./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label13.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/eca-rers2012/Problem13_label13.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 b7385fd88a67a4d51b868c33a4a2a17411348aca1f3bf817148857f9693eef2c --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 12:17:53,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 12:17:53,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 12:17:53,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 12:17:53,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 12:17:53,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 12:17:53,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 12:17:53,085 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 12:17:53,086 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 12:17:53,091 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 12:17:53,091 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 12:17:53,093 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 12:17:53,093 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 12:17:53,095 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 12:17:53,096 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 12:17:53,098 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 12:17:53,098 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 12:17:53,100 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 12:17:53,103 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 12:17:53,104 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 12:17:53,107 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 12:17:53,108 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 12:17:53,108 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 12:17:53,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 12:17:53,110 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 12:17:53,112 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 12:17:53,113 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 12:17:53,113 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 12:17:53,114 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 12:17:53,114 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 12:17:53,115 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 12:17:53,115 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 12:17:53,116 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 12:17:53,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 12:17:53,117 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 12:17:53,118 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 12:17:53,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 12:17:53,118 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 12:17:53,118 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 12:17:53,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 12:17:53,119 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 12:17:53,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 12:17:53,120 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 12:17:53,144 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 12:17:53,145 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 12:17:53,145 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 12:17:53,145 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 12:17:53,146 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 12:17:53,146 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 12:17:53,146 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 12:17:53,146 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 12:17:53,146 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 12:17:53,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 12:17:53,147 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 12:17:53,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 12:17:53,148 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 12:17:53,148 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 12:17:53,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 12:17:53,148 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 12:17:53,148 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 12:17:53,148 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 12:17:53,148 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 12:17:53,149 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 12:17:53,149 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 12:17:53,149 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 12:17:53,149 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 12:17:53,149 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 12:17:53,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:17:53,150 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 12:17:53,150 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 12:17:53,150 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 12:17:53,150 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 12:17:53,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 12:17:53,151 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 12:17:53,151 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 12:17:53,151 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 12:17:53,151 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7385fd88a67a4d51b868c33a4a2a17411348aca1f3bf817148857f9693eef2c [2022-07-19 12:17:53,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 12:17:53,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 12:17:53,379 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 12:17:53,380 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 12:17:53,380 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 12:17:53,381 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label13.c [2022-07-19 12:17:53,426 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f2620153/d4ee923ae8364f53b99279f1251cefd9/FLAG558f7d480 [2022-07-19 12:17:53,976 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 12:17:53,977 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label13.c [2022-07-19 12:17:53,996 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f2620153/d4ee923ae8364f53b99279f1251cefd9/FLAG558f7d480 [2022-07-19 12:17:54,461 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f2620153/d4ee923ae8364f53b99279f1251cefd9 [2022-07-19 12:17:54,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 12:17:54,464 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 12:17:54,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 12:17:54,465 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 12:17:54,467 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 12:17:54,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:17:54" (1/1) ... [2022-07-19 12:17:54,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@571fbbd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:17:54, skipping insertion in model container [2022-07-19 12:17:54,469 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:17:54" (1/1) ... [2022-07-19 12:17:54,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 12:17:54,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 12:17:54,906 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/eca-rers2012/Problem13_label13.c[8099,8112] [2022-07-19 12:17:55,551 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:17:55,557 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 12:17:55,584 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/eca-rers2012/Problem13_label13.c[8099,8112] [2022-07-19 12:17:56,006 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:17:56,025 INFO L208 MainTranslator]: Completed translation [2022-07-19 12:17:56,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:17:56 WrapperNode [2022-07-19 12:17:56,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 12:17:56,027 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 12:17:56,027 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 12:17:56,027 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 12:17:56,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:17:56" (1/1) ... [2022-07-19 12:17:56,088 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:17:56" (1/1) ... [2022-07-19 12:17:56,555 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2022-07-19 12:17:56,556 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 12:17:56,556 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 12:17:56,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 12:17:56,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 12:17:56,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:17:56" (1/1) ... [2022-07-19 12:17:56,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:17:56" (1/1) ... [2022-07-19 12:17:56,751 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:17:56" (1/1) ... [2022-07-19 12:17:56,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:17:56" (1/1) ... [2022-07-19 12:17:57,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:17:56" (1/1) ... [2022-07-19 12:17:57,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:17:56" (1/1) ... [2022-07-19 12:17:57,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:17:56" (1/1) ... [2022-07-19 12:17:57,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 12:17:57,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 12:17:57,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 12:17:57,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 12:17:57,224 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:17:56" (1/1) ... [2022-07-19 12:17:57,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:17:57,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:17:57,265 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) [2022-07-19 12:17:57,293 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 [2022-07-19 12:17:57,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 12:17:57,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 12:17:57,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 12:17:57,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 12:17:57,361 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 12:17:57,362 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 12:18:00,730 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 12:18:00,743 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 12:18:00,744 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 12:18:00,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:18:00 BoogieIcfgContainer [2022-07-19 12:18:00,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 12:18:00,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 12:18:00,748 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 12:18:00,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 12:18:00,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 12:17:54" (1/3) ... [2022-07-19 12:18:00,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45473afe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:18:00, skipping insertion in model container [2022-07-19 12:18:00,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:17:56" (2/3) ... [2022-07-19 12:18:00,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45473afe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:18:00, skipping insertion in model container [2022-07-19 12:18:00,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:18:00" (3/3) ... [2022-07-19 12:18:00,753 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label13.c [2022-07-19 12:18:00,762 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 12:18:00,762 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 12:18:00,810 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 12:18:00,815 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@2865a5a9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@24632b6 [2022-07-19 12:18:00,815 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 12:18:00,822 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:00,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-19 12:18:00,828 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:18:00,829 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] [2022-07-19 12:18:00,829 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:18:00,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:18:00,833 INFO L85 PathProgramCache]: Analyzing trace with hash -66916295, now seen corresponding path program 1 times [2022-07-19 12:18:00,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:18:00,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064256924] [2022-07-19 12:18:00,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:18:00,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:18:00,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:18:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:18:01,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:18:01,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064256924] [2022-07-19 12:18:01,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064256924] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:18:01,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:18:01,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:18:01,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511889613] [2022-07-19 12:18:01,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:18:01,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:18:01,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:18:01,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:18:01,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:18:01,089 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:06,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:18:06,424 INFO L93 Difference]: Finished difference Result 3829 states and 7206 transitions. [2022-07-19 12:18:06,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:18:06,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-19 12:18:06,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:18:06,445 INFO L225 Difference]: With dead ends: 3829 [2022-07-19 12:18:06,446 INFO L226 Difference]: Without dead ends: 2664 [2022-07-19 12:18:06,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:18:06,454 INFO L413 NwaCegarLoop]: 761 mSDtfsCounter, 2676 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 4246 mSolverCounterSat, 1610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2676 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 5856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1610 IncrementalHoareTripleChecker+Valid, 4246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-07-19 12:18:06,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2676 Valid, 1067 Invalid, 5856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1610 Valid, 4246 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-07-19 12:18:06,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2022-07-19 12:18:06,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2663. [2022-07-19 12:18:06,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 1.460931630353118) internal successors, (3889), 2662 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:06,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 3889 transitions. [2022-07-19 12:18:06,547 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 3889 transitions. Word has length 57 [2022-07-19 12:18:06,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:18:06,547 INFO L495 AbstractCegarLoop]: Abstraction has 2663 states and 3889 transitions. [2022-07-19 12:18:06,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:06,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 3889 transitions. [2022-07-19 12:18:06,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-07-19 12:18:06,559 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:18:06,559 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:18:06,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 12:18:06,560 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:18:06,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:18:06,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1953647055, now seen corresponding path program 1 times [2022-07-19 12:18:06,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:18:06,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49570466] [2022-07-19 12:18:06,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:18:06,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:18:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:18:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-19 12:18:06,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:18:06,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49570466] [2022-07-19 12:18:06,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49570466] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:18:06,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:18:06,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:18:06,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186840961] [2022-07-19 12:18:06,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:18:06,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:18:06,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:18:06,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:18:06,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:18:06,841 INFO L87 Difference]: Start difference. First operand 2663 states and 3889 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:09,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:18:09,865 INFO L93 Difference]: Finished difference Result 6142 states and 9712 transitions. [2022-07-19 12:18:09,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:18:09,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 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 182 [2022-07-19 12:18:09,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:18:09,880 INFO L225 Difference]: With dead ends: 6142 [2022-07-19 12:18:09,880 INFO L226 Difference]: Without dead ends: 4268 [2022-07-19 12:18:09,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:18:09,887 INFO L413 NwaCegarLoop]: 1039 mSDtfsCounter, 743 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 2508 mSolverCounterSat, 778 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 3286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 778 IncrementalHoareTripleChecker+Valid, 2508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:18:09,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [743 Valid, 1188 Invalid, 3286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [778 Valid, 2508 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-19 12:18:09,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4268 states. [2022-07-19 12:18:09,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4268 to 4254. [2022-07-19 12:18:09,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4254 states, 4253 states have (on average 1.3515165765342112) internal successors, (5748), 4253 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:09,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4254 states to 4254 states and 5748 transitions. [2022-07-19 12:18:09,945 INFO L78 Accepts]: Start accepts. Automaton has 4254 states and 5748 transitions. Word has length 182 [2022-07-19 12:18:09,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:18:09,947 INFO L495 AbstractCegarLoop]: Abstraction has 4254 states and 5748 transitions. [2022-07-19 12:18:09,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:09,947 INFO L276 IsEmpty]: Start isEmpty. Operand 4254 states and 5748 transitions. [2022-07-19 12:18:09,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-07-19 12:18:09,950 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:18:09,951 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:18:09,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 12:18:09,952 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:18:09,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:18:09,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1535774173, now seen corresponding path program 1 times [2022-07-19 12:18:09,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:18:09,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866867393] [2022-07-19 12:18:09,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:18:09,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:18:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:18:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-19 12:18:10,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:18:10,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866867393] [2022-07-19 12:18:10,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866867393] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:18:10,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:18:10,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:18:10,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673318855] [2022-07-19 12:18:10,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:18:10,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:18:10,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:18:10,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:18:10,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:18:10,112 INFO L87 Difference]: Start difference. First operand 4254 states and 5748 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:13,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:18:13,218 INFO L93 Difference]: Finished difference Result 10897 states and 15274 transitions. [2022-07-19 12:18:13,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:18:13,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 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 224 [2022-07-19 12:18:13,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:18:13,242 INFO L225 Difference]: With dead ends: 10897 [2022-07-19 12:18:13,242 INFO L226 Difference]: Without dead ends: 7432 [2022-07-19 12:18:13,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:18:13,250 INFO L413 NwaCegarLoop]: 824 mSDtfsCounter, 905 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 2567 mSolverCounterSat, 755 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 3322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 755 IncrementalHoareTripleChecker+Valid, 2567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-19 12:18:13,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [905 Valid, 955 Invalid, 3322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [755 Valid, 2567 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-19 12:18:13,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7432 states. [2022-07-19 12:18:13,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7432 to 7426. [2022-07-19 12:18:13,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7426 states, 7425 states have (on average 1.288888888888889) internal successors, (9570), 7425 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:13,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7426 states to 7426 states and 9570 transitions. [2022-07-19 12:18:13,363 INFO L78 Accepts]: Start accepts. Automaton has 7426 states and 9570 transitions. Word has length 224 [2022-07-19 12:18:13,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:18:13,364 INFO L495 AbstractCegarLoop]: Abstraction has 7426 states and 9570 transitions. [2022-07-19 12:18:13,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:13,364 INFO L276 IsEmpty]: Start isEmpty. Operand 7426 states and 9570 transitions. [2022-07-19 12:18:13,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-07-19 12:18:13,367 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:18:13,367 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:18:13,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 12:18:13,368 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:18:13,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:18:13,370 INFO L85 PathProgramCache]: Analyzing trace with hash -424268410, now seen corresponding path program 1 times [2022-07-19 12:18:13,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:18:13,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538021896] [2022-07-19 12:18:13,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:18:13,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:18:13,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:18:13,481 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 12:18:13,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:18:13,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538021896] [2022-07-19 12:18:13,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538021896] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:18:13,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:18:13,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:18:13,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102120402] [2022-07-19 12:18:13,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:18:13,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:18:13,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:18:13,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:18:13,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:18:13,483 INFO L87 Difference]: Start difference. First operand 7426 states and 9570 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:16,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:18:16,699 INFO L93 Difference]: Finished difference Result 19619 states and 25904 transitions. [2022-07-19 12:18:16,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:18:16,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 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 238 [2022-07-19 12:18:16,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:18:16,735 INFO L225 Difference]: With dead ends: 19619 [2022-07-19 12:18:16,735 INFO L226 Difference]: Without dead ends: 12982 [2022-07-19 12:18:16,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:18:16,746 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 907 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 2889 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 3429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 2889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-19 12:18:16,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [907 Valid, 637 Invalid, 3429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 2889 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-19 12:18:16,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12982 states. [2022-07-19 12:18:16,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12982 to 12975. [2022-07-19 12:18:16,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12975 states, 12974 states have (on average 1.2719284723292739) internal successors, (16502), 12974 states have internal predecessors, (16502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:16,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12975 states to 12975 states and 16502 transitions. [2022-07-19 12:18:16,966 INFO L78 Accepts]: Start accepts. Automaton has 12975 states and 16502 transitions. Word has length 238 [2022-07-19 12:18:16,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:18:16,967 INFO L495 AbstractCegarLoop]: Abstraction has 12975 states and 16502 transitions. [2022-07-19 12:18:16,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:16,968 INFO L276 IsEmpty]: Start isEmpty. Operand 12975 states and 16502 transitions. [2022-07-19 12:18:16,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-07-19 12:18:16,971 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:18:16,971 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:18:16,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 12:18:16,971 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:18:16,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:18:16,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1333823715, now seen corresponding path program 1 times [2022-07-19 12:18:16,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:18:16,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661742004] [2022-07-19 12:18:16,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:18:16,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:18:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:18:17,090 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-07-19 12:18:17,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:18:17,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661742004] [2022-07-19 12:18:17,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661742004] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:18:17,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:18:17,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:18:17,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685034522] [2022-07-19 12:18:17,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:18:17,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:18:17,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:18:17,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:18:17,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:18:17,094 INFO L87 Difference]: Start difference. First operand 12975 states and 16502 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:20,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:18:20,124 INFO L93 Difference]: Finished difference Result 36180 states and 46592 transitions. [2022-07-19 12:18:20,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:18:20,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 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 254 [2022-07-19 12:18:20,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:18:20,165 INFO L225 Difference]: With dead ends: 36180 [2022-07-19 12:18:20,166 INFO L226 Difference]: Without dead ends: 23994 [2022-07-19 12:18:20,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:18:20,176 INFO L413 NwaCegarLoop]: 839 mSDtfsCounter, 857 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 869 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 3177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 869 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-19 12:18:20,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 986 Invalid, 3177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [869 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-19 12:18:20,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23994 states. [2022-07-19 12:18:20,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23994 to 22416. [2022-07-19 12:18:20,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22416 states, 22415 states have (on average 1.211153245594468) internal successors, (27148), 22415 states have internal predecessors, (27148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:20,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22416 states to 22416 states and 27148 transitions. [2022-07-19 12:18:20,438 INFO L78 Accepts]: Start accepts. Automaton has 22416 states and 27148 transitions. Word has length 254 [2022-07-19 12:18:20,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:18:20,439 INFO L495 AbstractCegarLoop]: Abstraction has 22416 states and 27148 transitions. [2022-07-19 12:18:20,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:20,441 INFO L276 IsEmpty]: Start isEmpty. Operand 22416 states and 27148 transitions. [2022-07-19 12:18:20,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-07-19 12:18:20,445 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:18:20,445 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:18:20,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 12:18:20,446 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:18:20,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:18:20,446 INFO L85 PathProgramCache]: Analyzing trace with hash 678495218, now seen corresponding path program 1 times [2022-07-19 12:18:20,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:18:20,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783871035] [2022-07-19 12:18:20,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:18:20,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:18:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:18:20,533 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 322 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-19 12:18:20,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:18:20,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783871035] [2022-07-19 12:18:20,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783871035] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:18:20,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:18:20,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:18:20,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436181163] [2022-07-19 12:18:20,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:18:20,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:18:20,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:18:20,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:18:20,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:18:20,536 INFO L87 Difference]: Start difference. First operand 22416 states and 27148 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:23,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:18:23,628 INFO L93 Difference]: Finished difference Result 55858 states and 69068 transitions. [2022-07-19 12:18:23,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:18:23,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 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 297 [2022-07-19 12:18:23,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:18:23,681 INFO L225 Difference]: With dead ends: 55858 [2022-07-19 12:18:23,681 INFO L226 Difference]: Without dead ends: 34231 [2022-07-19 12:18:23,707 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 [2022-07-19 12:18:23,708 INFO L413 NwaCegarLoop]: 809 mSDtfsCounter, 888 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 3295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-19 12:18:23,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 926 Invalid, 3295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [914 Valid, 2381 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-19 12:18:23,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34231 states. [2022-07-19 12:18:24,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34231 to 33434. [2022-07-19 12:18:24,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33434 states, 33433 states have (on average 1.1906200460622738) internal successors, (39806), 33433 states have internal predecessors, (39806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:24,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33434 states to 33434 states and 39806 transitions. [2022-07-19 12:18:24,281 INFO L78 Accepts]: Start accepts. Automaton has 33434 states and 39806 transitions. Word has length 297 [2022-07-19 12:18:24,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:18:24,282 INFO L495 AbstractCegarLoop]: Abstraction has 33434 states and 39806 transitions. [2022-07-19 12:18:24,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:24,282 INFO L276 IsEmpty]: Start isEmpty. Operand 33434 states and 39806 transitions. [2022-07-19 12:18:24,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-07-19 12:18:24,287 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:18:24,287 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:18:24,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 12:18:24,287 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:18:24,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:18:24,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1737785822, now seen corresponding path program 1 times [2022-07-19 12:18:24,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:18:24,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201293945] [2022-07-19 12:18:24,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:18:24,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:18:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:18:24,388 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 385 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-19 12:18:24,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:18:24,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201293945] [2022-07-19 12:18:24,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201293945] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:18:24,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:18:24,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:18:24,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171614901] [2022-07-19 12:18:24,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:18:24,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:18:24,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:18:24,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:18:24,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:18:24,390 INFO L87 Difference]: Start difference. First operand 33434 states and 39806 transitions. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:30,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:18:30,570 INFO L93 Difference]: Finished difference Result 117460 states and 141039 transitions. [2022-07-19 12:18:30,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:18:30,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 345 [2022-07-19 12:18:30,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:18:30,672 INFO L225 Difference]: With dead ends: 117460 [2022-07-19 12:18:30,672 INFO L226 Difference]: Without dead ends: 84815 [2022-07-19 12:18:30,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:18:30,703 INFO L413 NwaCegarLoop]: 489 mSDtfsCounter, 1739 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 6065 mSolverCounterSat, 1189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1739 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 7254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1189 IncrementalHoareTripleChecker+Valid, 6065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:18:30,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1739 Valid, 690 Invalid, 7254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1189 Valid, 6065 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-07-19 12:18:30,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84815 states. [2022-07-19 12:18:31,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84815 to 83900. [2022-07-19 12:18:31,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83900 states, 83899 states have (on average 1.1735539160180692) internal successors, (98460), 83899 states have internal predecessors, (98460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:32,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83900 states to 83900 states and 98460 transitions. [2022-07-19 12:18:32,092 INFO L78 Accepts]: Start accepts. Automaton has 83900 states and 98460 transitions. Word has length 345 [2022-07-19 12:18:32,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:18:32,092 INFO L495 AbstractCegarLoop]: Abstraction has 83900 states and 98460 transitions. [2022-07-19 12:18:32,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:32,093 INFO L276 IsEmpty]: Start isEmpty. Operand 83900 states and 98460 transitions. [2022-07-19 12:18:32,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2022-07-19 12:18:32,098 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:18:32,098 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:18:32,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 12:18:32,099 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:18:32,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:18:32,099 INFO L85 PathProgramCache]: Analyzing trace with hash -127471989, now seen corresponding path program 1 times [2022-07-19 12:18:32,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:18:32,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724479192] [2022-07-19 12:18:32,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:18:32,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:18:32,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:18:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 278 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-07-19 12:18:32,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:18:32,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724479192] [2022-07-19 12:18:32,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724479192] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:18:32,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:18:32,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:18:32,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129547850] [2022-07-19 12:18:32,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:18:32,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:18:32,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:18:32,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:18:32,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:18:32,305 INFO L87 Difference]: Start difference. First operand 83900 states and 98460 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:35,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:18:35,268 INFO L93 Difference]: Finished difference Result 156777 states and 185083 transitions. [2022-07-19 12:18:35,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:18:35,268 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 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 354 [2022-07-19 12:18:35,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:18:35,371 INFO L225 Difference]: With dead ends: 156777 [2022-07-19 12:18:35,372 INFO L226 Difference]: Without dead ends: 83909 [2022-07-19 12:18:35,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:18:35,446 INFO L413 NwaCegarLoop]: 1020 mSDtfsCounter, 728 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 2705 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 2709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:18:35,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 1201 Invalid, 2709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2705 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-19 12:18:35,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83909 states. [2022-07-19 12:18:36,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83909 to 83900. [2022-07-19 12:18:36,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83900 states, 83899 states have (on average 1.172779174960369) internal successors, (98395), 83899 states have internal predecessors, (98395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:36,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83900 states to 83900 states and 98395 transitions. [2022-07-19 12:18:36,497 INFO L78 Accepts]: Start accepts. Automaton has 83900 states and 98395 transitions. Word has length 354 [2022-07-19 12:18:36,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:18:36,497 INFO L495 AbstractCegarLoop]: Abstraction has 83900 states and 98395 transitions. [2022-07-19 12:18:36,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:36,497 INFO L276 IsEmpty]: Start isEmpty. Operand 83900 states and 98395 transitions. [2022-07-19 12:18:36,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-07-19 12:18:36,521 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:18:36,522 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:18:36,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 12:18:36,523 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:18:36,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:18:36,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1869300435, now seen corresponding path program 1 times [2022-07-19 12:18:36,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:18:36,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248780721] [2022-07-19 12:18:36,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:18:36,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:18:36,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:18:37,005 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 278 proven. 113 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-19 12:18:37,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:18:37,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248780721] [2022-07-19 12:18:37,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248780721] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:18:37,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805934495] [2022-07-19 12:18:37,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:18:37,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:18:37,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:18:37,007 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:18:37,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 12:18:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:18:37,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:18:37,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:18:37,308 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 278 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-07-19 12:18:37,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:18:37,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805934495] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:18:37,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:18:37,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-19 12:18:37,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996524244] [2022-07-19 12:18:37,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:18:37,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:18:37,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:18:37,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:18:37,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:18:37,311 INFO L87 Difference]: Start difference. First operand 83900 states and 98395 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:40,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:18:40,519 INFO L93 Difference]: Finished difference Result 167009 states and 195995 transitions. [2022-07-19 12:18:40,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:18:40,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 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 383 [2022-07-19 12:18:40,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:18:40,757 INFO L225 Difference]: With dead ends: 167009 [2022-07-19 12:18:40,757 INFO L226 Difference]: Without dead ends: 83898 [2022-07-19 12:18:40,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:18:40,799 INFO L413 NwaCegarLoop]: 1365 mSDtfsCounter, 1123 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2467 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1123 SdHoareTripleChecker+Valid, 1447 SdHoareTripleChecker+Invalid, 2918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 2467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:18:40,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1123 Valid, 1447 Invalid, 2918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 2467 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-19 12:18:40,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83898 states. [2022-07-19 12:18:41,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83898 to 83110. [2022-07-19 12:18:41,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83110 states, 83109 states have (on average 1.1286142295058297) internal successors, (93798), 83109 states have internal predecessors, (93798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:41,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83110 states to 83110 states and 93798 transitions. [2022-07-19 12:18:41,936 INFO L78 Accepts]: Start accepts. Automaton has 83110 states and 93798 transitions. Word has length 383 [2022-07-19 12:18:41,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:18:41,937 INFO L495 AbstractCegarLoop]: Abstraction has 83110 states and 93798 transitions. [2022-07-19 12:18:41,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:41,937 INFO L276 IsEmpty]: Start isEmpty. Operand 83110 states and 93798 transitions. [2022-07-19 12:18:41,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2022-07-19 12:18:41,944 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:18:41,944 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:18:41,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 12:18:42,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:18:42,161 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:18:42,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:18:42,162 INFO L85 PathProgramCache]: Analyzing trace with hash -289451502, now seen corresponding path program 1 times [2022-07-19 12:18:42,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:18:42,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731572332] [2022-07-19 12:18:42,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:18:42,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:18:42,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:18:42,379 INFO L134 CoverageAnalysis]: Checked inductivity of 709 backedges. 548 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-07-19 12:18:42,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:18:42,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731572332] [2022-07-19 12:18:42,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731572332] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:18:42,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:18:42,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:18:42,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941347821] [2022-07-19 12:18:42,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:18:42,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:18:42,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:18:42,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:18:42,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:18:42,382 INFO L87 Difference]: Start difference. First operand 83110 states and 93798 transitions. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:46,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:18:46,147 INFO L93 Difference]: Finished difference Result 191411 states and 218503 transitions. [2022-07-19 12:18:46,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:18:46,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 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 413 [2022-07-19 12:18:46,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:18:46,301 INFO L225 Difference]: With dead ends: 191411 [2022-07-19 12:18:46,301 INFO L226 Difference]: Without dead ends: 109090 [2022-07-19 12:18:46,351 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 [2022-07-19 12:18:46,352 INFO L413 NwaCegarLoop]: 859 mSDtfsCounter, 892 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2423 mSolverCounterSat, 933 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 3356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 933 IncrementalHoareTripleChecker+Valid, 2423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-19 12:18:46,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [892 Valid, 944 Invalid, 3356 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [933 Valid, 2423 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-19 12:18:46,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109090 states. [2022-07-19 12:18:47,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109090 to 107496. [2022-07-19 12:18:47,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107496 states, 107495 states have (on average 1.13280617703149) internal successors, (121771), 107495 states have internal predecessors, (121771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:47,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107496 states to 107496 states and 121771 transitions. [2022-07-19 12:18:47,763 INFO L78 Accepts]: Start accepts. Automaton has 107496 states and 121771 transitions. Word has length 413 [2022-07-19 12:18:47,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:18:47,765 INFO L495 AbstractCegarLoop]: Abstraction has 107496 states and 121771 transitions. [2022-07-19 12:18:47,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:47,765 INFO L276 IsEmpty]: Start isEmpty. Operand 107496 states and 121771 transitions. [2022-07-19 12:18:47,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2022-07-19 12:18:47,784 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:18:47,785 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:18:47,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 12:18:47,786 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:18:47,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:18:47,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1031117907, now seen corresponding path program 1 times [2022-07-19 12:18:47,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:18:47,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532004137] [2022-07-19 12:18:47,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:18:47,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:18:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:18:48,268 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 446 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-07-19 12:18:48,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:18:48,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532004137] [2022-07-19 12:18:48,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532004137] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:18:48,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:18:48,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:18:48,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334649560] [2022-07-19 12:18:48,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:18:48,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:18:48,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:18:48,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:18:48,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:18:48,271 INFO L87 Difference]: Start difference. First operand 107496 states and 121771 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:52,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:18:52,289 INFO L93 Difference]: Finished difference Result 239402 states and 273697 transitions. [2022-07-19 12:18:52,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:18:52,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 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 451 [2022-07-19 12:18:52,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:18:52,481 INFO L225 Difference]: With dead ends: 239402 [2022-07-19 12:18:52,482 INFO L226 Difference]: Without dead ends: 132695 [2022-07-19 12:18:52,548 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 [2022-07-19 12:18:52,558 INFO L413 NwaCegarLoop]: 1787 mSDtfsCounter, 781 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2555 mSolverCounterSat, 715 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 1938 SdHoareTripleChecker+Invalid, 3270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 715 IncrementalHoareTripleChecker+Valid, 2555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-19 12:18:52,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [781 Valid, 1938 Invalid, 3270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [715 Valid, 2555 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-19 12:18:52,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132695 states. [2022-07-19 12:18:53,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132695 to 132678. [2022-07-19 12:18:54,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132678 states, 132677 states have (on average 1.1164859018518658) internal successors, (148132), 132677 states have internal predecessors, (148132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:54,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132678 states to 132678 states and 148132 transitions. [2022-07-19 12:18:54,203 INFO L78 Accepts]: Start accepts. Automaton has 132678 states and 148132 transitions. Word has length 451 [2022-07-19 12:18:54,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:18:54,227 INFO L495 AbstractCegarLoop]: Abstraction has 132678 states and 148132 transitions. [2022-07-19 12:18:54,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:54,228 INFO L276 IsEmpty]: Start isEmpty. Operand 132678 states and 148132 transitions. [2022-07-19 12:18:54,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2022-07-19 12:18:54,251 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:18:54,251 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:18:54,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 12:18:54,252 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:18:54,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:18:54,252 INFO L85 PathProgramCache]: Analyzing trace with hash 581013402, now seen corresponding path program 1 times [2022-07-19 12:18:54,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:18:54,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206878313] [2022-07-19 12:18:54,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:18:54,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:18:54,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:18:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 347 proven. 113 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-19 12:18:54,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:18:54,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206878313] [2022-07-19 12:18:54,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206878313] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:18:54,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624623275] [2022-07-19 12:18:54,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:18:54,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:18:54,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:18:54,849 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:18:54,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 12:18:54,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:18:54,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:18:54,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:18:55,191 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 402 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-19 12:18:55,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:18:55,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624623275] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:18:55,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:18:55,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-19 12:18:55,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59661131] [2022-07-19 12:18:55,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:18:55,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:18:55,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:18:55,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:18:55,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:18:55,193 INFO L87 Difference]: Start difference. First operand 132678 states and 148132 transitions. Second operand has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:18:58,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:18:58,346 INFO L93 Difference]: Finished difference Result 259020 states and 291117 transitions. [2022-07-19 12:18:58,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:18:58,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 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 487 [2022-07-19 12:18:58,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:18:58,521 INFO L225 Difference]: With dead ends: 259020 [2022-07-19 12:18:58,522 INFO L226 Difference]: Without dead ends: 142879 [2022-07-19 12:18:58,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:18:58,594 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 1135 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 2259 mSolverCounterSat, 853 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 3112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 853 IncrementalHoareTripleChecker+Valid, 2259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-19 12:18:58,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1135 Valid, 389 Invalid, 3112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [853 Valid, 2259 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-19 12:18:58,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142879 states. [2022-07-19 12:18:59,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142879 to 142879. [2022-07-19 12:19:00,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142879 states, 142878 states have (on average 1.1109408026428143) internal successors, (158729), 142878 states have internal predecessors, (158729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:19:00,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142879 states to 142879 states and 158729 transitions. [2022-07-19 12:19:00,211 INFO L78 Accepts]: Start accepts. Automaton has 142879 states and 158729 transitions. Word has length 487 [2022-07-19 12:19:00,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:19:00,211 INFO L495 AbstractCegarLoop]: Abstraction has 142879 states and 158729 transitions. [2022-07-19 12:19:00,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:19:00,212 INFO L276 IsEmpty]: Start isEmpty. Operand 142879 states and 158729 transitions. [2022-07-19 12:19:00,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2022-07-19 12:19:00,224 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:19:00,225 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:19:00,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-19 12:19:00,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 12:19:00,442 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:19:00,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:19:00,450 INFO L85 PathProgramCache]: Analyzing trace with hash -777668327, now seen corresponding path program 1 times [2022-07-19 12:19:00,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:19:00,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077117385] [2022-07-19 12:19:00,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:19:00,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:19:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:19:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 179 proven. 258 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 12:19:01,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:19:01,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077117385] [2022-07-19 12:19:01,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077117385] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:19:01,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179288091] [2022-07-19 12:19:01,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:19:01,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:19:01,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:19:01,256 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:19:01,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 12:19:01,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:19:01,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 12:19:01,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:19:02,314 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 260 proven. 0 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-07-19 12:19:02,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:19:02,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179288091] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:19:02,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:19:02,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-19 12:19:02,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308475463] [2022-07-19 12:19:02,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:19:02,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:19:02,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:19:02,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:19:02,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:19:02,320 INFO L87 Difference]: Start difference. First operand 142879 states and 158729 transitions. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 2 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:19:05,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:19:05,490 INFO L93 Difference]: Finished difference Result 273170 states and 304378 transitions. [2022-07-19 12:19:05,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:19:05,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 2 states have internal predecessors, (345), 0 states have call successors, (0), 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 522 [2022-07-19 12:19:05,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:19:05,694 INFO L225 Difference]: With dead ends: 273170 [2022-07-19 12:19:05,695 INFO L226 Difference]: Without dead ends: 146828 [2022-07-19 12:19:05,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:19:05,785 INFO L413 NwaCegarLoop]: 1012 mSDtfsCounter, 544 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 2448 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 2557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-19 12:19:05,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 1142 Invalid, 2557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2448 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-19 12:19:06,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146828 states. [2022-07-19 12:19:07,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146828 to 146818. [2022-07-19 12:19:07,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146818 states, 146817 states have (on average 1.1091903526158415) internal successors, (162848), 146817 states have internal predecessors, (162848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:19:07,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146818 states to 146818 states and 162848 transitions. [2022-07-19 12:19:07,777 INFO L78 Accepts]: Start accepts. Automaton has 146818 states and 162848 transitions. Word has length 522 [2022-07-19 12:19:07,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:19:07,777 INFO L495 AbstractCegarLoop]: Abstraction has 146818 states and 162848 transitions. [2022-07-19 12:19:07,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 2 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:19:07,778 INFO L276 IsEmpty]: Start isEmpty. Operand 146818 states and 162848 transitions. [2022-07-19 12:19:07,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2022-07-19 12:19:07,791 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:19:07,791 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:19:07,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 12:19:08,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:19:08,008 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:19:08,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:19:08,009 INFO L85 PathProgramCache]: Analyzing trace with hash -2017215681, now seen corresponding path program 1 times [2022-07-19 12:19:08,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:19:08,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157329019] [2022-07-19 12:19:08,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:19:08,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:19:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:19:08,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 274 proven. 0 refuted. 0 times theorem prover too weak. 757 trivial. 0 not checked. [2022-07-19 12:19:08,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:19:08,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157329019] [2022-07-19 12:19:08,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157329019] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:19:08,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:19:08,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:19:08,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742343835] [2022-07-19 12:19:08,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:19:08,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:19:08,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:19:08,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:19:08,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:19:08,580 INFO L87 Difference]: Start difference. First operand 146818 states and 162848 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:19:11,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:19:11,088 INFO L93 Difference]: Finished difference Result 275508 states and 306386 transitions. [2022-07-19 12:19:11,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:19:11,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 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 542 [2022-07-19 12:19:11,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:19:11,295 INFO L225 Difference]: With dead ends: 275508 [2022-07-19 12:19:11,295 INFO L226 Difference]: Without dead ends: 145227 [2022-07-19 12:19:11,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:19:11,363 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 1633 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1633 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:19:11,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1633 Valid, 297 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1500 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-19 12:19:11,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145227 states. [2022-07-19 12:19:12,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145227 to 145226. [2022-07-19 12:19:12,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145226 states, 145225 states have (on average 1.1071647443621966) internal successors, (160788), 145225 states have internal predecessors, (160788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:19:13,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145226 states to 145226 states and 160788 transitions. [2022-07-19 12:19:13,056 INFO L78 Accepts]: Start accepts. Automaton has 145226 states and 160788 transitions. Word has length 542 [2022-07-19 12:19:13,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:19:13,056 INFO L495 AbstractCegarLoop]: Abstraction has 145226 states and 160788 transitions. [2022-07-19 12:19:13,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:19:13,056 INFO L276 IsEmpty]: Start isEmpty. Operand 145226 states and 160788 transitions. [2022-07-19 12:19:13,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2022-07-19 12:19:13,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:19:13,072 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:19:13,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 12:19:13,072 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:19:13,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:19:13,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1742141744, now seen corresponding path program 1 times [2022-07-19 12:19:13,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:19:13,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287389001] [2022-07-19 12:19:13,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:19:13,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:19:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:19:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 848 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2022-07-19 12:19:13,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:19:13,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287389001] [2022-07-19 12:19:13,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287389001] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:19:13,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:19:13,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:19:13,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165630991] [2022-07-19 12:19:13,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:19:13,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:19:13,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:19:13,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:19:13,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:19:13,631 INFO L87 Difference]: Start difference. First operand 145226 states and 160788 transitions. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:19:17,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:19:17,179 INFO L93 Difference]: Finished difference Result 289670 states and 320797 transitions. [2022-07-19 12:19:17,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:19:17,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 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 580 [2022-07-19 12:19:17,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:19:17,371 INFO L225 Difference]: With dead ends: 289670 [2022-07-19 12:19:17,371 INFO L226 Difference]: Without dead ends: 145233 [2022-07-19 12:19:17,415 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 [2022-07-19 12:19:17,416 INFO L413 NwaCegarLoop]: 1353 mSDtfsCounter, 831 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2446 mSolverCounterSat, 604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 1434 SdHoareTripleChecker+Invalid, 3050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 604 IncrementalHoareTripleChecker+Valid, 2446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:19:17,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 1434 Invalid, 3050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [604 Valid, 2446 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-19 12:19:17,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145233 states. [2022-07-19 12:19:18,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145233 to 145219. [2022-07-19 12:19:19,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145219 states, 145218 states have (on average 1.0820215124846781) internal successors, (157129), 145218 states have internal predecessors, (157129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:19:19,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145219 states to 145219 states and 157129 transitions. [2022-07-19 12:19:19,574 INFO L78 Accepts]: Start accepts. Automaton has 145219 states and 157129 transitions. Word has length 580 [2022-07-19 12:19:19,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:19:19,574 INFO L495 AbstractCegarLoop]: Abstraction has 145219 states and 157129 transitions. [2022-07-19 12:19:19,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:19:19,574 INFO L276 IsEmpty]: Start isEmpty. Operand 145219 states and 157129 transitions. [2022-07-19 12:19:19,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2022-07-19 12:19:19,594 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:19:19,594 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:19:19,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 12:19:19,594 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:19:19,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:19:19,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1217140258, now seen corresponding path program 1 times [2022-07-19 12:19:19,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:19:19,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001249700] [2022-07-19 12:19:19,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:19:19,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:19:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:19:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 561 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-07-19 12:19:19,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:19:19,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001249700] [2022-07-19 12:19:19,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001249700] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:19:19,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:19:19,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:19:19,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594205410] [2022-07-19 12:19:19,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:19:19,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:19:19,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:19:19,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:19:19,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:19:19,717 INFO L87 Difference]: Start difference. First operand 145219 states and 157129 transitions. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:19:23,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:19:23,204 INFO L93 Difference]: Finished difference Result 294347 states and 318148 transitions. [2022-07-19 12:19:23,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:19:23,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 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 611 [2022-07-19 12:19:23,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:19:23,391 INFO L225 Difference]: With dead ends: 294347 [2022-07-19 12:19:23,391 INFO L226 Difference]: Without dead ends: 146766 [2022-07-19 12:19:23,445 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 [2022-07-19 12:19:23,446 INFO L413 NwaCegarLoop]: 1456 mSDtfsCounter, 996 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 2325 mSolverCounterSat, 588 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 588 IncrementalHoareTripleChecker+Valid, 2325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:19:23,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [996 Valid, 1579 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [588 Valid, 2325 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-19 12:19:23,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146766 states. [2022-07-19 12:19:24,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146766 to 142036. [2022-07-19 12:19:24,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142036 states, 142035 states have (on average 1.0525011440842047) internal successors, (149492), 142035 states have internal predecessors, (149492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:19:25,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142036 states to 142036 states and 149492 transitions. [2022-07-19 12:19:25,467 INFO L78 Accepts]: Start accepts. Automaton has 142036 states and 149492 transitions. Word has length 611 [2022-07-19 12:19:25,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:19:25,468 INFO L495 AbstractCegarLoop]: Abstraction has 142036 states and 149492 transitions. [2022-07-19 12:19:25,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:19:25,468 INFO L276 IsEmpty]: Start isEmpty. Operand 142036 states and 149492 transitions. [2022-07-19 12:19:25,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 656 [2022-07-19 12:19:25,505 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:19:25,505 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:19:25,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 12:19:25,505 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:19:25,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:19:25,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1562944921, now seen corresponding path program 1 times [2022-07-19 12:19:25,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:19:25,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458414298] [2022-07-19 12:19:25,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:19:25,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:19:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:19:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 798 proven. 75 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-07-19 12:19:25,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:19:25,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458414298] [2022-07-19 12:19:25,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458414298] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:19:25,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169491665] [2022-07-19 12:19:25,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:19:25,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:19:25,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:19:25,804 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:19:25,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process