./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.1.ufo.BOUNDED-8.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_floodmax.4.1.ufo.BOUNDED-8.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 d0919f37d9ec3b35ef959618459b2f9ff909696f753b572bc67b87ebda7b05b0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 18:21:56,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 18:21:56,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 18:21:56,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 18:21:56,420 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 18:21:56,421 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 18:21:56,423 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 18:21:56,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 18:21:56,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 18:21:56,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 18:21:56,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 18:21:56,433 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 18:21:56,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 18:21:56,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 18:21:56,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 18:21:56,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 18:21:56,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 18:21:56,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 18:21:56,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 18:21:56,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 18:21:56,449 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 18:21:56,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 18:21:56,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 18:21:56,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 18:21:56,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 18:21:56,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 18:21:56,460 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 18:21:56,460 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 18:21:56,461 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 18:21:56,462 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 18:21:56,463 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 18:21:56,463 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 18:21:56,464 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 18:21:56,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 18:21:56,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 18:21:56,466 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 18:21:56,467 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 18:21:56,467 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 18:21:56,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 18:21:56,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 18:21:56,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 18:21:56,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 18:21:56,472 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 18:21:56,498 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 18:21:56,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 18:21:56,499 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 18:21:56,499 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 18:21:56,500 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 18:21:56,500 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 18:21:56,501 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 18:21:56,501 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 18:21:56,501 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 18:21:56,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 18:21:56,502 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 18:21:56,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 18:21:56,503 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 18:21:56,503 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 18:21:56,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 18:21:56,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 18:21:56,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 18:21:56,504 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 18:21:56,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 18:21:56,505 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 18:21:56,505 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 18:21:56,505 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 18:21:56,505 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 18:21:56,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 18:21:56,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 18:21:56,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 18:21:56,506 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 18:21:56,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 18:21:56,507 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 18:21:56,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 18:21:56,507 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 18:21:56,508 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 18:21:56,508 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 18:21:56,508 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d0919f37d9ec3b35ef959618459b2f9ff909696f753b572bc67b87ebda7b05b0 [2022-07-13 18:21:56,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 18:21:56,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 18:21:56,753 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 18:21:56,754 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 18:21:56,754 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 18:21:56,755 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c [2022-07-13 18:21:56,824 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61695de74/69e28ce1118f482a996d99c667b07f26/FLAG002bb4d1f [2022-07-13 18:21:57,249 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 18:21:57,250 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c [2022-07-13 18:21:57,268 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61695de74/69e28ce1118f482a996d99c667b07f26/FLAG002bb4d1f [2022-07-13 18:21:57,286 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61695de74/69e28ce1118f482a996d99c667b07f26 [2022-07-13 18:21:57,288 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 18:21:57,289 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 18:21:57,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 18:21:57,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 18:21:57,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 18:21:57,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:21:57" (1/1) ... [2022-07-13 18:21:57,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b1e0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:57, skipping insertion in model container [2022-07-13 18:21:57,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:21:57" (1/1) ... [2022-07-13 18:21:57,304 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 18:21:57,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 18:21:57,620 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_floodmax.4.1.ufo.BOUNDED-8.pals.c[24198,24211] [2022-07-13 18:21:57,623 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 18:21:57,630 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 18:21:57,697 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_floodmax.4.1.ufo.BOUNDED-8.pals.c[24198,24211] [2022-07-13 18:21:57,698 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 18:21:57,722 INFO L208 MainTranslator]: Completed translation [2022-07-13 18:21:57,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:57 WrapperNode [2022-07-13 18:21:57,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 18:21:57,724 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 18:21:57,724 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 18:21:57,724 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 18:21:57,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:57" (1/1) ... [2022-07-13 18:21:57,741 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:57" (1/1) ... [2022-07-13 18:21:57,792 INFO L137 Inliner]: procedures = 23, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 927 [2022-07-13 18:21:57,792 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 18:21:57,793 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 18:21:57,793 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 18:21:57,793 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 18:21:57,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:57" (1/1) ... [2022-07-13 18:21:57,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:57" (1/1) ... [2022-07-13 18:21:57,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:57" (1/1) ... [2022-07-13 18:21:57,805 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:57" (1/1) ... [2022-07-13 18:21:57,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:57" (1/1) ... [2022-07-13 18:21:57,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:57" (1/1) ... [2022-07-13 18:21:57,844 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:57" (1/1) ... [2022-07-13 18:21:57,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 18:21:57,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 18:21:57,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 18:21:57,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 18:21:57,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:57" (1/1) ... [2022-07-13 18:21:57,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 18:21:57,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:21:57,896 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 18:21:57,908 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 18:21:57,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 18:21:57,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 18:21:57,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 18:21:57,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 18:21:58,111 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 18:21:58,112 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 18:21:58,891 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 18:21:58,920 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 18:21:58,921 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 18:21:58,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:21:58 BoogieIcfgContainer [2022-07-13 18:21:58,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 18:21:58,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 18:21:58,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 18:21:58,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 18:21:58,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 06:21:57" (1/3) ... [2022-07-13 18:21:58,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d4e0466 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:21:58, skipping insertion in model container [2022-07-13 18:21:58,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:21:57" (2/3) ... [2022-07-13 18:21:58,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d4e0466 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:21:58, skipping insertion in model container [2022-07-13 18:21:58,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:21:58" (3/3) ... [2022-07-13 18:21:58,930 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.1.ufo.BOUNDED-8.pals.c [2022-07-13 18:21:58,940 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 18:21:58,940 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 18:21:58,986 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 18:21:58,992 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@3ae8ade, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7cb0fbce [2022-07-13 18:21:58,992 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 18:21:59,004 INFO L276 IsEmpty]: Start isEmpty. Operand has 292 states, 290 states have (on average 1.8) internal successors, (522), 291 states have internal predecessors, (522), 0 states have call successors, (0), 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 18:21:59,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-13 18:21:59,017 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:21:59,018 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, 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 18:21:59,018 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:21:59,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:21:59,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1078131632, now seen corresponding path program 1 times [2022-07-13 18:21:59,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:21:59,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84522210] [2022-07-13 18:21:59,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:21:59,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:21:59,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:21:59,338 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 18:21:59,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:21:59,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84522210] [2022-07-13 18:21:59,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84522210] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:21:59,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:21:59,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 18:21:59,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059154839] [2022-07-13 18:21:59,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:21:59,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 18:21:59,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:21:59,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 18:21:59,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 18:21:59,372 INFO L87 Difference]: Start difference. First operand has 292 states, 290 states have (on average 1.8) internal successors, (522), 291 states have internal predecessors, (522), 0 states have call successors, (0), 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 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:21:59,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:21:59,421 INFO L93 Difference]: Finished difference Result 405 states and 714 transitions. [2022-07-13 18:21:59,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 18:21:59,423 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-07-13 18:21:59,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:21:59,432 INFO L225 Difference]: With dead ends: 405 [2022-07-13 18:21:59,432 INFO L226 Difference]: Without dead ends: 288 [2022-07-13 18:21:59,436 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 18:21:59,438 INFO L413 NwaCegarLoop]: 519 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, 519 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 18:21:59,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:21:59,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-07-13 18:21:59,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2022-07-13 18:21:59,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.7944250871080138) internal successors, (515), 287 states have internal predecessors, (515), 0 states have call successors, (0), 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 18:21:59,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 515 transitions. [2022-07-13 18:21:59,481 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 515 transitions. Word has length 77 [2022-07-13 18:21:59,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:21:59,481 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 515 transitions. [2022-07-13 18:21:59,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:21:59,482 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 515 transitions. [2022-07-13 18:21:59,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-13 18:21:59,485 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:21:59,485 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, 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 18:21:59,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 18:21:59,486 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:21:59,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:21:59,487 INFO L85 PathProgramCache]: Analyzing trace with hash 944118126, now seen corresponding path program 1 times [2022-07-13 18:21:59,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:21:59,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024694083] [2022-07-13 18:21:59,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:21:59,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:21:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:21:59,596 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 18:21:59,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:21:59,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024694083] [2022-07-13 18:21:59,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024694083] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:21:59,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:21:59,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 18:21:59,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382346445] [2022-07-13 18:21:59,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:21:59,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:21:59,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:21:59,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:21:59,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:21:59,600 INFO L87 Difference]: Start difference. First operand 288 states and 515 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:21:59,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:21:59,675 INFO L93 Difference]: Finished difference Result 400 states and 704 transitions. [2022-07-13 18:21:59,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 18:21:59,676 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-07-13 18:21:59,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:21:59,678 INFO L225 Difference]: With dead ends: 400 [2022-07-13 18:21:59,678 INFO L226 Difference]: Without dead ends: 288 [2022-07-13 18:21:59,679 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 18:21:59,680 INFO L413 NwaCegarLoop]: 513 mSDtfsCounter, 3 mSDsluCounter, 1506 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2019 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:21:59,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 2019 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:21:59,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-07-13 18:21:59,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2022-07-13 18:21:59,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.6898954703832754) internal successors, (485), 287 states have internal predecessors, (485), 0 states have call successors, (0), 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 18:21:59,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 485 transitions. [2022-07-13 18:21:59,706 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 485 transitions. Word has length 77 [2022-07-13 18:21:59,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:21:59,708 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 485 transitions. [2022-07-13 18:21:59,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:21:59,709 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 485 transitions. [2022-07-13 18:21:59,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-13 18:21:59,717 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:21:59,717 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:21:59,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 18:21:59,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:21:59,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:21:59,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1676331028, now seen corresponding path program 1 times [2022-07-13 18:21:59,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:21:59,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280250248] [2022-07-13 18:21:59,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:21:59,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:21:59,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:21:59,880 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 18:21:59,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:21:59,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280250248] [2022-07-13 18:21:59,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280250248] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:21:59,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:21:59,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:21:59,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032593221] [2022-07-13 18:21:59,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:21:59,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:21:59,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:21:59,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:21:59,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:21:59,884 INFO L87 Difference]: Start difference. First operand 288 states and 485 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 18:21:59,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:21:59,925 INFO L93 Difference]: Finished difference Result 493 states and 834 transitions. [2022-07-13 18:21:59,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:21:59,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2022-07-13 18:21:59,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:21:59,929 INFO L225 Difference]: With dead ends: 493 [2022-07-13 18:21:59,929 INFO L226 Difference]: Without dead ends: 385 [2022-07-13 18:21:59,930 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 18:21:59,931 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 156 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:21:59,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 1064 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:21:59,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-07-13 18:21:59,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 383. [2022-07-13 18:21:59,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 1.6832460732984293) internal successors, (643), 382 states have internal predecessors, (643), 0 states have call successors, (0), 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 18:21:59,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 643 transitions. [2022-07-13 18:21:59,947 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 643 transitions. Word has length 106 [2022-07-13 18:21:59,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:21:59,947 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 643 transitions. [2022-07-13 18:21:59,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 18:21:59,948 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 643 transitions. [2022-07-13 18:21:59,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-13 18:21:59,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:21:59,951 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:21:59,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 18:21:59,952 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:21:59,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:21:59,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1628186862, now seen corresponding path program 1 times [2022-07-13 18:21:59,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:21:59,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978633442] [2022-07-13 18:21:59,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:21:59,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:21:59,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:22:00,025 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 18:22:00,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:22:00,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978633442] [2022-07-13 18:22:00,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978633442] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:22:00,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:22:00,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:22:00,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080949573] [2022-07-13 18:22:00,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:22:00,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:22:00,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:22:00,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:22:00,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:22:00,028 INFO L87 Difference]: Start difference. First operand 383 states and 643 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 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 18:22:00,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:22:00,059 INFO L93 Difference]: Finished difference Result 581 states and 981 transitions. [2022-07-13 18:22:00,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:22:00,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 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 109 [2022-07-13 18:22:00,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:22:00,064 INFO L225 Difference]: With dead ends: 581 [2022-07-13 18:22:00,065 INFO L226 Difference]: Without dead ends: 473 [2022-07-13 18:22:00,066 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 18:22:00,069 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 165 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1077 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 18:22:00,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1077 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:22:00,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-07-13 18:22:00,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 471. [2022-07-13 18:22:00,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.6872340425531915) internal successors, (793), 470 states have internal predecessors, (793), 0 states have call successors, (0), 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 18:22:00,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 793 transitions. [2022-07-13 18:22:00,090 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 793 transitions. Word has length 109 [2022-07-13 18:22:00,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:22:00,091 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 793 transitions. [2022-07-13 18:22:00,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 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 18:22:00,091 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 793 transitions. [2022-07-13 18:22:00,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-13 18:22:00,092 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:22:00,093 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:00,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 18:22:00,093 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:22:00,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:22:00,094 INFO L85 PathProgramCache]: Analyzing trace with hash 366340874, now seen corresponding path program 1 times [2022-07-13 18:22:00,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:22:00,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903142350] [2022-07-13 18:22:00,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:22:00,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:22:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:22:00,204 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 18:22:00,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:22:00,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903142350] [2022-07-13 18:22:00,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903142350] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:22:00,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:22:00,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:22:00,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862942092] [2022-07-13 18:22:00,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:22:00,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:22:00,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:22:00,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:22:00,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:22:00,210 INFO L87 Difference]: Start difference. First operand 471 states and 793 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 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 18:22:00,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:22:00,245 INFO L93 Difference]: Finished difference Result 1022 states and 1724 transitions. [2022-07-13 18:22:00,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:22:00,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 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 109 [2022-07-13 18:22:00,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:22:00,249 INFO L225 Difference]: With dead ends: 1022 [2022-07-13 18:22:00,249 INFO L226 Difference]: Without dead ends: 733 [2022-07-13 18:22:00,251 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 18:22:00,255 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 157 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:22:00,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 1066 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:22:00,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-07-13 18:22:00,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 731. [2022-07-13 18:22:00,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 1.6835616438356165) internal successors, (1229), 730 states have internal predecessors, (1229), 0 states have call successors, (0), 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 18:22:00,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1229 transitions. [2022-07-13 18:22:00,286 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1229 transitions. Word has length 109 [2022-07-13 18:22:00,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:22:00,287 INFO L495 AbstractCegarLoop]: Abstraction has 731 states and 1229 transitions. [2022-07-13 18:22:00,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 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 18:22:00,290 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1229 transitions. [2022-07-13 18:22:00,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-13 18:22:00,293 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:22:00,294 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:00,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 18:22:00,294 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:22:00,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:22:00,295 INFO L85 PathProgramCache]: Analyzing trace with hash 774604903, now seen corresponding path program 1 times [2022-07-13 18:22:00,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:22:00,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247562059] [2022-07-13 18:22:00,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:22:00,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:22:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:22:00,376 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 18:22:00,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:22:00,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247562059] [2022-07-13 18:22:00,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247562059] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:22:00,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:22:00,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:22:00,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452349662] [2022-07-13 18:22:00,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:22:00,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:22:00,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:22:00,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:22:00,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:22:00,379 INFO L87 Difference]: Start difference. First operand 731 states and 1229 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 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 18:22:00,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:22:00,413 INFO L93 Difference]: Finished difference Result 1262 states and 2126 transitions. [2022-07-13 18:22:00,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:22:00,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 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 112 [2022-07-13 18:22:00,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:22:00,419 INFO L225 Difference]: With dead ends: 1262 [2022-07-13 18:22:00,419 INFO L226 Difference]: Without dead ends: 973 [2022-07-13 18:22:00,420 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 18:22:00,425 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 158 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 1058 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 18:22:00,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 1058 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:22:00,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-07-13 18:22:00,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 971. [2022-07-13 18:22:00,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.6804123711340206) internal successors, (1630), 970 states have internal predecessors, (1630), 0 states have call successors, (0), 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 18:22:00,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1630 transitions. [2022-07-13 18:22:00,449 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1630 transitions. Word has length 112 [2022-07-13 18:22:00,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:22:00,450 INFO L495 AbstractCegarLoop]: Abstraction has 971 states and 1630 transitions. [2022-07-13 18:22:00,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 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 18:22:00,451 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1630 transitions. [2022-07-13 18:22:00,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-13 18:22:00,452 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:22:00,452 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:00,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 18:22:00,453 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:22:00,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:22:00,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1082308739, now seen corresponding path program 1 times [2022-07-13 18:22:00,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:22:00,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6533615] [2022-07-13 18:22:00,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:22:00,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:22:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:22:00,515 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 18:22:00,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:22:00,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6533615] [2022-07-13 18:22:00,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6533615] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:22:00,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:22:00,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:22:00,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623916658] [2022-07-13 18:22:00,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:22:00,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:22:00,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:22:00,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:22:00,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:22:00,518 INFO L87 Difference]: Start difference. First operand 971 states and 1630 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 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 18:22:00,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:22:00,554 INFO L93 Difference]: Finished difference Result 2442 states and 4095 transitions. [2022-07-13 18:22:00,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:22:00,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 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 112 [2022-07-13 18:22:00,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:22:00,561 INFO L225 Difference]: With dead ends: 2442 [2022-07-13 18:22:00,562 INFO L226 Difference]: Without dead ends: 1666 [2022-07-13 18:22:00,563 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 18:22:00,563 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 150 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:22:00,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 1048 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:22:00,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1666 states. [2022-07-13 18:22:00,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1666 to 1664. [2022-07-13 18:22:00,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1663 states have (on average 1.6692723992784124) internal successors, (2776), 1663 states have internal predecessors, (2776), 0 states have call successors, (0), 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 18:22:00,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 2776 transitions. [2022-07-13 18:22:00,606 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 2776 transitions. Word has length 112 [2022-07-13 18:22:00,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:22:00,606 INFO L495 AbstractCegarLoop]: Abstraction has 1664 states and 2776 transitions. [2022-07-13 18:22:00,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 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 18:22:00,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 2776 transitions. [2022-07-13 18:22:00,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-13 18:22:00,608 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:22:00,608 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:00,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 18:22:00,609 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:22:00,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:22:00,610 INFO L85 PathProgramCache]: Analyzing trace with hash 345845541, now seen corresponding path program 1 times [2022-07-13 18:22:00,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:22:00,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146783052] [2022-07-13 18:22:00,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:22:00,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:22:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:22:00,664 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 18:22:00,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:22:00,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146783052] [2022-07-13 18:22:00,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146783052] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:22:00,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:22:00,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:22:00,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088618869] [2022-07-13 18:22:00,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:22:00,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:22:00,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:22:00,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:22:00,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:22:00,667 INFO L87 Difference]: Start difference. First operand 1664 states and 2776 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 18:22:00,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:22:00,711 INFO L93 Difference]: Finished difference Result 3049 states and 5099 transitions. [2022-07-13 18:22:00,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:22:00,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 115 [2022-07-13 18:22:00,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:22:00,720 INFO L225 Difference]: With dead ends: 3049 [2022-07-13 18:22:00,720 INFO L226 Difference]: Without dead ends: 2273 [2022-07-13 18:22:00,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:22:00,724 INFO L413 NwaCegarLoop]: 583 mSDtfsCounter, 151 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1039 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 18:22:00,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 1039 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:22:00,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2022-07-13 18:22:00,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 2271. [2022-07-13 18:22:00,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2271 states, 2270 states have (on average 1.6647577092511012) internal successors, (3779), 2270 states have internal predecessors, (3779), 0 states have call successors, (0), 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 18:22:00,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2271 states to 2271 states and 3779 transitions. [2022-07-13 18:22:00,817 INFO L78 Accepts]: Start accepts. Automaton has 2271 states and 3779 transitions. Word has length 115 [2022-07-13 18:22:00,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:22:00,818 INFO L495 AbstractCegarLoop]: Abstraction has 2271 states and 3779 transitions. [2022-07-13 18:22:00,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 18:22:00,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2271 states and 3779 transitions. [2022-07-13 18:22:00,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-13 18:22:00,819 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:22:00,820 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:00,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 18:22:00,820 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:22:00,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:22:00,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1349045569, now seen corresponding path program 1 times [2022-07-13 18:22:00,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:22:00,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181909344] [2022-07-13 18:22:00,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:22:00,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:22:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:22:00,889 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 18:22:00,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:22:00,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181909344] [2022-07-13 18:22:00,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181909344] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:22:00,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:22:00,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:22:00,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482369333] [2022-07-13 18:22:00,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:22:00,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:22:00,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:22:00,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:22:00,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:22:00,893 INFO L87 Difference]: Start difference. First operand 2271 states and 3779 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 18:22:00,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:22:00,972 INFO L93 Difference]: Finished difference Result 6154 states and 10198 transitions. [2022-07-13 18:22:00,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:22:00,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 115 [2022-07-13 18:22:00,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:22:00,987 INFO L225 Difference]: With dead ends: 6154 [2022-07-13 18:22:00,987 INFO L226 Difference]: Without dead ends: 4091 [2022-07-13 18:22:00,993 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 18:22:00,995 INFO L413 NwaCegarLoop]: 573 mSDtfsCounter, 143 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:22:00,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 1030 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:22:01,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4091 states. [2022-07-13 18:22:01,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4091 to 4089. [2022-07-13 18:22:01,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4089 states, 4088 states have (on average 1.6465264187866928) internal successors, (6731), 4088 states have internal predecessors, (6731), 0 states have call successors, (0), 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 18:22:01,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4089 states to 4089 states and 6731 transitions. [2022-07-13 18:22:01,149 INFO L78 Accepts]: Start accepts. Automaton has 4089 states and 6731 transitions. Word has length 115 [2022-07-13 18:22:01,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:22:01,150 INFO L495 AbstractCegarLoop]: Abstraction has 4089 states and 6731 transitions. [2022-07-13 18:22:01,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 18:22:01,150 INFO L276 IsEmpty]: Start isEmpty. Operand 4089 states and 6731 transitions. [2022-07-13 18:22:01,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-13 18:22:01,151 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:22:01,152 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:01,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 18:22:01,152 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:22:01,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:22:01,153 INFO L85 PathProgramCache]: Analyzing trace with hash 613191678, now seen corresponding path program 1 times [2022-07-13 18:22:01,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:22:01,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372858491] [2022-07-13 18:22:01,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:22:01,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:22:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:22:01,206 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 18:22:01,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:22:01,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372858491] [2022-07-13 18:22:01,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372858491] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:22:01,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:22:01,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:22:01,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284259164] [2022-07-13 18:22:01,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:22:01,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:22:01,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:22:01,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:22:01,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:22:01,209 INFO L87 Difference]: Start difference. First operand 4089 states and 6731 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 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 18:22:01,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:22:01,369 INFO L93 Difference]: Finished difference Result 7688 states and 12684 transitions. [2022-07-13 18:22:01,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:22:01,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 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 118 [2022-07-13 18:22:01,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:22:01,391 INFO L225 Difference]: With dead ends: 7688 [2022-07-13 18:22:01,391 INFO L226 Difference]: Without dead ends: 5625 [2022-07-13 18:22:01,395 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 18:22:01,395 INFO L413 NwaCegarLoop]: 563 mSDtfsCounter, 144 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1020 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 18:22:01,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 1020 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:22:01,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5625 states. [2022-07-13 18:22:01,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5625 to 5623. [2022-07-13 18:22:01,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5623 states, 5622 states have (on average 1.639274279615795) internal successors, (9216), 5622 states have internal predecessors, (9216), 0 states have call successors, (0), 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 18:22:01,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5623 states to 5623 states and 9216 transitions. [2022-07-13 18:22:01,595 INFO L78 Accepts]: Start accepts. Automaton has 5623 states and 9216 transitions. Word has length 118 [2022-07-13 18:22:01,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:22:01,596 INFO L495 AbstractCegarLoop]: Abstraction has 5623 states and 9216 transitions. [2022-07-13 18:22:01,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 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 18:22:01,596 INFO L276 IsEmpty]: Start isEmpty. Operand 5623 states and 9216 transitions. [2022-07-13 18:22:01,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-13 18:22:01,597 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:22:01,597 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:01,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 18:22:01,598 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:22:01,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:22:01,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1630772250, now seen corresponding path program 1 times [2022-07-13 18:22:01,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:22:01,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383670080] [2022-07-13 18:22:01,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:22:01,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:22:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:22:01,694 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 18:22:01,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:22:01,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383670080] [2022-07-13 18:22:01,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383670080] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:22:01,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:22:01,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 18:22:01,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077117590] [2022-07-13 18:22:01,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:22:01,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 18:22:01,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:22:01,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 18:22:01,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:22:01,698 INFO L87 Difference]: Start difference. First operand 5623 states and 9216 transitions. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 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 18:22:02,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:22:02,645 INFO L93 Difference]: Finished difference Result 35969 states and 59426 transitions. [2022-07-13 18:22:02,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 18:22:02,646 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 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 118 [2022-07-13 18:22:02,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:22:02,745 INFO L225 Difference]: With dead ends: 35969 [2022-07-13 18:22:02,746 INFO L226 Difference]: Without dead ends: 30567 [2022-07-13 18:22:02,760 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 18:22:02,761 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 1623 mSDsluCounter, 3326 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1623 SdHoareTripleChecker+Valid, 3807 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:22:02,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1623 Valid, 3807 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:22:02,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30567 states. [2022-07-13 18:22:03,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30567 to 10851. [2022-07-13 18:22:03,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10851 states, 10850 states have (on average 1.6316129032258064) internal successors, (17703), 10850 states have internal predecessors, (17703), 0 states have call successors, (0), 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 18:22:03,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10851 states to 10851 states and 17703 transitions. [2022-07-13 18:22:03,413 INFO L78 Accepts]: Start accepts. Automaton has 10851 states and 17703 transitions. Word has length 118 [2022-07-13 18:22:03,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:22:03,414 INFO L495 AbstractCegarLoop]: Abstraction has 10851 states and 17703 transitions. [2022-07-13 18:22:03,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 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 18:22:03,415 INFO L276 IsEmpty]: Start isEmpty. Operand 10851 states and 17703 transitions. [2022-07-13 18:22:03,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-13 18:22:03,416 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:22:03,416 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:03,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 18:22:03,417 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:22:03,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:22:03,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1214692757, now seen corresponding path program 1 times [2022-07-13 18:22:03,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:22:03,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770888303] [2022-07-13 18:22:03,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:22:03,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:22:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:22:03,534 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 18:22:03,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:22:03,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770888303] [2022-07-13 18:22:03,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770888303] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:22:03,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:22:03,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 18:22:03,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160615657] [2022-07-13 18:22:03,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:22:03,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 18:22:03,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:22:03,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 18:22:03,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 18:22:03,536 INFO L87 Difference]: Start difference. First operand 10851 states and 17703 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 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 18:22:04,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:22:04,383 INFO L93 Difference]: Finished difference Result 35681 states and 58577 transitions. [2022-07-13 18:22:04,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 18:22:04,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2022-07-13 18:22:04,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:22:04,446 INFO L225 Difference]: With dead ends: 35681 [2022-07-13 18:22:04,446 INFO L226 Difference]: Without dead ends: 25051 [2022-07-13 18:22:04,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:22:04,467 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 531 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:22:04,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 1565 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:22:04,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25051 states. [2022-07-13 18:22:05,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25051 to 17896. [2022-07-13 18:22:05,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17896 states, 17895 states have (on average 1.6318524727577535) internal successors, (29202), 17895 states have internal predecessors, (29202), 0 states have call successors, (0), 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 18:22:05,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17896 states to 17896 states and 29202 transitions. [2022-07-13 18:22:05,280 INFO L78 Accepts]: Start accepts. Automaton has 17896 states and 29202 transitions. Word has length 119 [2022-07-13 18:22:05,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:22:05,281 INFO L495 AbstractCegarLoop]: Abstraction has 17896 states and 29202 transitions. [2022-07-13 18:22:05,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 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 18:22:05,281 INFO L276 IsEmpty]: Start isEmpty. Operand 17896 states and 29202 transitions. [2022-07-13 18:22:05,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-13 18:22:05,282 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:22:05,282 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:05,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 18:22:05,283 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:22:05,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:22:05,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1370134705, now seen corresponding path program 1 times [2022-07-13 18:22:05,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:22:05,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964226949] [2022-07-13 18:22:05,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:22:05,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:22:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:22:05,346 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 18:22:05,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:22:05,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964226949] [2022-07-13 18:22:05,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964226949] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:22:05,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:22:05,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 18:22:05,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053124034] [2022-07-13 18:22:05,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:22:05,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 18:22:05,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:22:05,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 18:22:05,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 18:22:05,349 INFO L87 Difference]: Start difference. First operand 17896 states and 29202 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 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 18:22:06,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:22:06,593 INFO L93 Difference]: Finished difference Result 58495 states and 95655 transitions. [2022-07-13 18:22:06,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 18:22:06,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2022-07-13 18:22:06,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:22:06,734 INFO L225 Difference]: With dead ends: 58495 [2022-07-13 18:22:06,734 INFO L226 Difference]: Without dead ends: 40820 [2022-07-13 18:22:06,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:22:06,760 INFO L413 NwaCegarLoop]: 474 mSDtfsCounter, 529 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 1561 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:22:06,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 1561 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:22:06,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40820 states. [2022-07-13 18:22:07,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40820 to 29269. [2022-07-13 18:22:08,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29269 states, 29268 states have (on average 1.6253587535875358) internal successors, (47571), 29268 states have internal predecessors, (47571), 0 states have call successors, (0), 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 18:22:08,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29269 states to 29269 states and 47571 transitions. [2022-07-13 18:22:08,088 INFO L78 Accepts]: Start accepts. Automaton has 29269 states and 47571 transitions. Word has length 120 [2022-07-13 18:22:08,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:22:08,089 INFO L495 AbstractCegarLoop]: Abstraction has 29269 states and 47571 transitions. [2022-07-13 18:22:08,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 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 18:22:08,089 INFO L276 IsEmpty]: Start isEmpty. Operand 29269 states and 47571 transitions. [2022-07-13 18:22:08,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-07-13 18:22:08,091 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:22:08,091 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:08,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 18:22:08,091 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:22:08,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:22:08,093 INFO L85 PathProgramCache]: Analyzing trace with hash 2062872140, now seen corresponding path program 1 times [2022-07-13 18:22:08,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:22:08,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693187977] [2022-07-13 18:22:08,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:22:08,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:22:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:22:08,154 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 18:22:08,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:22:08,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693187977] [2022-07-13 18:22:08,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693187977] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:22:08,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:22:08,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 18:22:08,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391159914] [2022-07-13 18:22:08,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:22:08,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 18:22:08,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:22:08,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 18:22:08,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 18:22:08,158 INFO L87 Difference]: Start difference. First operand 29269 states and 47571 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 18:22:09,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:22:09,891 INFO L93 Difference]: Finished difference Result 95301 states and 155229 transitions. [2022-07-13 18:22:09,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 18:22:09,892 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2022-07-13 18:22:09,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:22:10,054 INFO L225 Difference]: With dead ends: 95301 [2022-07-13 18:22:10,054 INFO L226 Difference]: Without dead ends: 66253 [2022-07-13 18:22:10,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:22:10,101 INFO L413 NwaCegarLoop]: 474 mSDtfsCounter, 527 mSDsluCounter, 1089 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 1563 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:22:10,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 1563 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:22:10,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66253 states. [2022-07-13 18:22:11,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66253 to 47618. [2022-07-13 18:22:11,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47618 states, 47617 states have (on average 1.6189176134573786) internal successors, (77088), 47617 states have internal predecessors, (77088), 0 states have call successors, (0), 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 18:22:11,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47618 states to 47618 states and 77088 transitions. [2022-07-13 18:22:11,921 INFO L78 Accepts]: Start accepts. Automaton has 47618 states and 77088 transitions. Word has length 121 [2022-07-13 18:22:11,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:22:11,921 INFO L495 AbstractCegarLoop]: Abstraction has 47618 states and 77088 transitions. [2022-07-13 18:22:11,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 18:22:11,922 INFO L276 IsEmpty]: Start isEmpty. Operand 47618 states and 77088 transitions. [2022-07-13 18:22:11,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-13 18:22:11,923 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:22:11,923 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:11,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 18:22:11,924 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:22:11,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:22:11,924 INFO L85 PathProgramCache]: Analyzing trace with hash -2063066808, now seen corresponding path program 1 times [2022-07-13 18:22:11,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:22:11,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471018065] [2022-07-13 18:22:11,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:22:11,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:22:11,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:22:11,994 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 18:22:11,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:22:11,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471018065] [2022-07-13 18:22:11,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471018065] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:22:11,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:22:11,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 18:22:11,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913067776] [2022-07-13 18:22:11,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:22:11,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 18:22:11,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:22:11,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 18:22:11,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 18:22:11,996 INFO L87 Difference]: Start difference. First operand 47618 states and 77088 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 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 18:22:14,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:22:14,890 INFO L93 Difference]: Finished difference Result 153307 states and 248731 transitions. [2022-07-13 18:22:14,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 18:22:14,890 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2022-07-13 18:22:14,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:22:15,121 INFO L225 Difference]: With dead ends: 153307 [2022-07-13 18:22:15,122 INFO L226 Difference]: Without dead ends: 105910 [2022-07-13 18:22:15,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:22:15,187 INFO L413 NwaCegarLoop]: 474 mSDtfsCounter, 525 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:22:15,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 1565 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:22:15,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105910 states. [2022-07-13 18:22:17,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105910 to 76539. [2022-07-13 18:22:17,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76539 states, 76538 states have (on average 1.612649925527189) internal successors, (123429), 76538 states have internal predecessors, (123429), 0 states have call successors, (0), 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 18:22:17,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76539 states to 76539 states and 123429 transitions. [2022-07-13 18:22:17,858 INFO L78 Accepts]: Start accepts. Automaton has 76539 states and 123429 transitions. Word has length 122 [2022-07-13 18:22:17,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:22:17,859 INFO L495 AbstractCegarLoop]: Abstraction has 76539 states and 123429 transitions. [2022-07-13 18:22:17,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 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 18:22:17,859 INFO L276 IsEmpty]: Start isEmpty. Operand 76539 states and 123429 transitions. [2022-07-13 18:22:17,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-13 18:22:17,860 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:22:17,860 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:17,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 18:22:17,861 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:22:17,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:22:17,861 INFO L85 PathProgramCache]: Analyzing trace with hash -548465248, now seen corresponding path program 1 times [2022-07-13 18:22:17,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:22:17,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710823691] [2022-07-13 18:22:17,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:22:17,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:22:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:22:17,998 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 18:22:17,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:22:17,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710823691] [2022-07-13 18:22:18,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710823691] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:22:18,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:22:18,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 18:22:18,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665007056] [2022-07-13 18:22:18,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:22:18,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 18:22:18,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:22:18,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 18:22:18,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:22:18,002 INFO L87 Difference]: Start difference. First operand 76539 states and 123429 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 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 18:22:20,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:22:20,486 INFO L93 Difference]: Finished difference Result 152859 states and 246500 transitions. [2022-07-13 18:22:20,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 18:22:20,486 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 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) Word has length 124 [2022-07-13 18:22:20,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:22:20,611 INFO L225 Difference]: With dead ends: 152859 [2022-07-13 18:22:20,611 INFO L226 Difference]: Without dead ends: 76541 [2022-07-13 18:22:20,683 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 18:22:20,684 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 433 mSDsluCounter, 1347 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1826 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:22:20,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 1826 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:22:20,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76541 states. [2022-07-13 18:22:23,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76541 to 76539. [2022-07-13 18:22:23,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76539 states, 76538 states have (on average 1.6044840471399828) internal successors, (122804), 76538 states have internal predecessors, (122804), 0 states have call successors, (0), 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 18:22:23,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76539 states to 76539 states and 122804 transitions. [2022-07-13 18:22:23,890 INFO L78 Accepts]: Start accepts. Automaton has 76539 states and 122804 transitions. Word has length 124 [2022-07-13 18:22:23,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:22:23,890 INFO L495 AbstractCegarLoop]: Abstraction has 76539 states and 122804 transitions. [2022-07-13 18:22:23,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 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 18:22:23,891 INFO L276 IsEmpty]: Start isEmpty. Operand 76539 states and 122804 transitions. [2022-07-13 18:22:23,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-13 18:22:23,892 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:22:23,892 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:23,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 18:22:23,892 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:22:23,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:22:23,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1974939087, now seen corresponding path program 1 times [2022-07-13 18:22:23,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:22:23,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355092350] [2022-07-13 18:22:23,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:22:23,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:22:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:22:24,019 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 18:22:24,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:22:24,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355092350] [2022-07-13 18:22:24,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355092350] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:22:24,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:22:24,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 18:22:24,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373058189] [2022-07-13 18:22:24,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:22:24,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 18:22:24,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:22:24,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 18:22:24,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:22:24,022 INFO L87 Difference]: Start difference. First operand 76539 states and 122804 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 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 18:22:28,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:22:28,529 INFO L93 Difference]: Finished difference Result 223785 states and 359496 transitions. [2022-07-13 18:22:28,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 18:22:28,530 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 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 127 [2022-07-13 18:22:28,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:22:28,741 INFO L225 Difference]: With dead ends: 223785 [2022-07-13 18:22:28,742 INFO L226 Difference]: Without dead ends: 147467 [2022-07-13 18:22:28,796 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 18:22:28,802 INFO L413 NwaCegarLoop]: 472 mSDtfsCounter, 708 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 1837 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:22:28,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [708 Valid, 1837 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:22:28,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147467 states. [2022-07-13 18:22:33,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147467 to 147465. [2022-07-13 18:22:33,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147465 states, 147464 states have (on average 1.5938330711224435) internal successors, (235033), 147464 states have internal predecessors, (235033), 0 states have call successors, (0), 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 18:22:34,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147465 states to 147465 states and 235033 transitions. [2022-07-13 18:22:34,267 INFO L78 Accepts]: Start accepts. Automaton has 147465 states and 235033 transitions. Word has length 127 [2022-07-13 18:22:34,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:22:34,267 INFO L495 AbstractCegarLoop]: Abstraction has 147465 states and 235033 transitions. [2022-07-13 18:22:34,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 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 18:22:34,267 INFO L276 IsEmpty]: Start isEmpty. Operand 147465 states and 235033 transitions. [2022-07-13 18:22:34,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-13 18:22:34,268 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:22:34,268 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:22:34,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 18:22:34,269 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:22:34,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:22:34,269 INFO L85 PathProgramCache]: Analyzing trace with hash 662224137, now seen corresponding path program 1 times [2022-07-13 18:22:34,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:22:34,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146389530] [2022-07-13 18:22:34,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:22:34,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:22:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:22:34,380 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 18:22:34,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:22:34,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146389530] [2022-07-13 18:22:34,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146389530] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:22:34,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:22:34,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 18:22:34,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189031805] [2022-07-13 18:22:34,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:22:34,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:22:34,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:22:34,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:22:34,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:22:34,383 INFO L87 Difference]: Start difference. First operand 147465 states and 235033 transitions. Second operand has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)