./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem19_label52.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/Problem19_label52.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 7d08753ec3d09588e14fe223037879a9e4c26dd4e0293239a5101a4dc04bd1c9 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 13:12:55,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 13:12:55,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 13:12:55,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 13:12:55,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 13:12:55,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 13:12:55,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 13:12:55,343 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 13:12:55,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 13:12:55,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 13:12:55,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 13:12:55,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 13:12:55,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 13:12:55,352 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 13:12:55,354 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 13:12:55,356 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 13:12:55,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 13:12:55,358 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 13:12:55,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 13:12:55,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 13:12:55,366 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 13:12:55,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 13:12:55,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 13:12:55,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 13:12:55,369 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 13:12:55,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 13:12:55,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 13:12:55,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 13:12:55,372 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 13:12:55,372 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 13:12:55,373 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 13:12:55,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 13:12:55,374 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 13:12:55,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 13:12:55,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 13:12:55,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 13:12:55,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 13:12:55,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 13:12:55,376 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 13:12:55,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 13:12:55,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 13:12:55,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 13:12:55,380 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 13:12:55,402 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 13:12:55,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 13:12:55,403 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 13:12:55,403 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 13:12:55,404 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 13:12:55,404 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 13:12:55,404 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 13:12:55,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 13:12:55,404 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 13:12:55,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 13:12:55,405 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 13:12:55,406 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 13:12:55,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 13:12:55,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 13:12:55,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 13:12:55,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 13:12:55,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 13:12:55,406 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 13:12:55,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 13:12:55,407 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 13:12:55,407 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 13:12:55,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 13:12:55,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 13:12:55,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 13:12:55,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 13:12:55,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 13:12:55,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 13:12:55,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 13:12:55,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 13:12:55,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 13:12:55,410 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 13:12:55,410 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 13:12:55,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 13:12:55,410 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7d08753ec3d09588e14fe223037879a9e4c26dd4e0293239a5101a4dc04bd1c9 [2022-07-22 13:12:55,627 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 13:12:55,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 13:12:55,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 13:12:55,657 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 13:12:55,658 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 13:12:55,659 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label52.c [2022-07-22 13:12:55,710 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3900f0d9/d3a28ad934144a279c6e277bbb93c89d/FLAGf41efefdf [2022-07-22 13:12:56,385 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 13:12:56,385 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label52.c [2022-07-22 13:12:56,424 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3900f0d9/d3a28ad934144a279c6e277bbb93c89d/FLAGf41efefdf [2022-07-22 13:12:56,453 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3900f0d9/d3a28ad934144a279c6e277bbb93c89d [2022-07-22 13:12:56,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 13:12:56,457 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 13:12:56,458 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 13:12:56,458 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 13:12:56,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 13:12:56,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 01:12:56" (1/1) ... [2022-07-22 13:12:56,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49a7d24c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:12:56, skipping insertion in model container [2022-07-22 13:12:56,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 01:12:56" (1/1) ... [2022-07-22 13:12:56,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 13:12:56,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 13:12:56,858 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/Problem19_label52.c[7226,7239] [2022-07-22 13:12:57,719 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 13:12:57,726 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 13:12:57,754 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/Problem19_label52.c[7226,7239] [2022-07-22 13:12:58,312 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 13:12:58,337 INFO L208 MainTranslator]: Completed translation [2022-07-22 13:12:58,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:12:58 WrapperNode [2022-07-22 13:12:58,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 13:12:58,339 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 13:12:58,339 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 13:12:58,339 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 13:12:58,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:12:58" (1/1) ... [2022-07-22 13:12:58,412 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:12:58" (1/1) ... [2022-07-22 13:12:59,048 INFO L137 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2022-07-22 13:12:59,049 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 13:12:59,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 13:12:59,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 13:12:59,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 13:12:59,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:12:58" (1/1) ... [2022-07-22 13:12:59,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:12:58" (1/1) ... [2022-07-22 13:12:59,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:12:58" (1/1) ... [2022-07-22 13:12:59,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:12:58" (1/1) ... [2022-07-22 13:12:59,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:12:58" (1/1) ... [2022-07-22 13:12:59,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:12:58" (1/1) ... [2022-07-22 13:12:59,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:12:58" (1/1) ... [2022-07-22 13:12:59,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 13:12:59,894 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 13:12:59,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 13:12:59,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 13:12:59,895 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:12:58" (1/1) ... [2022-07-22 13:12:59,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 13:12:59,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 13:12:59,943 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) [2022-07-22 13:12:59,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 13:12:59,957 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 [2022-07-22 13:12:59,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 13:12:59,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 13:12:59,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 13:13:00,073 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 13:13:00,092 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 13:13:05,562 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 13:13:05,580 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 13:13:05,580 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 13:13:05,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 01:13:05 BoogieIcfgContainer [2022-07-22 13:13:05,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 13:13:05,584 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 13:13:05,584 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 13:13:05,587 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 13:13:05,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 01:12:56" (1/3) ... [2022-07-22 13:13:05,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b1b0f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 01:13:05, skipping insertion in model container [2022-07-22 13:13:05,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:12:58" (2/3) ... [2022-07-22 13:13:05,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b1b0f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 01:13:05, skipping insertion in model container [2022-07-22 13:13:05,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 01:13:05" (3/3) ... [2022-07-22 13:13:05,589 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label52.c [2022-07-22 13:13:05,598 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 13:13:05,598 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 13:13:05,647 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 13:13:05,651 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@65637115, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5561080b [2022-07-22 13:13:05,651 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 13:13:05,658 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:13:05,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-22 13:13:05,665 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:13:05,665 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:13:05,666 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:13:05,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:13:05,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1246856209, now seen corresponding path program 1 times [2022-07-22 13:13:05,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:13:05,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179590643] [2022-07-22 13:13:05,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:13:05,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:13:05,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:13:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 13:13:05,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:13:05,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179590643] [2022-07-22 13:13:05,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179590643] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:13:05,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:13:05,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 13:13:05,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813183999] [2022-07-22 13:13:05,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:13:05,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:13:05,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:13:05,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:13:05,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 13:13:05,873 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 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 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:13:11,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:13:11,942 INFO L93 Difference]: Finished difference Result 4957 states and 9398 transitions. [2022-07-22 13:13:11,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:13:11,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-22 13:13:11,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:13:11,968 INFO L225 Difference]: With dead ends: 4957 [2022-07-22 13:13:11,968 INFO L226 Difference]: Without dead ends: 3129 [2022-07-22 13:13:11,975 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 [2022-07-22 13:13:11,977 INFO L413 NwaCegarLoop]: 1373 mSDtfsCounter, 1571 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 4344 mSolverCounterSat, 1517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1571 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 5861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1517 IncrementalHoareTripleChecker+Valid, 4344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-07-22 13:13:11,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1571 Valid, 1595 Invalid, 5861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1517 Valid, 4344 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-07-22 13:13:11,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2022-07-22 13:13:12,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3108. [2022-07-22 13:13:12,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3107 states have (on average 1.6012230447376892) internal successors, (4975), 3107 states have internal predecessors, (4975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:13:12,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 4975 transitions. [2022-07-22 13:13:12,082 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 4975 transitions. Word has length 55 [2022-07-22 13:13:12,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:13:12,082 INFO L495 AbstractCegarLoop]: Abstraction has 3108 states and 4975 transitions. [2022-07-22 13:13:12,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:13:12,083 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 4975 transitions. [2022-07-22 13:13:12,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-22 13:13:12,085 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:13:12,086 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:13:12,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 13:13:12,086 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:13:12,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:13:12,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1604718068, now seen corresponding path program 1 times [2022-07-22 13:13:12,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:13:12,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747674810] [2022-07-22 13:13:12,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:13:12,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:13:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:13:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 13:13:12,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:13:12,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747674810] [2022-07-22 13:13:12,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747674810] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:13:12,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:13:12,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 13:13:12,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997500951] [2022-07-22 13:13:12,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:13:12,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 13:13:12,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:13:12,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 13:13:12,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 13:13:12,190 INFO L87 Difference]: Start difference. First operand 3108 states and 4975 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:13:21,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:13:21,110 INFO L93 Difference]: Finished difference Result 10359 states and 16187 transitions. [2022-07-22 13:13:21,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 13:13:21,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2022-07-22 13:13:21,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:13:21,133 INFO L225 Difference]: With dead ends: 10359 [2022-07-22 13:13:21,133 INFO L226 Difference]: Without dead ends: 7253 [2022-07-22 13:13:21,139 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 [2022-07-22 13:13:21,140 INFO L413 NwaCegarLoop]: 1024 mSDtfsCounter, 4321 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 9504 mSolverCounterSat, 1500 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4321 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 11004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1500 IncrementalHoareTripleChecker+Valid, 9504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-07-22 13:13:21,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4321 Valid, 1292 Invalid, 11004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1500 Valid, 9504 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2022-07-22 13:13:21,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7253 states. [2022-07-22 13:13:21,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7253 to 7249. [2022-07-22 13:13:21,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7249 states, 7248 states have (on average 1.4503311258278146) internal successors, (10512), 7248 states have internal predecessors, (10512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:13:21,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7249 states to 7249 states and 10512 transitions. [2022-07-22 13:13:21,269 INFO L78 Accepts]: Start accepts. Automaton has 7249 states and 10512 transitions. Word has length 122 [2022-07-22 13:13:21,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:13:21,271 INFO L495 AbstractCegarLoop]: Abstraction has 7249 states and 10512 transitions. [2022-07-22 13:13:21,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:13:21,271 INFO L276 IsEmpty]: Start isEmpty. Operand 7249 states and 10512 transitions. [2022-07-22 13:13:21,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-07-22 13:13:21,280 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:13:21,281 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, 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, 1, 1, 1] [2022-07-22 13:13:21,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 13:13:21,283 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:13:21,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:13:21,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1152810954, now seen corresponding path program 1 times [2022-07-22 13:13:21,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:13:21,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074592155] [2022-07-22 13:13:21,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:13:21,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:13:21,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:13:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-22 13:13:21,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:13:21,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074592155] [2022-07-22 13:13:21,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074592155] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:13:21,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:13:21,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 13:13:21,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998490429] [2022-07-22 13:13:21,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:13:21,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 13:13:21,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:13:21,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 13:13:21,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 13:13:21,600 INFO L87 Difference]: Start difference. First operand 7249 states and 10512 transitions. Second operand has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:13:29,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:13:29,838 INFO L93 Difference]: Finished difference Result 17269 states and 24867 transitions. [2022-07-22 13:13:29,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 13:13:29,843 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 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 329 [2022-07-22 13:13:29,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:13:29,874 INFO L225 Difference]: With dead ends: 17269 [2022-07-22 13:13:29,874 INFO L226 Difference]: Without dead ends: 11387 [2022-07-22 13:13:29,881 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 [2022-07-22 13:13:29,885 INFO L413 NwaCegarLoop]: 1803 mSDtfsCounter, 3755 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 9455 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3755 SdHoareTripleChecker+Valid, 2157 SdHoareTripleChecker+Invalid, 9886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 9455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-07-22 13:13:29,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3755 Valid, 2157 Invalid, 9886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 9455 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-07-22 13:13:29,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11387 states. [2022-07-22 13:13:30,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11387 to 11367. [2022-07-22 13:13:30,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11367 states, 11366 states have (on average 1.3286116487770543) internal successors, (15101), 11366 states have internal predecessors, (15101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:13:30,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11367 states to 11367 states and 15101 transitions. [2022-07-22 13:13:30,052 INFO L78 Accepts]: Start accepts. Automaton has 11367 states and 15101 transitions. Word has length 329 [2022-07-22 13:13:30,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:13:30,053 INFO L495 AbstractCegarLoop]: Abstraction has 11367 states and 15101 transitions. [2022-07-22 13:13:30,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:13:30,054 INFO L276 IsEmpty]: Start isEmpty. Operand 11367 states and 15101 transitions. [2022-07-22 13:13:30,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2022-07-22 13:13:30,056 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:13:30,057 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:13:30,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 13:13:30,058 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:13:30,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:13:30,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1180990372, now seen corresponding path program 1 times [2022-07-22 13:13:30,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:13:30,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396248041] [2022-07-22 13:13:30,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:13:30,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:13:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:13:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-22 13:13:30,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:13:30,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396248041] [2022-07-22 13:13:30,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396248041] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:13:30,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:13:30,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 13:13:30,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541764744] [2022-07-22 13:13:30,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:13:30,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 13:13:30,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:13:30,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 13:13:30,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 13:13:30,271 INFO L87 Difference]: Start difference. First operand 11367 states and 15101 transitions. Second operand has 4 states, 4 states have (on average 82.75) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:13:36,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:13:36,489 INFO L93 Difference]: Finished difference Result 20033 states and 27483 transitions. [2022-07-22 13:13:36,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 13:13:36,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 82.75) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 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 357 [2022-07-22 13:13:36,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:13:36,521 INFO L225 Difference]: With dead ends: 20033 [2022-07-22 13:13:36,521 INFO L226 Difference]: Without dead ends: 11367 [2022-07-22 13:13:36,533 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 [2022-07-22 13:13:36,533 INFO L413 NwaCegarLoop]: 1775 mSDtfsCounter, 1140 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 7325 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 2117 SdHoareTripleChecker+Invalid, 7333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 7325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-07-22 13:13:36,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1140 Valid, 2117 Invalid, 7333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 7325 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-07-22 13:13:36,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11367 states. [2022-07-22 13:13:36,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11367 to 11367. [2022-07-22 13:13:36,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11367 states, 11366 states have (on average 1.3274678866795706) internal successors, (15088), 11366 states have internal predecessors, (15088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:13:36,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11367 states to 11367 states and 15088 transitions. [2022-07-22 13:13:36,684 INFO L78 Accepts]: Start accepts. Automaton has 11367 states and 15088 transitions. Word has length 357 [2022-07-22 13:13:36,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:13:36,685 INFO L495 AbstractCegarLoop]: Abstraction has 11367 states and 15088 transitions. [2022-07-22 13:13:36,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.75) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:13:36,685 INFO L276 IsEmpty]: Start isEmpty. Operand 11367 states and 15088 transitions. [2022-07-22 13:13:36,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2022-07-22 13:13:36,690 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:13:36,691 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:13:36,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 13:13:36,691 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:13:36,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:13:36,692 INFO L85 PathProgramCache]: Analyzing trace with hash 507263328, now seen corresponding path program 1 times [2022-07-22 13:13:36,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:13:36,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182859788] [2022-07-22 13:13:36,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:13:36,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:13:36,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:13:36,941 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 13:13:36,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:13:36,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182859788] [2022-07-22 13:13:36,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182859788] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 13:13:36,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89693240] [2022-07-22 13:13:36,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:13:36,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 13:13:36,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 13:13:36,948 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) [2022-07-22 13:13:36,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 13:13:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:13:37,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 13:13:37,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 13:13:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-22 13:13:37,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 13:13:37,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89693240] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:13:37,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 13:13:37,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-22 13:13:37,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974994674] [2022-07-22 13:13:37,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:13:37,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:13:37,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:13:37,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:13:37,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 13:13:37,703 INFO L87 Difference]: Start difference. First operand 11367 states and 15088 transitions. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:13:42,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:13:42,568 INFO L93 Difference]: Finished difference Result 24133 states and 33157 transitions. [2022-07-22 13:13:42,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:13:42,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 0 states have call successors, (0), 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 [2022-07-22 13:13:42,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:13:42,610 INFO L225 Difference]: With dead ends: 24133 [2022-07-22 13:13:42,610 INFO L226 Difference]: Without dead ends: 15498 [2022-07-22 13:13:42,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 541 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 13:13:42,622 INFO L413 NwaCegarLoop]: 1207 mSDtfsCounter, 1058 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 4576 mSolverCounterSat, 809 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 1384 SdHoareTripleChecker+Invalid, 5385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 809 IncrementalHoareTripleChecker+Valid, 4576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-07-22 13:13:42,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1058 Valid, 1384 Invalid, 5385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [809 Valid, 4576 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-07-22 13:13:42,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15498 states. [2022-07-22 13:13:42,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15498 to 15496. [2022-07-22 13:13:42,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15496 states, 15495 states have (on average 1.2933849628912553) internal successors, (20041), 15495 states have internal predecessors, (20041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:13:42,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15496 states to 15496 states and 20041 transitions. [2022-07-22 13:13:42,812 INFO L78 Accepts]: Start accepts. Automaton has 15496 states and 20041 transitions. Word has length 542 [2022-07-22 13:13:42,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:13:42,817 INFO L495 AbstractCegarLoop]: Abstraction has 15496 states and 20041 transitions. [2022-07-22 13:13:42,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:13:42,818 INFO L276 IsEmpty]: Start isEmpty. Operand 15496 states and 20041 transitions. [2022-07-22 13:13:42,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2022-07-22 13:13:42,824 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:13:42,824 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:13:42,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 13:13:43,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 13:13:43,040 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:13:43,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:13:43,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1923004853, now seen corresponding path program 1 times [2022-07-22 13:13:43,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:13:43,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372212446] [2022-07-22 13:13:43,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:13:43,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:13:43,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:13:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 127 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 13:13:43,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:13:43,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372212446] [2022-07-22 13:13:43,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372212446] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 13:13:43,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811882632] [2022-07-22 13:13:43,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:13:43,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 13:13:43,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 13:13:43,296 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) [2022-07-22 13:13:43,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 13:13:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:13:43,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 13:13:43,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 13:13:43,530 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 13:13:43,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 13:13:43,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811882632] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:13:43,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 13:13:43,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-22 13:13:43,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914236194] [2022-07-22 13:13:43,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:13:43,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:13:43,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:13:43,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:13:43,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-22 13:13:43,532 INFO L87 Difference]: Start difference. First operand 15496 states and 20041 transitions. Second operand has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:13:48,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:13:48,845 INFO L93 Difference]: Finished difference Result 40540 states and 53991 transitions. [2022-07-22 13:13:48,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:13:48,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 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 [2022-07-22 13:13:48,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:13:48,888 INFO L225 Difference]: With dead ends: 40540 [2022-07-22 13:13:48,888 INFO L226 Difference]: Without dead ends: 27776 [2022-07-22 13:13:48,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 610 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-22 13:13:48,898 INFO L413 NwaCegarLoop]: 705 mSDtfsCounter, 2531 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 4053 mSolverCounterSat, 1472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2531 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 5525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1472 IncrementalHoareTripleChecker+Valid, 4053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-07-22 13:13:48,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2531 Valid, 814 Invalid, 5525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1472 Valid, 4053 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-07-22 13:13:48,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27776 states. [2022-07-22 13:13:49,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27776 to 27772. [2022-07-22 13:13:49,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27772 states, 27771 states have (on average 1.2915271326203595) internal successors, (35867), 27771 states have internal predecessors, (35867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:13:49,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27772 states to 27772 states and 35867 transitions. [2022-07-22 13:13:49,196 INFO L78 Accepts]: Start accepts. Automaton has 27772 states and 35867 transitions. Word has length 611 [2022-07-22 13:13:49,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:13:49,197 INFO L495 AbstractCegarLoop]: Abstraction has 27772 states and 35867 transitions. [2022-07-22 13:13:49,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:13:49,197 INFO L276 IsEmpty]: Start isEmpty. Operand 27772 states and 35867 transitions. [2022-07-22 13:13:49,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2022-07-22 13:13:49,208 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:13:49,209 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:13:49,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 13:13:49,426 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,SelfDestructingSolverStorable5 [2022-07-22 13:13:49,426 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:13:49,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:13:49,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1271826734, now seen corresponding path program 1 times [2022-07-22 13:13:49,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:13:49,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667419157] [2022-07-22 13:13:49,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:13:49,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:13:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:13:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-22 13:13:49,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:13:49,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667419157] [2022-07-22 13:13:49,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667419157] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:13:49,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:13:49,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 13:13:49,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148050230] [2022-07-22 13:13:49,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:13:49,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:13:49,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:13:49,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:13:49,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 13:13:49,647 INFO L87 Difference]: Start difference. First operand 27772 states and 35867 transitions. Second operand has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 2 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:13:54,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:13:54,256 INFO L93 Difference]: Finished difference Result 58285 states and 75896 transitions. [2022-07-22 13:13:54,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:13:54,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 2 states have internal predecessors, (544), 0 states have call successors, (0), 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 616 [2022-07-22 13:13:54,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:13:54,302 INFO L225 Difference]: With dead ends: 58285 [2022-07-22 13:13:54,302 INFO L226 Difference]: Without dead ends: 33245 [2022-07-22 13:13:54,327 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 [2022-07-22 13:13:54,328 INFO L413 NwaCegarLoop]: 687 mSDtfsCounter, 1383 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 3925 mSolverCounterSat, 1660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1383 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 5585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1660 IncrementalHoareTripleChecker+Valid, 3925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-22 13:13:54,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1383 Valid, 733 Invalid, 5585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1660 Valid, 3925 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-07-22 13:13:54,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33245 states. [2022-07-22 13:13:54,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33245 to 33235. [2022-07-22 13:13:54,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33235 states, 33234 states have (on average 1.228771739784558) internal successors, (40837), 33234 states have internal predecessors, (40837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:13:54,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33235 states to 33235 states and 40837 transitions. [2022-07-22 13:13:54,681 INFO L78 Accepts]: Start accepts. Automaton has 33235 states and 40837 transitions. Word has length 616 [2022-07-22 13:13:54,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:13:54,682 INFO L495 AbstractCegarLoop]: Abstraction has 33235 states and 40837 transitions. [2022-07-22 13:13:54,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 2 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:13:54,682 INFO L276 IsEmpty]: Start isEmpty. Operand 33235 states and 40837 transitions. [2022-07-22 13:13:54,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 634 [2022-07-22 13:13:54,686 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:13:54,686 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:13:54,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 13:13:54,687 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:13:54,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:13:54,687 INFO L85 PathProgramCache]: Analyzing trace with hash -491451912, now seen corresponding path program 1 times [2022-07-22 13:13:54,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:13:54,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48437799] [2022-07-22 13:13:54,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:13:54,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:13:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:13:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-22 13:13:54,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:13:54,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48437799] [2022-07-22 13:13:54,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48437799] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:13:54,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:13:54,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 13:13:54,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487813388] [2022-07-22 13:13:54,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:13:54,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:13:54,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:13:54,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:13:54,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 13:13:54,913 INFO L87 Difference]: Start difference. First operand 33235 states and 40837 transitions. Second operand has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 2 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:00,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:14:00,523 INFO L93 Difference]: Finished difference Result 91260 states and 113481 transitions. [2022-07-22 13:14:00,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:14:00,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 2 states have internal predecessors, (544), 0 states have call successors, (0), 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 633 [2022-07-22 13:14:00,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:14:00,606 INFO L225 Difference]: With dead ends: 91260 [2022-07-22 13:14:00,606 INFO L226 Difference]: Without dead ends: 60757 [2022-07-22 13:14:00,635 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 [2022-07-22 13:14:00,637 INFO L413 NwaCegarLoop]: 1747 mSDtfsCounter, 1350 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 4280 mSolverCounterSat, 1430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1350 SdHoareTripleChecker+Valid, 2013 SdHoareTripleChecker+Invalid, 5710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1430 IncrementalHoareTripleChecker+Valid, 4280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-07-22 13:14:00,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1350 Valid, 2013 Invalid, 5710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1430 Valid, 4280 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-07-22 13:14:00,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60757 states. [2022-07-22 13:14:01,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60757 to 55276. [2022-07-22 13:14:01,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55276 states, 55275 states have (on average 1.1672003618272275) internal successors, (64517), 55275 states have internal predecessors, (64517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:01,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55276 states to 55276 states and 64517 transitions. [2022-07-22 13:14:01,243 INFO L78 Accepts]: Start accepts. Automaton has 55276 states and 64517 transitions. Word has length 633 [2022-07-22 13:14:01,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:14:01,243 INFO L495 AbstractCegarLoop]: Abstraction has 55276 states and 64517 transitions. [2022-07-22 13:14:01,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 2 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:01,244 INFO L276 IsEmpty]: Start isEmpty. Operand 55276 states and 64517 transitions. [2022-07-22 13:14:01,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2022-07-22 13:14:01,248 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:14:01,249 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:14:01,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 13:14:01,249 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:14:01,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:14:01,249 INFO L85 PathProgramCache]: Analyzing trace with hash -323741212, now seen corresponding path program 1 times [2022-07-22 13:14:01,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:14:01,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530069649] [2022-07-22 13:14:01,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:14:01,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:14:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:14:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 105 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 13:14:01,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:14:01,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530069649] [2022-07-22 13:14:01,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530069649] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 13:14:01,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164187698] [2022-07-22 13:14:01,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:14:01,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 13:14:01,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 13:14:01,766 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) [2022-07-22 13:14:01,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 13:14:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:14:02,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 13:14:02,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 13:14:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-07-22 13:14:02,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 13:14:02,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164187698] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:14:02,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 13:14:02,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-22 13:14:02,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991798183] [2022-07-22 13:14:02,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:14:02,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:14:02,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:14:02,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:14:02,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-22 13:14:02,144 INFO L87 Difference]: Start difference. First operand 55276 states and 64517 transitions. Second operand has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:06,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:14:06,738 INFO L93 Difference]: Finished difference Result 110553 states and 129119 transitions. [2022-07-22 13:14:06,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:14:06,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 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 749 [2022-07-22 13:14:06,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:14:06,806 INFO L225 Difference]: With dead ends: 110553 [2022-07-22 13:14:06,806 INFO L226 Difference]: Without dead ends: 58009 [2022-07-22 13:14:06,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 755 GetRequests, 748 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-22 13:14:06,842 INFO L413 NwaCegarLoop]: 2903 mSDtfsCounter, 1551 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 3678 mSolverCounterSat, 1466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1551 SdHoareTripleChecker+Valid, 3085 SdHoareTripleChecker+Invalid, 5144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1466 IncrementalHoareTripleChecker+Valid, 3678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-22 13:14:06,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1551 Valid, 3085 Invalid, 5144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1466 Valid, 3678 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-07-22 13:14:06,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58009 states. [2022-07-22 13:14:07,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58009 to 58003. [2022-07-22 13:14:07,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58003 states, 58002 states have (on average 1.116909761732354) internal successors, (64783), 58002 states have internal predecessors, (64783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:07,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58003 states to 58003 states and 64783 transitions. [2022-07-22 13:14:07,352 INFO L78 Accepts]: Start accepts. Automaton has 58003 states and 64783 transitions. Word has length 749 [2022-07-22 13:14:07,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:14:07,352 INFO L495 AbstractCegarLoop]: Abstraction has 58003 states and 64783 transitions. [2022-07-22 13:14:07,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:07,353 INFO L276 IsEmpty]: Start isEmpty. Operand 58003 states and 64783 transitions. [2022-07-22 13:14:07,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2022-07-22 13:14:07,357 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:14:07,358 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:14:07,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 13:14:07,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 13:14:07,571 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:14:07,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:14:07,572 INFO L85 PathProgramCache]: Analyzing trace with hash 568097090, now seen corresponding path program 1 times [2022-07-22 13:14:07,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:14:07,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572478142] [2022-07-22 13:14:07,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:14:07,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:14:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:14:08,199 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 105 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 13:14:08,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:14:08,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572478142] [2022-07-22 13:14:08,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572478142] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 13:14:08,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156367089] [2022-07-22 13:14:08,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:14:08,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 13:14:08,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 13:14:08,202 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) [2022-07-22 13:14:08,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 13:14:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:14:08,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 13:14:08,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 13:14:08,441 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2022-07-22 13:14:08,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 13:14:08,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156367089] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:14:08,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 13:14:08,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-07-22 13:14:08,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493910710] [2022-07-22 13:14:08,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:14:08,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:14:08,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:14:08,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:14:08,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 13:14:08,443 INFO L87 Difference]: Start difference. First operand 58003 states and 64783 transitions. Second operand has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:14,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:14:14,726 INFO L93 Difference]: Finished difference Result 155697 states and 175053 transitions. [2022-07-22 13:14:14,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:14:14,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 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 761 [2022-07-22 13:14:14,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:14:14,854 INFO L225 Difference]: With dead ends: 155697 [2022-07-22 13:14:14,854 INFO L226 Difference]: Without dead ends: 100426 [2022-07-22 13:14:14,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 766 GetRequests, 760 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 13:14:14,896 INFO L413 NwaCegarLoop]: 3189 mSDtfsCounter, 1424 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 5085 mSolverCounterSat, 984 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1424 SdHoareTripleChecker+Valid, 3361 SdHoareTripleChecker+Invalid, 6069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 984 IncrementalHoareTripleChecker+Valid, 5085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-07-22 13:14:14,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1424 Valid, 3361 Invalid, 6069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [984 Valid, 5085 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-07-22 13:14:14,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100426 states. [2022-07-22 13:14:15,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100426 to 97615. [2022-07-22 13:14:15,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97615 states, 97614 states have (on average 1.093757043047104) internal successors, (106766), 97614 states have internal predecessors, (106766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:15,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97615 states to 97615 states and 106766 transitions. [2022-07-22 13:14:15,882 INFO L78 Accepts]: Start accepts. Automaton has 97615 states and 106766 transitions. Word has length 761 [2022-07-22 13:14:15,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:14:15,883 INFO L495 AbstractCegarLoop]: Abstraction has 97615 states and 106766 transitions. [2022-07-22 13:14:15,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:15,883 INFO L276 IsEmpty]: Start isEmpty. Operand 97615 states and 106766 transitions. [2022-07-22 13:14:15,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2022-07-22 13:14:15,889 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:14:15,889 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:14:15,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 13:14:16,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 13:14:16,107 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:14:16,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:14:16,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1474438302, now seen corresponding path program 1 times [2022-07-22 13:14:16,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:14:16,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649085111] [2022-07-22 13:14:16,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:14:16,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:14:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:14:16,630 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 327 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-07-22 13:14:16,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:14:16,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649085111] [2022-07-22 13:14:16,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649085111] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:14:16,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 13:14:16,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 13:14:16,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118787504] [2022-07-22 13:14:16,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:14:16,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 13:14:16,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:14:16,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 13:14:16,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 13:14:16,633 INFO L87 Difference]: Start difference. First operand 97615 states and 106766 transitions. Second operand has 4 states, 4 states have (on average 157.75) internal successors, (631), 4 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:26,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:14:26,829 INFO L93 Difference]: Finished difference Result 299170 states and 331090 transitions. [2022-07-22 13:14:26,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 13:14:26,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 157.75) internal successors, (631), 4 states have internal predecessors, (631), 0 states have call successors, (0), 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 839 [2022-07-22 13:14:26,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:14:27,081 INFO L225 Difference]: With dead ends: 299170 [2022-07-22 13:14:27,082 INFO L226 Difference]: Without dead ends: 204287 [2022-07-22 13:14:27,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 13:14:27,126 INFO L413 NwaCegarLoop]: 976 mSDtfsCounter, 3309 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 8857 mSolverCounterSat, 2915 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3309 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 11772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2915 IncrementalHoareTripleChecker+Valid, 8857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-07-22 13:14:27,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3309 Valid, 1239 Invalid, 11772 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2915 Valid, 8857 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2022-07-22 13:14:27,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204287 states. [2022-07-22 13:14:28,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204287 to 194610. [2022-07-22 13:14:28,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194610 states, 194609 states have (on average 1.0927038317857858) internal successors, (212650), 194609 states have internal predecessors, (212650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:29,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194610 states to 194610 states and 212650 transitions. [2022-07-22 13:14:29,405 INFO L78 Accepts]: Start accepts. Automaton has 194610 states and 212650 transitions. Word has length 839 [2022-07-22 13:14:29,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:14:29,406 INFO L495 AbstractCegarLoop]: Abstraction has 194610 states and 212650 transitions. [2022-07-22 13:14:29,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.75) internal successors, (631), 4 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:29,406 INFO L276 IsEmpty]: Start isEmpty. Operand 194610 states and 212650 transitions. [2022-07-22 13:14:29,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2022-07-22 13:14:29,413 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:14:29,413 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:14:29,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 13:14:29,414 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:14:29,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:14:29,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1886035100, now seen corresponding path program 1 times [2022-07-22 13:14:29,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:14:29,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610235602] [2022-07-22 13:14:29,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:14:29,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:14:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:14:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 159 proven. 418 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-07-22 13:14:29,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:14:29,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610235602] [2022-07-22 13:14:29,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610235602] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 13:14:29,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374523681] [2022-07-22 13:14:29,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:14:29,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 13:14:29,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 13:14:29,897 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 13:14:29,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 13:14:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:14:30,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 13:14:30,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 13:14:30,241 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2022-07-22 13:14:30,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 13:14:30,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374523681] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:14:30,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 13:14:30,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-22 13:14:30,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151804974] [2022-07-22 13:14:30,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:14:30,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:14:30,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:14:30,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:14:30,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 13:14:30,244 INFO L87 Difference]: Start difference. First operand 194610 states and 212650 transitions. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:35,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:14:35,541 INFO L93 Difference]: Finished difference Result 427449 states and 469734 transitions. [2022-07-22 13:14:35,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:14:35,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 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 915 [2022-07-22 13:14:35,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:14:35,990 INFO L225 Difference]: With dead ends: 427449 [2022-07-22 13:14:35,990 INFO L226 Difference]: Without dead ends: 232841 [2022-07-22 13:14:36,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 919 GetRequests, 915 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 13:14:36,036 INFO L413 NwaCegarLoop]: 2685 mSDtfsCounter, 1622 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 3724 mSolverCounterSat, 1583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1622 SdHoareTripleChecker+Valid, 2826 SdHoareTripleChecker+Invalid, 5307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1583 IncrementalHoareTripleChecker+Valid, 3724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-22 13:14:36,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1622 Valid, 2826 Invalid, 5307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1583 Valid, 3724 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-07-22 13:14:36,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232841 states. [2022-07-22 13:14:38,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232841 to 224630. [2022-07-22 13:14:38,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224630 states, 224629 states have (on average 1.085322910220853) internal successors, (243795), 224629 states have internal predecessors, (243795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:38,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224630 states to 224630 states and 243795 transitions. [2022-07-22 13:14:38,606 INFO L78 Accepts]: Start accepts. Automaton has 224630 states and 243795 transitions. Word has length 915 [2022-07-22 13:14:38,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:14:38,606 INFO L495 AbstractCegarLoop]: Abstraction has 224630 states and 243795 transitions. [2022-07-22 13:14:38,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:38,607 INFO L276 IsEmpty]: Start isEmpty. Operand 224630 states and 243795 transitions. [2022-07-22 13:14:38,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2022-07-22 13:14:38,613 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:14:38,614 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:14:38,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 13:14:38,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 13:14:38,831 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:14:38,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:14:38,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1926709850, now seen corresponding path program 1 times [2022-07-22 13:14:38,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:14:38,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041912334] [2022-07-22 13:14:38,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:14:38,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:14:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:14:39,270 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 341 proven. 366 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-22 13:14:39,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:14:39,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041912334] [2022-07-22 13:14:39,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041912334] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 13:14:39,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291123856] [2022-07-22 13:14:39,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:14:39,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 13:14:39,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 13:14:39,284 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 13:14:39,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 13:14:39,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:14:39,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 13:14:39,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 13:14:39,579 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 405 proven. 0 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-22 13:14:39,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 13:14:39,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291123856] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:14:39,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 13:14:39,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-22 13:14:39,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494691263] [2022-07-22 13:14:39,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:14:39,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:14:39,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:14:39,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:14:39,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-22 13:14:39,582 INFO L87 Difference]: Start difference. First operand 224630 states and 243795 transitions. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:46,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:14:46,258 INFO L93 Difference]: Finished difference Result 532645 states and 582886 transitions. [2022-07-22 13:14:46,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:14:46,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 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 915 [2022-07-22 13:14:46,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:14:46,694 INFO L225 Difference]: With dead ends: 532645 [2022-07-22 13:14:46,694 INFO L226 Difference]: Without dead ends: 310747 [2022-07-22 13:14:46,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 919 GetRequests, 916 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-22 13:14:46,794 INFO L413 NwaCegarLoop]: 1300 mSDtfsCounter, 1524 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 4188 mSolverCounterSat, 1765 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1524 SdHoareTripleChecker+Valid, 1425 SdHoareTripleChecker+Invalid, 5953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1765 IncrementalHoareTripleChecker+Valid, 4188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-07-22 13:14:46,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1524 Valid, 1425 Invalid, 5953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1765 Valid, 4188 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-07-22 13:14:47,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310747 states. [2022-07-22 13:14:49,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310747 to 306530. [2022-07-22 13:14:49,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306530 states, 306529 states have (on average 1.0871402053313064) internal successors, (333240), 306529 states have internal predecessors, (333240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:50,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306530 states to 306530 states and 333240 transitions. [2022-07-22 13:14:50,279 INFO L78 Accepts]: Start accepts. Automaton has 306530 states and 333240 transitions. Word has length 915 [2022-07-22 13:14:50,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:14:50,279 INFO L495 AbstractCegarLoop]: Abstraction has 306530 states and 333240 transitions. [2022-07-22 13:14:50,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:50,279 INFO L276 IsEmpty]: Start isEmpty. Operand 306530 states and 333240 transitions. [2022-07-22 13:14:50,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1087 [2022-07-22 13:14:50,602 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:14:50,602 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:14:50,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 13:14:50,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 13:14:50,803 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:14:50,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:14:50,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1305199607, now seen corresponding path program 1 times [2022-07-22 13:14:50,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:14:50,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899908403] [2022-07-22 13:14:50,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:14:50,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:14:50,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:14:51,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1434 backedges. 963 proven. 66 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2022-07-22 13:14:51,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:14:51,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899908403] [2022-07-22 13:14:51,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899908403] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 13:14:51,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858256981] [2022-07-22 13:14:51,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:14:51,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 13:14:51,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 13:14:51,103 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 13:14:51,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 13:14:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:14:51,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 13:14:51,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 13:14:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1434 backedges. 705 proven. 0 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2022-07-22 13:14:51,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 13:14:51,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858256981] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:14:51,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 13:14:51,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-22 13:14:51,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035901481] [2022-07-22 13:14:51,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:14:51,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:14:51,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:14:51,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:14:51,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 13:14:51,455 INFO L87 Difference]: Start difference. First operand 306530 states and 333240 transitions. Second operand has 3 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:14:57,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:14:57,562 INFO L93 Difference]: Finished difference Result 604862 states and 657985 transitions. [2022-07-22 13:14:57,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:14:57,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 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 1086 [2022-07-22 13:14:57,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:14:57,978 INFO L225 Difference]: With dead ends: 604862 [2022-07-22 13:14:57,978 INFO L226 Difference]: Without dead ends: 301064 [2022-07-22 13:14:58,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1089 GetRequests, 1086 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 13:14:58,094 INFO L413 NwaCegarLoop]: 2859 mSDtfsCounter, 1327 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 4408 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1327 SdHoareTripleChecker+Valid, 3051 SdHoareTripleChecker+Invalid, 4804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 4408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-22 13:14:58,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1327 Valid, 3051 Invalid, 4804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 4408 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-07-22 13:14:58,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301064 states. [2022-07-22 13:15:01,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301064 to 280581. [2022-07-22 13:15:01,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280581 states, 280580 states have (on average 1.0770653646018962) internal successors, (302203), 280580 states have internal predecessors, (302203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:15:01,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280581 states to 280581 states and 302203 transitions. [2022-07-22 13:15:01,844 INFO L78 Accepts]: Start accepts. Automaton has 280581 states and 302203 transitions. Word has length 1086 [2022-07-22 13:15:01,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 13:15:01,845 INFO L495 AbstractCegarLoop]: Abstraction has 280581 states and 302203 transitions. [2022-07-22 13:15:01,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:15:01,845 INFO L276 IsEmpty]: Start isEmpty. Operand 280581 states and 302203 transitions. [2022-07-22 13:15:01,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1187 [2022-07-22 13:15:01,862 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 13:15:01,862 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 13:15:01,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 13:15:02,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 13:15:02,081 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 13:15:02,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 13:15:02,081 INFO L85 PathProgramCache]: Analyzing trace with hash -997458024, now seen corresponding path program 1 times [2022-07-22 13:15:02,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 13:15:02,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635138008] [2022-07-22 13:15:02,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:15:02,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 13:15:02,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:15:02,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 1356 proven. 66 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2022-07-22 13:15:02,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 13:15:02,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635138008] [2022-07-22 13:15:02,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635138008] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 13:15:02,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092981438] [2022-07-22 13:15:02,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 13:15:02,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 13:15:02,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 13:15:02,415 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 13:15:02,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 13:15:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 13:15:02,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 1409 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 13:15:02,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 13:15:02,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 858 proven. 0 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2022-07-22 13:15:02,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 13:15:02,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092981438] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 13:15:02,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 13:15:02,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-22 13:15:02,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037607425] [2022-07-22 13:15:02,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 13:15:02,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 13:15:02,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 13:15:02,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 13:15:02,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 13:15:02,798 INFO L87 Difference]: Start difference. First operand 280581 states and 302203 transitions. Second operand has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 13:15:08,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 13:15:08,670 INFO L93 Difference]: Finished difference Result 563885 states and 607170 transitions. [2022-07-22 13:15:08,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 13:15:08,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 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 1186 [2022-07-22 13:15:08,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 13:15:09,072 INFO L225 Difference]: With dead ends: 563885 [2022-07-22 13:15:09,072 INFO L226 Difference]: Without dead ends: 283305 [2022-07-22 13:15:09,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1189 GetRequests, 1186 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 13:15:09,206 INFO L413 NwaCegarLoop]: 2377 mSDtfsCounter, 1676 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 3753 mSolverCounterSat, 1295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1676 SdHoareTripleChecker+Valid, 2460 SdHoareTripleChecker+Invalid, 5048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1295 IncrementalHoareTripleChecker+Valid, 3753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-22 13:15:09,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1676 Valid, 2460 Invalid, 5048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1295 Valid, 3753 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-07-22 13:15:09,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283305 states.