./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/seq-mthreaded/pals_lcr.4.1.ufo.UNBOUNDED.pals.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 50b0a90f24476d3b8404a11c5a11650cef36326e0b80eb9bfd0bc8b7617d7b0d --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 18:25:12,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 18:25:12,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 18:25:12,325 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 18:25:12,329 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 18:25:12,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 18:25:12,331 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 18:25:12,332 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 18:25:12,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 18:25:12,334 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 18:25:12,334 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 18:25:12,335 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 18:25:12,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 18:25:12,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 18:25:12,337 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 18:25:12,338 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 18:25:12,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 18:25:12,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 18:25:12,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 18:25:12,347 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 18:25:12,350 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 18:25:12,352 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 18:25:12,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 18:25:12,353 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 18:25:12,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 18:25:12,360 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 18:25:12,362 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 18:25:12,363 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 18:25:12,364 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 18:25:12,364 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 18:25:12,365 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 18:25:12,366 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 18:25:12,366 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 18:25:12,367 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 18:25:12,368 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 18:25:12,368 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 18:25:12,368 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 18:25:12,369 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 18:25:12,369 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 18:25:12,370 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 18:25:12,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 18:25:12,371 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 18:25:12,372 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 18:25:12,396 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 18:25:12,396 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 18:25:12,396 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 18:25:12,396 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 18:25:12,397 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 18:25:12,397 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 18:25:12,398 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 18:25:12,398 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 18:25:12,398 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 18:25:12,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 18:25:12,398 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 18:25:12,399 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 18:25:12,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 18:25:12,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 18:25:12,399 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 18:25:12,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 18:25:12,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 18:25:12,400 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 18:25:12,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 18:25:12,400 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 18:25:12,400 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 18:25:12,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 18:25:12,400 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 18:25:12,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 18:25:12,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 18:25:12,401 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 18:25:12,401 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 18:25:12,401 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 18:25:12,401 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 18:25:12,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 18:25:12,402 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 18:25:12,402 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 18:25:12,402 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 18:25:12,402 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 50b0a90f24476d3b8404a11c5a11650cef36326e0b80eb9bfd0bc8b7617d7b0d [2022-07-13 18:25:12,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 18:25:12,596 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 18:25:12,598 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 18:25:12,599 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 18:25:12,599 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 18:25:12,601 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.UNBOUNDED.pals.c [2022-07-13 18:25:12,659 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cabd9808/af8db8ccdba74c689d95937b213e22a3/FLAG971c731f4 [2022-07-13 18:25:12,984 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 18:25:12,985 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.UNBOUNDED.pals.c [2022-07-13 18:25:12,994 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cabd9808/af8db8ccdba74c689d95937b213e22a3/FLAG971c731f4 [2022-07-13 18:25:13,408 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cabd9808/af8db8ccdba74c689d95937b213e22a3 [2022-07-13 18:25:13,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 18:25:13,411 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 18:25:13,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 18:25:13,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 18:25:13,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 18:25:13,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:25:13" (1/1) ... [2022-07-13 18:25:13,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27e645ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:13, skipping insertion in model container [2022-07-13 18:25:13,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:25:13" (1/1) ... [2022-07-13 18:25:13,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 18:25:13,449 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 18:25:13,629 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.UNBOUNDED.pals.c[8342,8355] [2022-07-13 18:25:13,633 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 18:25:13,648 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 18:25:13,702 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.UNBOUNDED.pals.c[8342,8355] [2022-07-13 18:25:13,703 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 18:25:13,719 INFO L208 MainTranslator]: Completed translation [2022-07-13 18:25:13,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:13 WrapperNode [2022-07-13 18:25:13,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 18:25:13,721 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 18:25:13,721 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 18:25:13,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 18:25:13,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:13" (1/1) ... [2022-07-13 18:25:13,737 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:13" (1/1) ... [2022-07-13 18:25:13,754 INFO L137 Inliner]: procedures = 24, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 275 [2022-07-13 18:25:13,755 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 18:25:13,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 18:25:13,759 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 18:25:13,759 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 18:25:13,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:13" (1/1) ... [2022-07-13 18:25:13,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:13" (1/1) ... [2022-07-13 18:25:13,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:13" (1/1) ... [2022-07-13 18:25:13,774 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:13" (1/1) ... [2022-07-13 18:25:13,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:13" (1/1) ... [2022-07-13 18:25:13,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:13" (1/1) ... [2022-07-13 18:25:13,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:13" (1/1) ... [2022-07-13 18:25:13,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 18:25:13,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 18:25:13,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 18:25:13,794 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 18:25:13,795 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:13" (1/1) ... [2022-07-13 18:25:13,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 18:25:13,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:25:13,820 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) [2022-07-13 18:25:13,822 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 [2022-07-13 18:25:13,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 18:25:13,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 18:25:13,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 18:25:13,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 18:25:13,909 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 18:25:13,910 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 18:25:14,217 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 18:25:14,222 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 18:25:14,224 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 18:25:14,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:25:14 BoogieIcfgContainer [2022-07-13 18:25:14,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 18:25:14,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 18:25:14,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 18:25:14,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 18:25:14,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 06:25:13" (1/3) ... [2022-07-13 18:25:14,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bdc699b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:25:14, skipping insertion in model container [2022-07-13 18:25:14,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:13" (2/3) ... [2022-07-13 18:25:14,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bdc699b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:25:14, skipping insertion in model container [2022-07-13 18:25:14,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:25:14" (3/3) ... [2022-07-13 18:25:14,234 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals.c [2022-07-13 18:25:14,244 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 18:25:14,244 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 18:25:14,295 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 18:25:14,303 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@517aa2ab, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@220e1865 [2022-07-13 18:25:14,303 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 18:25:14,306 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 77 states have (on average 1.7012987012987013) internal successors, (131), 78 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:14,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-13 18:25:14,311 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:14,312 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:14,312 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:14,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:14,316 INFO L85 PathProgramCache]: Analyzing trace with hash -171388107, now seen corresponding path program 1 times [2022-07-13 18:25:14,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:14,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772049175] [2022-07-13 18:25:14,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:14,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:14,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:14,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:14,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772049175] [2022-07-13 18:25:14,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772049175] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:14,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:14,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 18:25:14,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951197710] [2022-07-13 18:25:14,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:14,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 18:25:14,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:14,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 18:25:14,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 18:25:14,485 INFO L87 Difference]: Start difference. First operand has 79 states, 77 states have (on average 1.7012987012987013) internal successors, (131), 78 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:14,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:14,507 INFO L93 Difference]: Finished difference Result 126 states and 207 transitions. [2022-07-13 18:25:14,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 18:25:14,509 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-13 18:25:14,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:14,517 INFO L225 Difference]: With dead ends: 126 [2022-07-13 18:25:14,517 INFO L226 Difference]: Without dead ends: 75 [2022-07-13 18:25:14,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 18:25:14,523 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:14,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:14,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-13 18:25:14,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-07-13 18:25:14,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.6756756756756757) internal successors, (124), 74 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:14,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 124 transitions. [2022-07-13 18:25:14,559 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 124 transitions. Word has length 29 [2022-07-13 18:25:14,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:14,560 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 124 transitions. [2022-07-13 18:25:14,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:14,560 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 124 transitions. [2022-07-13 18:25:14,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-13 18:25:14,562 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:14,562 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:14,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 18:25:14,562 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:14,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:14,563 INFO L85 PathProgramCache]: Analyzing trace with hash -305401613, now seen corresponding path program 1 times [2022-07-13 18:25:14,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:14,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340933552] [2022-07-13 18:25:14,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:14,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:14,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:14,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:14,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340933552] [2022-07-13 18:25:14,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340933552] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:14,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:14,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 18:25:14,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277558722] [2022-07-13 18:25:14,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:14,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:25:14,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:14,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:25:14,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:25:14,656 INFO L87 Difference]: Start difference. First operand 75 states and 124 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:14,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:14,729 INFO L93 Difference]: Finished difference Result 125 states and 200 transitions. [2022-07-13 18:25:14,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 18:25:14,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-13 18:25:14,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:14,730 INFO L225 Difference]: With dead ends: 125 [2022-07-13 18:25:14,731 INFO L226 Difference]: Without dead ends: 75 [2022-07-13 18:25:14,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:25:14,732 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 3 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:14,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 462 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:14,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-13 18:25:14,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-07-13 18:25:14,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.364864864864865) internal successors, (101), 74 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:14,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2022-07-13 18:25:14,737 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 29 [2022-07-13 18:25:14,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:14,737 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 101 transitions. [2022-07-13 18:25:14,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:14,738 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 101 transitions. [2022-07-13 18:25:14,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-13 18:25:14,739 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:14,739 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, 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, 1, 1, 1] [2022-07-13 18:25:14,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 18:25:14,739 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:14,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:14,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1295954354, now seen corresponding path program 1 times [2022-07-13 18:25:14,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:14,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947803596] [2022-07-13 18:25:14,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:14,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:14,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:14,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:14,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947803596] [2022-07-13 18:25:14,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947803596] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:14,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:14,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:25:14,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310412953] [2022-07-13 18:25:14,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:14,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:25:14,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:14,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:25:14,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:14,825 INFO L87 Difference]: Start difference. First operand 75 states and 101 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:14,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:14,867 INFO L93 Difference]: Finished difference Result 161 states and 235 transitions. [2022-07-13 18:25:14,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:25:14,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-07-13 18:25:14,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:14,872 INFO L225 Difference]: With dead ends: 161 [2022-07-13 18:25:14,873 INFO L226 Difference]: Without dead ends: 115 [2022-07-13 18:25:14,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:14,874 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 58 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:14,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 217 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:14,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-13 18:25:14,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2022-07-13 18:25:14,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.4375) internal successors, (161), 112 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:14,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 161 transitions. [2022-07-13 18:25:14,885 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 161 transitions. Word has length 51 [2022-07-13 18:25:14,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:14,886 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 161 transitions. [2022-07-13 18:25:14,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:14,886 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 161 transitions. [2022-07-13 18:25:14,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-13 18:25:14,887 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:14,887 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, 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, 1, 1, 1] [2022-07-13 18:25:14,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 18:25:14,887 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:14,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:14,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1404728260, now seen corresponding path program 1 times [2022-07-13 18:25:14,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:14,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400001604] [2022-07-13 18:25:14,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:14,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:14,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:14,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400001604] [2022-07-13 18:25:14,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400001604] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:14,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:14,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:25:14,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273603052] [2022-07-13 18:25:14,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:14,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:25:14,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:14,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:25:14,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:14,963 INFO L87 Difference]: Start difference. First operand 113 states and 161 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:14,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:14,986 INFO L93 Difference]: Finished difference Result 269 states and 405 transitions. [2022-07-13 18:25:14,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:25:14,987 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-07-13 18:25:14,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:14,988 INFO L225 Difference]: With dead ends: 269 [2022-07-13 18:25:14,989 INFO L226 Difference]: Without dead ends: 185 [2022-07-13 18:25:14,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:14,993 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 54 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:14,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 216 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:14,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-13 18:25:15,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2022-07-13 18:25:15,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.4835164835164836) internal successors, (270), 182 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:15,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 270 transitions. [2022-07-13 18:25:15,008 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 270 transitions. Word has length 51 [2022-07-13 18:25:15,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:15,009 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 270 transitions. [2022-07-13 18:25:15,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:15,010 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 270 transitions. [2022-07-13 18:25:15,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-13 18:25:15,010 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:15,011 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, 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, 1, 1, 1] [2022-07-13 18:25:15,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 18:25:15,011 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:15,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:15,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1742521402, now seen corresponding path program 1 times [2022-07-13 18:25:15,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:15,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665610041] [2022-07-13 18:25:15,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:15,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:15,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:15,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:15,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:15,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665610041] [2022-07-13 18:25:15,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665610041] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:15,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:15,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 18:25:15,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060750311] [2022-07-13 18:25:15,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:15,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 18:25:15,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:15,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 18:25:15,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:25:15,083 INFO L87 Difference]: Start difference. First operand 183 states and 270 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:15,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:15,230 INFO L93 Difference]: Finished difference Result 1415 states and 2198 transitions. [2022-07-13 18:25:15,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 18:25:15,230 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-07-13 18:25:15,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:15,236 INFO L225 Difference]: With dead ends: 1415 [2022-07-13 18:25:15,237 INFO L226 Difference]: Without dead ends: 1261 [2022-07-13 18:25:15,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-13 18:25:15,239 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 761 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:15,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [761 Valid, 862 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:25:15,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2022-07-13 18:25:15,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 335. [2022-07-13 18:25:15,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 1.5029940119760479) internal successors, (502), 334 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:15,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 502 transitions. [2022-07-13 18:25:15,265 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 502 transitions. Word has length 51 [2022-07-13 18:25:15,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:15,265 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 502 transitions. [2022-07-13 18:25:15,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:15,266 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 502 transitions. [2022-07-13 18:25:15,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-13 18:25:15,266 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:15,267 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, 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, 1, 1, 1, 1, 1] [2022-07-13 18:25:15,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 18:25:15,267 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:15,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:15,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1889876246, now seen corresponding path program 1 times [2022-07-13 18:25:15,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:15,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685297979] [2022-07-13 18:25:15,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:15,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:15,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:15,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:15,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685297979] [2022-07-13 18:25:15,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685297979] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:15,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:15,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:25:15,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38536946] [2022-07-13 18:25:15,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:15,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:25:15,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:15,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:25:15,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:15,329 INFO L87 Difference]: Start difference. First operand 335 states and 502 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:15,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:15,390 INFO L93 Difference]: Finished difference Result 903 states and 1372 transitions. [2022-07-13 18:25:15,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:25:15,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-13 18:25:15,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:15,394 INFO L225 Difference]: With dead ends: 903 [2022-07-13 18:25:15,394 INFO L226 Difference]: Without dead ends: 597 [2022-07-13 18:25:15,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:15,399 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 41 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:15,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 162 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:15,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-07-13 18:25:15,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 587. [2022-07-13 18:25:15,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 1.484641638225256) internal successors, (870), 586 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:15,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 870 transitions. [2022-07-13 18:25:15,443 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 870 transitions. Word has length 53 [2022-07-13 18:25:15,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:15,444 INFO L495 AbstractCegarLoop]: Abstraction has 587 states and 870 transitions. [2022-07-13 18:25:15,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:15,444 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 870 transitions. [2022-07-13 18:25:15,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-13 18:25:15,447 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:15,447 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, 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, 1, 1, 1, 1, 1] [2022-07-13 18:25:15,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 18:25:15,448 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:15,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:15,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1823382734, now seen corresponding path program 1 times [2022-07-13 18:25:15,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:15,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596005418] [2022-07-13 18:25:15,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:15,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:15,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:15,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596005418] [2022-07-13 18:25:15,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596005418] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:15,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:15,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 18:25:15,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904651519] [2022-07-13 18:25:15,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:15,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 18:25:15,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:15,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 18:25:15,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:25:15,572 INFO L87 Difference]: Start difference. First operand 587 states and 870 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:15,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:15,671 INFO L93 Difference]: Finished difference Result 1147 states and 1712 transitions. [2022-07-13 18:25:15,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 18:25:15,672 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-13 18:25:15,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:15,674 INFO L225 Difference]: With dead ends: 1147 [2022-07-13 18:25:15,674 INFO L226 Difference]: Without dead ends: 589 [2022-07-13 18:25:15,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-13 18:25:15,676 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 154 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:15,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 391 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:15,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-07-13 18:25:15,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 587. [2022-07-13 18:25:15,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 1.47098976109215) internal successors, (862), 586 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:15,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 862 transitions. [2022-07-13 18:25:15,703 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 862 transitions. Word has length 53 [2022-07-13 18:25:15,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:15,704 INFO L495 AbstractCegarLoop]: Abstraction has 587 states and 862 transitions. [2022-07-13 18:25:15,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:15,704 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 862 transitions. [2022-07-13 18:25:15,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-13 18:25:15,706 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:15,706 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, 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, 1, 1, 1, 1, 1] [2022-07-13 18:25:15,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 18:25:15,707 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:15,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:15,707 INFO L85 PathProgramCache]: Analyzing trace with hash -34468658, now seen corresponding path program 1 times [2022-07-13 18:25:15,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:15,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252931072] [2022-07-13 18:25:15,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:15,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:15,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:15,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:15,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252931072] [2022-07-13 18:25:15,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252931072] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:15,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:15,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:25:15,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556100768] [2022-07-13 18:25:15,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:15,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:25:15,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:15,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:25:15,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:15,758 INFO L87 Difference]: Start difference. First operand 587 states and 862 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:15,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:15,819 INFO L93 Difference]: Finished difference Result 1607 states and 2368 transitions. [2022-07-13 18:25:15,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:25:15,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-13 18:25:15,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:15,822 INFO L225 Difference]: With dead ends: 1607 [2022-07-13 18:25:15,823 INFO L226 Difference]: Without dead ends: 1049 [2022-07-13 18:25:15,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:15,824 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 50 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:15,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 216 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:15,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2022-07-13 18:25:15,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 1047. [2022-07-13 18:25:15,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 1.4512428298279159) internal successors, (1518), 1046 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:15,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1518 transitions. [2022-07-13 18:25:15,870 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1518 transitions. Word has length 53 [2022-07-13 18:25:15,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:15,870 INFO L495 AbstractCegarLoop]: Abstraction has 1047 states and 1518 transitions. [2022-07-13 18:25:15,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:15,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1518 transitions. [2022-07-13 18:25:15,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-13 18:25:15,871 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:15,871 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, 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, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:15,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 18:25:15,872 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:15,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:15,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1105013027, now seen corresponding path program 1 times [2022-07-13 18:25:15,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:15,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649851671] [2022-07-13 18:25:15,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:15,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:15,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:15,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:15,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649851671] [2022-07-13 18:25:15,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649851671] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:15,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:15,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 18:25:15,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532785239] [2022-07-13 18:25:15,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:15,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 18:25:15,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:15,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 18:25:15,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 18:25:15,934 INFO L87 Difference]: Start difference. First operand 1047 states and 1518 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:16,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:16,134 INFO L93 Difference]: Finished difference Result 1817 states and 2619 transitions. [2022-07-13 18:25:16,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 18:25:16,135 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-13 18:25:16,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:16,140 INFO L225 Difference]: With dead ends: 1817 [2022-07-13 18:25:16,140 INFO L226 Difference]: Without dead ends: 1815 [2022-07-13 18:25:16,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-07-13 18:25:16,143 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 498 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:16,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 506 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:16,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2022-07-13 18:25:16,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1095. [2022-07-13 18:25:16,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 1094 states have (on average 1.4241316270566728) internal successors, (1558), 1094 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:16,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1558 transitions. [2022-07-13 18:25:16,222 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1558 transitions. Word has length 54 [2022-07-13 18:25:16,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:16,225 INFO L495 AbstractCegarLoop]: Abstraction has 1095 states and 1558 transitions. [2022-07-13 18:25:16,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:16,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1558 transitions. [2022-07-13 18:25:16,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-13 18:25:16,226 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:16,226 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, 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:16,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 18:25:16,226 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:16,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:16,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1044582089, now seen corresponding path program 1 times [2022-07-13 18:25:16,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:16,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341201593] [2022-07-13 18:25:16,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:16,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:16,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:16,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341201593] [2022-07-13 18:25:16,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341201593] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:16,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:16,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:25:16,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329055591] [2022-07-13 18:25:16,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:16,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:25:16,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:16,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:25:16,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:16,257 INFO L87 Difference]: Start difference. First operand 1095 states and 1558 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:16,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:16,353 INFO L93 Difference]: Finished difference Result 2190 states and 3148 transitions. [2022-07-13 18:25:16,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:25:16,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-13 18:25:16,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:16,358 INFO L225 Difference]: With dead ends: 2190 [2022-07-13 18:25:16,358 INFO L226 Difference]: Without dead ends: 1579 [2022-07-13 18:25:16,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:16,360 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 59 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:16,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 222 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:16,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2022-07-13 18:25:16,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1577. [2022-07-13 18:25:16,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1576 states have (on average 1.416243654822335) internal successors, (2232), 1576 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:16,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 2232 transitions. [2022-07-13 18:25:16,455 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 2232 transitions. Word has length 55 [2022-07-13 18:25:16,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:16,455 INFO L495 AbstractCegarLoop]: Abstraction has 1577 states and 2232 transitions. [2022-07-13 18:25:16,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:16,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 2232 transitions. [2022-07-13 18:25:16,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-13 18:25:16,456 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:16,457 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:16,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 18:25:16,457 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:16,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:16,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1276698888, now seen corresponding path program 1 times [2022-07-13 18:25:16,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:16,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128650616] [2022-07-13 18:25:16,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:16,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:16,522 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 18:25:16,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:16,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128650616] [2022-07-13 18:25:16,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128650616] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:16,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:16,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 18:25:16,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055908535] [2022-07-13 18:25:16,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:16,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 18:25:16,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:16,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 18:25:16,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:25:16,525 INFO L87 Difference]: Start difference. First operand 1577 states and 2232 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:16,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:16,921 INFO L93 Difference]: Finished difference Result 8083 states and 11473 transitions. [2022-07-13 18:25:16,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 18:25:16,922 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-07-13 18:25:16,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:16,944 INFO L225 Difference]: With dead ends: 8083 [2022-07-13 18:25:16,945 INFO L226 Difference]: Without dead ends: 6537 [2022-07-13 18:25:16,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-13 18:25:16,950 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 467 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:16,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 493 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:16,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6537 states. [2022-07-13 18:25:17,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6537 to 3121. [2022-07-13 18:25:17,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3121 states, 3120 states have (on average 1.412820512820513) internal successors, (4408), 3120 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:17,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3121 states to 3121 states and 4408 transitions. [2022-07-13 18:25:17,188 INFO L78 Accepts]: Start accepts. Automaton has 3121 states and 4408 transitions. Word has length 78 [2022-07-13 18:25:17,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:17,189 INFO L495 AbstractCegarLoop]: Abstraction has 3121 states and 4408 transitions. [2022-07-13 18:25:17,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:17,189 INFO L276 IsEmpty]: Start isEmpty. Operand 3121 states and 4408 transitions. [2022-07-13 18:25:17,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-13 18:25:17,193 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:17,193 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:17,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 18:25:17,194 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:17,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:17,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1827496306, now seen corresponding path program 1 times [2022-07-13 18:25:17,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:17,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629882081] [2022-07-13 18:25:17,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:17,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:17,254 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 18:25:17,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:17,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629882081] [2022-07-13 18:25:17,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629882081] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:17,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:17,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 18:25:17,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191001782] [2022-07-13 18:25:17,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:17,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 18:25:17,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:17,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 18:25:17,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:25:17,256 INFO L87 Difference]: Start difference. First operand 3121 states and 4408 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:17,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:17,760 INFO L93 Difference]: Finished difference Result 9627 states and 13649 transitions. [2022-07-13 18:25:17,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 18:25:17,761 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-07-13 18:25:17,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:17,784 INFO L225 Difference]: With dead ends: 9627 [2022-07-13 18:25:17,785 INFO L226 Difference]: Without dead ends: 8081 [2022-07-13 18:25:17,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-13 18:25:17,789 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 419 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:17,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 540 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:25:17,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8081 states. [2022-07-13 18:25:18,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8081 to 5441. [2022-07-13 18:25:18,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5441 states, 5440 states have (on average 1.4066176470588236) internal successors, (7652), 5440 states have internal predecessors, (7652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:18,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5441 states to 5441 states and 7652 transitions. [2022-07-13 18:25:18,133 INFO L78 Accepts]: Start accepts. Automaton has 5441 states and 7652 transitions. Word has length 78 [2022-07-13 18:25:18,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:18,133 INFO L495 AbstractCegarLoop]: Abstraction has 5441 states and 7652 transitions. [2022-07-13 18:25:18,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:18,134 INFO L276 IsEmpty]: Start isEmpty. Operand 5441 states and 7652 transitions. [2022-07-13 18:25:18,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-13 18:25:18,135 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:18,135 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:18,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 18:25:18,136 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:18,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:18,136 INFO L85 PathProgramCache]: Analyzing trace with hash -695856466, now seen corresponding path program 1 times [2022-07-13 18:25:18,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:18,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311280351] [2022-07-13 18:25:18,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:18,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 18:25:18,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:18,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311280351] [2022-07-13 18:25:18,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311280351] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:18,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:18,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 18:25:18,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181868153] [2022-07-13 18:25:18,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:18,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 18:25:18,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:18,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 18:25:18,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:25:18,201 INFO L87 Difference]: Start difference. First operand 5441 states and 7652 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:18,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:18,784 INFO L93 Difference]: Finished difference Result 11171 states and 15825 transitions. [2022-07-13 18:25:18,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 18:25:18,785 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-07-13 18:25:18,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:18,808 INFO L225 Difference]: With dead ends: 11171 [2022-07-13 18:25:18,808 INFO L226 Difference]: Without dead ends: 9625 [2022-07-13 18:25:18,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-13 18:25:18,814 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 453 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:18,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 557 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:18,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9625 states. [2022-07-13 18:25:19,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9625 to 6985. [2022-07-13 18:25:19,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6985 states, 6984 states have (on average 1.407216494845361) internal successors, (9828), 6984 states have internal predecessors, (9828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:19,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6985 states to 6985 states and 9828 transitions. [2022-07-13 18:25:19,201 INFO L78 Accepts]: Start accepts. Automaton has 6985 states and 9828 transitions. Word has length 78 [2022-07-13 18:25:19,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:19,202 INFO L495 AbstractCegarLoop]: Abstraction has 6985 states and 9828 transitions. [2022-07-13 18:25:19,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:19,202 INFO L276 IsEmpty]: Start isEmpty. Operand 6985 states and 9828 transitions. [2022-07-13 18:25:19,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-13 18:25:19,204 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:19,204 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:19,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 18:25:19,204 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:19,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:19,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1015584653, now seen corresponding path program 1 times [2022-07-13 18:25:19,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:19,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226911534] [2022-07-13 18:25:19,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:19,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:19,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:19,248 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 18:25:19,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:19,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226911534] [2022-07-13 18:25:19,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226911534] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:19,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:19,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 18:25:19,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607404861] [2022-07-13 18:25:19,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:19,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 18:25:19,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:19,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 18:25:19,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:25:19,251 INFO L87 Difference]: Start difference. First operand 6985 states and 9828 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:19,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:19,796 INFO L93 Difference]: Finished difference Result 11803 states and 16737 transitions. [2022-07-13 18:25:19,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 18:25:19,797 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-07-13 18:25:19,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:19,812 INFO L225 Difference]: With dead ends: 11803 [2022-07-13 18:25:19,813 INFO L226 Difference]: Without dead ends: 10713 [2022-07-13 18:25:19,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-13 18:25:19,816 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 449 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:19,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 493 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:19,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10713 states. [2022-07-13 18:25:20,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10713 to 8073. [2022-07-13 18:25:20,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8073 states, 8072 states have (on average 1.4098116947472745) internal successors, (11380), 8072 states have internal predecessors, (11380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:20,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8073 states to 8073 states and 11380 transitions. [2022-07-13 18:25:20,428 INFO L78 Accepts]: Start accepts. Automaton has 8073 states and 11380 transitions. Word has length 80 [2022-07-13 18:25:20,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:20,428 INFO L495 AbstractCegarLoop]: Abstraction has 8073 states and 11380 transitions. [2022-07-13 18:25:20,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:20,428 INFO L276 IsEmpty]: Start isEmpty. Operand 8073 states and 11380 transitions. [2022-07-13 18:25:20,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-13 18:25:20,431 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:20,431 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:20,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 18:25:20,431 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:20,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:20,432 INFO L85 PathProgramCache]: Analyzing trace with hash 103810672, now seen corresponding path program 1 times [2022-07-13 18:25:20,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:20,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392191781] [2022-07-13 18:25:20,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:20,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:20,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:20,461 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:20,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:20,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392191781] [2022-07-13 18:25:20,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392191781] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:20,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:20,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:25:20,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440046101] [2022-07-13 18:25:20,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:20,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:25:20,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:20,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:25:20,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:20,464 INFO L87 Difference]: Start difference. First operand 8073 states and 11380 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:20,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:20,847 INFO L93 Difference]: Finished difference Result 14087 states and 19949 transitions. [2022-07-13 18:25:20,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:25:20,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-07-13 18:25:20,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:20,855 INFO L225 Difference]: With dead ends: 14087 [2022-07-13 18:25:20,856 INFO L226 Difference]: Without dead ends: 6045 [2022-07-13 18:25:20,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:20,861 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 45 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:20,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 218 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:20,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6045 states. [2022-07-13 18:25:21,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6045 to 6043. [2022-07-13 18:25:21,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6043 states, 6042 states have (on average 1.408474015226746) internal successors, (8510), 6042 states have internal predecessors, (8510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:21,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6043 states to 6043 states and 8510 transitions. [2022-07-13 18:25:21,163 INFO L78 Accepts]: Start accepts. Automaton has 6043 states and 8510 transitions. Word has length 80 [2022-07-13 18:25:21,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:21,163 INFO L495 AbstractCegarLoop]: Abstraction has 6043 states and 8510 transitions. [2022-07-13 18:25:21,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:21,164 INFO L276 IsEmpty]: Start isEmpty. Operand 6043 states and 8510 transitions. [2022-07-13 18:25:21,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-13 18:25:21,165 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:21,165 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:21,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 18:25:21,165 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:21,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:21,166 INFO L85 PathProgramCache]: Analyzing trace with hash 61640365, now seen corresponding path program 1 times [2022-07-13 18:25:21,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:21,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481561522] [2022-07-13 18:25:21,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:21,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:21,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:21,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:21,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481561522] [2022-07-13 18:25:21,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481561522] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:21,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:21,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:25:21,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496887441] [2022-07-13 18:25:21,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:21,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:25:21,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:21,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:25:21,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:21,204 INFO L87 Difference]: Start difference. First operand 6043 states and 8510 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:21,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:21,366 INFO L93 Difference]: Finished difference Result 9039 states and 12736 transitions. [2022-07-13 18:25:21,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:25:21,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-07-13 18:25:21,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:21,372 INFO L225 Difference]: With dead ends: 9039 [2022-07-13 18:25:21,372 INFO L226 Difference]: Without dead ends: 3053 [2022-07-13 18:25:21,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:21,378 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 39 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:21,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 197 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:21,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3053 states. [2022-07-13 18:25:21,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3053 to 3051. [2022-07-13 18:25:21,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3051 states, 3050 states have (on average 1.3908196721311474) internal successors, (4242), 3050 states have internal predecessors, (4242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:21,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3051 states to 3051 states and 4242 transitions. [2022-07-13 18:25:21,561 INFO L78 Accepts]: Start accepts. Automaton has 3051 states and 4242 transitions. Word has length 81 [2022-07-13 18:25:21,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:21,561 INFO L495 AbstractCegarLoop]: Abstraction has 3051 states and 4242 transitions. [2022-07-13 18:25:21,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:21,561 INFO L276 IsEmpty]: Start isEmpty. Operand 3051 states and 4242 transitions. [2022-07-13 18:25:21,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-13 18:25:21,562 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:21,562 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:21,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 18:25:21,563 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:21,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:21,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1057634845, now seen corresponding path program 1 times [2022-07-13 18:25:21,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:21,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781104483] [2022-07-13 18:25:21,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:21,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:21,674 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:21,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:21,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781104483] [2022-07-13 18:25:21,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781104483] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:25:21,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642297262] [2022-07-13 18:25:21,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:21,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:25:21,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:25:21,677 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) [2022-07-13 18:25:21,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 18:25:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:21,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 18:25:21,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:25:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 18:25:22,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:25:22,156 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 18:25:22,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642297262] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:25:22,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:25:22,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2022-07-13 18:25:22,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017184784] [2022-07-13 18:25:22,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:25:22,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 18:25:22,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:22,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 18:25:22,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-07-13 18:25:22,158 INFO L87 Difference]: Start difference. First operand 3051 states and 4242 transitions. Second operand has 14 states, 14 states have (on average 16.214285714285715) internal successors, (227), 14 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:25,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:25,579 INFO L93 Difference]: Finished difference Result 32079 states and 44355 transitions. [2022-07-13 18:25:25,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-13 18:25:25,580 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 16.214285714285715) internal successors, (227), 14 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-07-13 18:25:25,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:25,622 INFO L225 Difference]: With dead ends: 32079 [2022-07-13 18:25:25,622 INFO L226 Difference]: Without dead ends: 29085 [2022-07-13 18:25:25,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=504, Invalid=1848, Unknown=0, NotChecked=0, Total=2352 [2022-07-13 18:25:25,635 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 1840 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1840 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:25,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1840 Valid, 851 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 18:25:25,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29085 states. [2022-07-13 18:25:27,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29085 to 21329. [2022-07-13 18:25:27,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21329 states, 21328 states have (on average 1.315078769692423) internal successors, (28048), 21328 states have internal predecessors, (28048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:27,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21329 states to 21329 states and 28048 transitions. [2022-07-13 18:25:27,188 INFO L78 Accepts]: Start accepts. Automaton has 21329 states and 28048 transitions. Word has length 81 [2022-07-13 18:25:27,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:27,188 INFO L495 AbstractCegarLoop]: Abstraction has 21329 states and 28048 transitions. [2022-07-13 18:25:27,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.214285714285715) internal successors, (227), 14 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:27,189 INFO L276 IsEmpty]: Start isEmpty. Operand 21329 states and 28048 transitions. [2022-07-13 18:25:27,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-13 18:25:27,190 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:27,190 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:27,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 18:25:27,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-13 18:25:27,404 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:27,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:27,404 INFO L85 PathProgramCache]: Analyzing trace with hash -326375627, now seen corresponding path program 1 times [2022-07-13 18:25:27,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:27,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132749220] [2022-07-13 18:25:27,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:27,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:27,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:27,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132749220] [2022-07-13 18:25:27,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132749220] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:25:27,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112159057] [2022-07-13 18:25:27,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:27,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:25:27,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:25:27,508 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) [2022-07-13 18:25:27,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 18:25:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:27,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 18:25:27,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:25:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:27,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:25:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:28,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112159057] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:25:28,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:25:28,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-07-13 18:25:28,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092881638] [2022-07-13 18:25:28,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:25:28,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 18:25:28,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:28,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 18:25:28,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-07-13 18:25:28,275 INFO L87 Difference]: Start difference. First operand 21329 states and 28048 transitions. Second operand has 23 states, 23 states have (on average 7.826086956521739) internal successors, (180), 22 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:36,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:36,517 INFO L93 Difference]: Finished difference Result 111689 states and 145951 transitions. [2022-07-13 18:25:36,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-13 18:25:36,518 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.826086956521739) internal successors, (180), 22 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-07-13 18:25:36,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:36,734 INFO L225 Difference]: With dead ends: 111689 [2022-07-13 18:25:36,734 INFO L226 Difference]: Without dead ends: 93075 [2022-07-13 18:25:36,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=490, Invalid=1402, Unknown=0, NotChecked=0, Total=1892 [2022-07-13 18:25:36,782 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 1876 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1876 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:36,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1876 Valid, 991 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 18:25:36,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93075 states. [2022-07-13 18:25:41,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93075 to 49443. [2022-07-13 18:25:41,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49443 states, 49442 states have (on average 1.3073298005744105) internal successors, (64637), 49442 states have internal predecessors, (64637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:41,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49443 states to 49443 states and 64637 transitions. [2022-07-13 18:25:41,706 INFO L78 Accepts]: Start accepts. Automaton has 49443 states and 64637 transitions. Word has length 82 [2022-07-13 18:25:41,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:41,706 INFO L495 AbstractCegarLoop]: Abstraction has 49443 states and 64637 transitions. [2022-07-13 18:25:41,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.826086956521739) internal successors, (180), 22 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:41,706 INFO L276 IsEmpty]: Start isEmpty. Operand 49443 states and 64637 transitions. [2022-07-13 18:25:41,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-13 18:25:41,708 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:41,708 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:41,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 18:25:41,919 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,SelfDestructingSolverStorable17 [2022-07-13 18:25:41,920 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:41,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:41,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1216708857, now seen corresponding path program 1 times [2022-07-13 18:25:41,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:41,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427196090] [2022-07-13 18:25:41,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:41,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:42,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:42,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427196090] [2022-07-13 18:25:42,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427196090] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:25:42,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995601335] [2022-07-13 18:25:42,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:42,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:25:42,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:25:42,023 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) [2022-07-13 18:25:42,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 18:25:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:42,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 18:25:42,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:25:42,561 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:42,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:25:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:43,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995601335] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:25:43,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:25:43,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2022-07-13 18:25:43,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285345936] [2022-07-13 18:25:43,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:25:43,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 18:25:43,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:43,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 18:25:43,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-07-13 18:25:43,005 INFO L87 Difference]: Start difference. First operand 49443 states and 64637 transitions. Second operand has 26 states, 26 states have (on average 8.923076923076923) internal successors, (232), 25 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)