:40:11,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:40:11,089 INFO L85 PathProgramCache]: Analyzing trace with hash -152078404, now seen corresponding path program 9 times [2023-02-15 21:40:11,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:40:11,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985374501] [2023-02-15 21:40:11,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:40:11,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:40:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:11,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:40:11,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:11,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:40:11,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:11,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:40:11,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:11,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:40:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:11,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:40:11,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:11,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:11,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:11,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:11,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:11,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:11,557 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 13 proven. 49 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-15 21:40:11,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:40:11,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985374501] [2023-02-15 21:40:11,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985374501] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:40:11,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892432801] [2023-02-15 21:40:11,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:40:11,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:40:11,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:40:11,559 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:40:11,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-02-15 21:40:12,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-15 21:40:12,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:40:12,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-15 21:40:12,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:40:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 13 proven. 49 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-15 21:40:12,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:40:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 21:40:14,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892432801] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:40:14,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:40:14,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 26] total 47 [2023-02-15 21:40:14,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431468223] [2023-02-15 21:40:14,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:40:14,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-15 21:40:14,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:40:14,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-15 21:40:14,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2010, Unknown=0, NotChecked=0, Total=2162 [2023-02-15 21:40:14,488 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 47 states, 42 states have (on average 2.261904761904762) internal successors, (95), 38 states have internal predecessors, (95), 18 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (25), 14 states have call predecessors, (25), 18 states have call successors, (25) [2023-02-15 21:40:15,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:40:15,124 INFO L93 Difference]: Finished difference Result 98 states and 121 transitions. [2023-02-15 21:40:15,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 21:40:15,124 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 42 states have (on average 2.261904761904762) internal successors, (95), 38 states have internal predecessors, (95), 18 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (25), 14 states have call predecessors, (25), 18 states have call successors, (25) Word has length 73 [2023-02-15 21:40:15,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:40:15,125 INFO L225 Difference]: With dead ends: 98 [2023-02-15 21:40:15,125 INFO L226 Difference]: Without dead ends: 89 [2023-02-15 21:40:15,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 119 SyntacticMatches, 16 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=350, Invalid=3190, Unknown=0, NotChecked=0, Total=3540 [2023-02-15 21:40:15,126 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 75 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:40:15,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 682 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:40:15,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-15 21:40:15,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2023-02-15 21:40:15,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 55 states have internal predecessors, (59), 9 states have call successors, (9), 4 states have call predecessors, (9), 14 states have return successors, (25), 17 states have call predecessors, (25), 9 states have call successors, (25) [2023-02-15 21:40:15,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2023-02-15 21:40:15,130 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 73 [2023-02-15 21:40:15,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:40:15,130 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2023-02-15 21:40:15,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 42 states have (on average 2.261904761904762) internal successors, (95), 38 states have internal predecessors, (95), 18 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (25), 14 states have call predecessors, (25), 18 states have call successors, (25) [2023-02-15 21:40:15,130 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2023-02-15 21:40:15,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-15 21:40:15,130 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:40:15,131 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:40:15,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-02-15 21:40:15,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:40:15,337 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:40:15,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:40:15,337 INFO L85 PathProgramCache]: Analyzing trace with hash 867896604, now seen corresponding path program 42 times [2023-02-15 21:40:15,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:40:15,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539093222] [2023-02-15 21:40:15,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:40:15,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:40:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:15,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:40:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:15,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:40:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:15,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:40:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:15,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:40:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:15,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:40:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:15,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:15,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:15,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:15,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:15,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:15,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:15,758 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-15 21:40:15,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:40:15,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539093222] [2023-02-15 21:40:15,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539093222] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:40:15,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761196566] [2023-02-15 21:40:15,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 21:40:15,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:40:15,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:40:15,760 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:40:15,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-02-15 21:40:16,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-15 21:40:16,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:40:16,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-15 21:40:16,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:40:16,839 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-15 21:40:16,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:40:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 21:40:18,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761196566] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:40:18,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:40:18,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 25] total 36 [2023-02-15 21:40:18,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379022274] [2023-02-15 21:40:18,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:40:18,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-15 21:40:18,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:40:18,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-15 21:40:18,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 21:40:18,691 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand has 36 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 30 states have internal predecessors, (88), 15 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (23), 11 states have call predecessors, (23), 15 states have call successors, (23) [2023-02-15 21:40:19,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:40:19,070 INFO L93 Difference]: Finished difference Result 108 states and 133 transitions. [2023-02-15 21:40:19,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 21:40:19,070 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 30 states have internal predecessors, (88), 15 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (23), 11 states have call predecessors, (23), 15 states have call successors, (23) Word has length 73 [2023-02-15 21:40:19,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:40:19,071 INFO L225 Difference]: With dead ends: 108 [2023-02-15 21:40:19,071 INFO L226 Difference]: Without dead ends: 104 [2023-02-15 21:40:19,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 125 SyntacticMatches, 19 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=237, Invalid=2019, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 21:40:19,071 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 50 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:40:19,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 596 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:40:19,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-02-15 21:40:19,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 88. [2023-02-15 21:40:19,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 60 states have (on average 1.1) internal successors, (66), 62 states have internal predecessors, (66), 10 states have call successors, (10), 4 states have call predecessors, (10), 17 states have return successors, (32), 21 states have call predecessors, (32), 10 states have call successors, (32) [2023-02-15 21:40:19,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2023-02-15 21:40:19,076 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 73 [2023-02-15 21:40:19,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:40:19,076 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2023-02-15 21:40:19,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 30 states have internal predecessors, (88), 15 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (23), 11 states have call predecessors, (23), 15 states have call successors, (23) [2023-02-15 21:40:19,076 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2023-02-15 21:40:19,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-15 21:40:19,076 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:40:19,076 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:40:19,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-02-15 21:40:19,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:40:19,302 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:40:19,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:40:19,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1057895076, now seen corresponding path program 43 times [2023-02-15 21:40:19,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:40:19,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819102071] [2023-02-15 21:40:19,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:40:19,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:40:19,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:19,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:40:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:19,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:40:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:19,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:40:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:19,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:40:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:19,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:40:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:19,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:19,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:19,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:19,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:19,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-15 21:40:19,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:40:19,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819102071] [2023-02-15 21:40:19,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819102071] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:40:19,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509289980] [2023-02-15 21:40:19,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 21:40:19,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:40:19,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:40:19,688 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:40:19,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-02-15 21:40:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:20,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-15 21:40:20,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:40:20,780 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-15 21:40:20,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:40:22,821 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 21:40:22,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509289980] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:40:22,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:40:22,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 25] total 36 [2023-02-15 21:40:22,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335987278] [2023-02-15 21:40:22,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:40:22,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-15 21:40:22,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:40:22,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-15 21:40:22,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 21:40:22,822 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 36 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 30 states have internal predecessors, (88), 15 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (23), 11 states have call predecessors, (23), 15 states have call successors, (23) [2023-02-15 21:40:23,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:40:23,218 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2023-02-15 21:40:23,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 21:40:23,220 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 30 states have internal predecessors, (88), 15 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (23), 11 states have call predecessors, (23), 15 states have call successors, (23) Word has length 73 [2023-02-15 21:40:23,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:40:23,220 INFO L225 Difference]: With dead ends: 116 [2023-02-15 21:40:23,220 INFO L226 Difference]: Without dead ends: 112 [2023-02-15 21:40:23,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 125 SyntacticMatches, 19 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=237, Invalid=2019, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 21:40:23,225 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 55 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:40:23,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 612 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:40:23,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-15 21:40:23,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 92. [2023-02-15 21:40:23,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 64 states have internal predecessors, (69), 10 states have call successors, (10), 4 states have call predecessors, (10), 18 states have return successors, (34), 23 states have call predecessors, (34), 10 states have call successors, (34) [2023-02-15 21:40:23,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 113 transitions. [2023-02-15 21:40:23,259 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 113 transitions. Word has length 73 [2023-02-15 21:40:23,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:40:23,259 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 113 transitions. [2023-02-15 21:40:23,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 30 states have internal predecessors, (88), 15 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (23), 11 states have call predecessors, (23), 15 states have call successors, (23) [2023-02-15 21:40:23,259 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 113 transitions. [2023-02-15 21:40:23,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-15 21:40:23,260 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:40:23,260 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:40:23,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2023-02-15 21:40:23,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:40:23,472 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:40:23,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:40:23,472 INFO L85 PathProgramCache]: Analyzing trace with hash -37920068, now seen corresponding path program 44 times [2023-02-15 21:40:23,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:40:23,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485807407] [2023-02-15 21:40:23,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:40:23,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:40:23,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:23,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:40:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:23,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:40:23,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:23,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:40:23,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:23,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:40:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:23,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:40:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:23,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:23,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:23,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:23,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:23,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:23,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:23,981 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 47 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-15 21:40:23,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:40:23,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485807407] [2023-02-15 21:40:23,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485807407] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:40:23,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077063759] [2023-02-15 21:40:23,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:40:23,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:40:23,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:40:23,983 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:40:23,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-02-15 21:40:24,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:40:24,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:40:24,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 85 conjunts are in the unsatisfiable core [2023-02-15 21:40:24,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:40:25,303 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-15 21:40:25,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:40:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 21:40:26,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077063759] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:40:26,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:40:26,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 25] total 40 [2023-02-15 21:40:26,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134365408] [2023-02-15 21:40:26,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:40:26,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-15 21:40:26,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:40:26,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-15 21:40:26,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1442, Unknown=0, NotChecked=0, Total=1560 [2023-02-15 21:40:26,496 INFO L87 Difference]: Start difference. First operand 92 states and 113 transitions. Second operand has 40 states, 38 states have (on average 2.263157894736842) internal successors, (86), 34 states have internal predecessors, (86), 13 states have call successors, (13), 1 states have call predecessors, (13), 16 states have return successors, (24), 15 states have call predecessors, (24), 13 states have call successors, (24) [2023-02-15 21:40:27,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:40:27,138 INFO L93 Difference]: Finished difference Result 116 states and 146 transitions. [2023-02-15 21:40:27,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 21:40:27,139 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 2.263157894736842) internal successors, (86), 34 states have internal predecessors, (86), 13 states have call successors, (13), 1 states have call predecessors, (13), 16 states have return successors, (24), 15 states have call predecessors, (24), 13 states have call successors, (24) Word has length 73 [2023-02-15 21:40:27,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:40:27,139 INFO L225 Difference]: With dead ends: 116 [2023-02-15 21:40:27,140 INFO L226 Difference]: Without dead ends: 107 [2023-02-15 21:40:27,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 118 SyntacticMatches, 24 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=312, Invalid=2550, Unknown=0, NotChecked=0, Total=2862 [2023-02-15 21:40:27,140 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 29 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:40:27,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 534 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:40:27,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-15 21:40:27,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 96. [2023-02-15 21:40:27,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 66 states have internal predecessors, (72), 10 states have call successors, (10), 4 states have call predecessors, (10), 19 states have return successors, (36), 25 states have call predecessors, (36), 10 states have call successors, (36) [2023-02-15 21:40:27,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2023-02-15 21:40:27,148 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 73 [2023-02-15 21:40:27,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:40:27,148 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2023-02-15 21:40:27,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 2.263157894736842) internal successors, (86), 34 states have internal predecessors, (86), 13 states have call successors, (13), 1 states have call predecessors, (13), 16 states have return successors, (24), 15 states have call predecessors, (24), 13 states have call successors, (24) [2023-02-15 21:40:27,148 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2023-02-15 21:40:27,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-02-15 21:40:27,149 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:40:27,149 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:40:27,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-02-15 21:40:27,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-02-15 21:40:27,359 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:40:27,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:40:27,359 INFO L85 PathProgramCache]: Analyzing trace with hash -368383512, now seen corresponding path program 10 times [2023-02-15 21:40:27,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:40:27,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43356478] [2023-02-15 21:40:27,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:40:27,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:40:27,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:27,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:40:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:27,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:40:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:27,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:40:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:27,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:40:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:27,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:40:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:27,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 21:40:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:27,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:27,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:27,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:27,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:27,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:27,841 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 14 proven. 52 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-15 21:40:27,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:40:27,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43356478] [2023-02-15 21:40:27,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43356478] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:40:27,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457197141] [2023-02-15 21:40:27,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 21:40:27,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:40:27,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:40:27,843 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:40:27,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-02-15 21:40:28,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 21:40:28,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:40:28,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 51 conjunts are in the unsatisfiable core [2023-02-15 21:40:28,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:40:29,048 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 14 proven. 52 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-15 21:40:29,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:40:31,880 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-15 21:40:31,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457197141] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:40:31,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:40:31,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 28] total 41 [2023-02-15 21:40:31,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352726953] [2023-02-15 21:40:31,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:40:31,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-15 21:40:31,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:40:31,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-15 21:40:31,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1521, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 21:40:31,882 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand has 41 states, 40 states have (on average 2.35) internal successors, (94), 33 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (26), 13 states have call predecessors, (26), 16 states have call successors, (26) [2023-02-15 21:40:32,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:40:32,515 INFO L93 Difference]: Finished difference Result 126 states and 158 transitions. [2023-02-15 21:40:32,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 21:40:32,515 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.35) internal successors, (94), 33 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (26), 13 states have call predecessors, (26), 16 states have call successors, (26) Word has length 81 [2023-02-15 21:40:32,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:40:32,516 INFO L225 Difference]: With dead ends: 126 [2023-02-15 21:40:32,516 INFO L226 Difference]: Without dead ends: 122 [2023-02-15 21:40:32,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 139 SyntacticMatches, 20 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=284, Invalid=2686, Unknown=0, NotChecked=0, Total=2970 [2023-02-15 21:40:32,517 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 80 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 21:40:32,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 730 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 21:40:32,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-02-15 21:40:32,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 98. [2023-02-15 21:40:32,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 68 states have internal predecessors, (73), 10 states have call successors, (10), 4 states have call predecessors, (10), 20 states have return successors, (38), 25 states have call predecessors, (38), 10 states have call successors, (38) [2023-02-15 21:40:32,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2023-02-15 21:40:32,522 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 81 [2023-02-15 21:40:32,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:40:32,523 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2023-02-15 21:40:32,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.35) internal successors, (94), 33 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (26), 13 states have call predecessors, (26), 16 states have call successors, (26) [2023-02-15 21:40:32,523 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2023-02-15 21:40:32,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-02-15 21:40:32,523 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:40:32,523 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:40:32,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-02-15 21:40:32,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-02-15 21:40:32,733 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:40:32,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:40:32,733 INFO L85 PathProgramCache]: Analyzing trace with hash -336766392, now seen corresponding path program 45 times [2023-02-15 21:40:32,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:40:32,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109444548] [2023-02-15 21:40:32,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:40:32,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:40:32,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:32,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:40:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:32,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:40:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:32,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:40:32,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:33,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:40:33,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:33,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:40:33,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:33,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 21:40:33,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:33,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:33,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:33,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:33,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:33,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:33,313 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-15 21:40:33,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:40:33,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109444548] [2023-02-15 21:40:33,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109444548] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:40:33,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598315730] [2023-02-15 21:40:33,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:40:33,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:40:33,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:40:33,315 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:40:33,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-02-15 21:40:34,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-15 21:40:34,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:40:34,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-15 21:40:34,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:40:34,568 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-15 21:40:34,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:40:36,606 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 21:40:36,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598315730] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:40:36,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:40:36,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 27] total 49 [2023-02-15 21:40:36,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113449868] [2023-02-15 21:40:36,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:40:36,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-15 21:40:36,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:40:36,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-15 21:40:36,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2195, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 21:40:36,608 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand has 49 states, 44 states have (on average 2.272727272727273) internal successors, (100), 38 states have internal predecessors, (100), 18 states have call successors, (21), 1 states have call predecessors, (21), 14 states have return successors, (28), 16 states have call predecessors, (28), 18 states have call successors, (28) [2023-02-15 21:40:37,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:40:37,433 INFO L93 Difference]: Finished difference Result 120 states and 151 transitions. [2023-02-15 21:40:37,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 21:40:37,433 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 44 states have (on average 2.272727272727273) internal successors, (100), 38 states have internal predecessors, (100), 18 states have call successors, (21), 1 states have call predecessors, (21), 14 states have return successors, (28), 16 states have call predecessors, (28), 18 states have call successors, (28) Word has length 81 [2023-02-15 21:40:37,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:40:37,434 INFO L225 Difference]: With dead ends: 120 [2023-02-15 21:40:37,434 INFO L226 Difference]: Without dead ends: 111 [2023-02-15 21:40:37,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 134 SyntacticMatches, 19 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=367, Invalid=3539, Unknown=0, NotChecked=0, Total=3906 [2023-02-15 21:40:37,434 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 83 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 21:40:37,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 687 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 21:40:37,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-02-15 21:40:37,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2023-02-15 21:40:37,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 66 states have internal predecessors, (72), 10 states have call successors, (10), 4 states have call predecessors, (10), 19 states have return successors, (36), 25 states have call predecessors, (36), 10 states have call successors, (36) [2023-02-15 21:40:37,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2023-02-15 21:40:37,439 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 81 [2023-02-15 21:40:37,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:40:37,440 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2023-02-15 21:40:37,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 44 states have (on average 2.272727272727273) internal successors, (100), 38 states have internal predecessors, (100), 18 states have call successors, (21), 1 states have call predecessors, (21), 14 states have return successors, (28), 16 states have call predecessors, (28), 18 states have call successors, (28) [2023-02-15 21:40:37,440 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2023-02-15 21:40:37,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-02-15 21:40:37,441 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:40:37,441 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:40:37,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-02-15 21:40:37,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:40:37,651 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:40:37,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:40:37,652 INFO L85 PathProgramCache]: Analyzing trace with hash -810209656, now seen corresponding path program 46 times [2023-02-15 21:40:37,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:40:37,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531265733] [2023-02-15 21:40:37,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:40:37,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:40:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:37,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 21:40:37,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:37,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:40:37,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:37,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:40:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:37,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:40:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:37,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:40:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:38,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 21:40:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:38,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:38,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:38,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:38,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:38,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:38,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:40:38,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:40:38,250 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 20 proven. 48 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-15 21:40:38,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:40:38,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531265733] [2023-02-15 21:40:38,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531265733] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:40:38,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797949354] [2023-02-15 21:40:38,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 21:40:38,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:40:38,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:40:38,253 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:40:38,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-02-15 21:40:39,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 21:40:39,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:40:39,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-15 21:40:39,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:40:39,809 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 13 proven. 49 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-02-15 21:40:39,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:40:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-15 21:40:44,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797949354] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:40:44,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:40:44,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 29] total 60 [2023-02-15 21:40:44,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737596106] [2023-02-15 21:40:44,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:40:44,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-15 21:40:44,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:40:44,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-15 21:40:44,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3348, Unknown=0, NotChecked=0, Total=3540 [2023-02-15 21:40:44,999 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand has 60 states, 54 states have (on average 2.111111111111111) internal successors, (114), 45 states have internal predecessors, (114), 22 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (30), 20 states have call predecessors, (30), 22 states have call successors, (30) [2023-02-15 21:40:46,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:40:46,139 INFO L93 Difference]: Finished difference Result 157 states and 203 transitions. [2023-02-15 21:40:46,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-15 21:40:46,140 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 54 states have (on average 2.111111111111111) internal successors, (114), 45 states have internal predecessors, (114), 22 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (30), 20 states have call predecessors, (30), 22 states have call successors, (30) Word has length 81 [2023-02-15 21:40:46,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:40:46,141 INFO L225 Difference]: With dead ends: 157 [2023-02-15 21:40:46,141 INFO L226 Difference]: Without dead ends: 153 [2023-02-15 21:40:46,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 132 SyntacticMatches, 10 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=414, Invalid=5136, Unknown=0, NotChecked=0, Total=5550 [2023-02-15 21:40:46,142 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 116 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 1616 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 21:40:46,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 993 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1616 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 21:40:46,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-02-15 21:40:46,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 116. [2023-02-15 21:40:46,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 80 states have (on average 1.075) internal successors, (86), 78 states have internal predecessors, (86), 10 states have call successors, (10), 4 states have call predecessors, (10), 25 states have return successors, (52), 33 states have call predecessors, (52), 10 states have call successors, (52) [2023-02-15 21:40:46,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 148 transitions. [2023-02-15 21:40:46,148 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 148 transitions. Word has length 81 [2023-02-15 21:40:46,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:40:46,148 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 148 transitions. [2023-02-15 21:40:46,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 54 states have (on average 2.111111111111111) internal successors, (114), 45 states have internal predecessors, (114), 22 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (30), 20 states have call predecessors, (30), 22 states have call successors, (30) [2023-02-15 21:40:46,149 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 148 transitions. [2023-02-15 21:40:46,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-02-15 21:40:46,149 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:40:46,149 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:40:46,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0