./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label15.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label15.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 9fbc20983083f465b3eede57a226cc56a0e48515578e64c31c2db7f869f449ac --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 04:37:16,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 04:37:16,284 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 04:37:16,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 04:37:16,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 04:37:16,344 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 04:37:16,346 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 04:37:16,348 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 04:37:16,349 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 04:37:16,354 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 04:37:16,355 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 04:37:16,355 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 04:37:16,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 04:37:16,357 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 04:37:16,359 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 04:37:16,359 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 04:37:16,360 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 04:37:16,362 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 04:37:16,363 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 04:37:16,366 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 04:37:16,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 04:37:16,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 04:37:16,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 04:37:16,371 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 04:37:16,372 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 04:37:16,373 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 04:37:16,373 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 04:37:16,374 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 04:37:16,375 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 04:37:16,375 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 04:37:16,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 04:37:16,376 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 04:37:16,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 04:37:16,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 04:37:16,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 04:37:16,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 04:37:16,380 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 04:37:16,380 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 04:37:16,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 04:37:16,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 04:37:16,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 04:37:16,382 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 04:37:16,408 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 04:37:16,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 04:37:16,409 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 04:37:16,409 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 04:37:16,410 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 04:37:16,410 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 04:37:16,410 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 04:37:16,410 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 04:37:16,411 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 04:37:16,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 04:37:16,411 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 04:37:16,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 04:37:16,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 04:37:16,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 04:37:16,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 04:37:16,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 04:37:16,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 04:37:16,412 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 04:37:16,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 04:37:16,413 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 04:37:16,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 04:37:16,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 04:37:16,413 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 04:37:16,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 04:37:16,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:37:16,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 04:37:16,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 04:37:16,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 04:37:16,415 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 04:37:16,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 04:37:16,416 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 04:37:16,416 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 04:37:16,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 04:37:16,416 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 04:37:16,416 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9fbc20983083f465b3eede57a226cc56a0e48515578e64c31c2db7f869f449ac [2021-12-17 04:37:16,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 04:37:16,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 04:37:16,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 04:37:16,631 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 04:37:16,631 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 04:37:16,632 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label15.c [2021-12-17 04:37:16,706 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c3b6d7e9/2e0f6f305ef149749fb844fb166fc7af/FLAG37c035f3d [2021-12-17 04:37:17,290 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 04:37:17,290 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label15.c [2021-12-17 04:37:17,313 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c3b6d7e9/2e0f6f305ef149749fb844fb166fc7af/FLAG37c035f3d [2021-12-17 04:37:17,724 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c3b6d7e9/2e0f6f305ef149749fb844fb166fc7af [2021-12-17 04:37:17,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 04:37:17,726 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 04:37:17,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 04:37:17,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 04:37:17,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 04:37:17,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:37:17" (1/1) ... [2021-12-17 04:37:17,732 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1415b965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:17, skipping insertion in model container [2021-12-17 04:37:17,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:37:17" (1/1) ... [2021-12-17 04:37:17,736 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 04:37:17,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 04:37:18,042 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label15.c[5297,5310] [2021-12-17 04:37:18,660 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:37:18,665 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 04:37:18,689 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label15.c[5297,5310] [2021-12-17 04:37:19,019 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:37:19,037 INFO L208 MainTranslator]: Completed translation [2021-12-17 04:37:19,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:19 WrapperNode [2021-12-17 04:37:19,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 04:37:19,038 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 04:37:19,038 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 04:37:19,039 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 04:37:19,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:19" (1/1) ... [2021-12-17 04:37:19,100 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:19" (1/1) ... [2021-12-17 04:37:19,566 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-17 04:37:19,579 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 04:37:19,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 04:37:19,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 04:37:19,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 04:37:19,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:19" (1/1) ... [2021-12-17 04:37:19,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:19" (1/1) ... [2021-12-17 04:37:19,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:19" (1/1) ... [2021-12-17 04:37:19,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:19" (1/1) ... [2021-12-17 04:37:19,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:19" (1/1) ... [2021-12-17 04:37:19,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:19" (1/1) ... [2021-12-17 04:37:20,022 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:19" (1/1) ... [2021-12-17 04:37:20,078 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 04:37:20,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 04:37:20,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 04:37:20,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 04:37:20,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:19" (1/1) ... [2021-12-17 04:37:20,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:37:20,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:37:20,101 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) [2021-12-17 04:37:20,147 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 [2021-12-17 04:37:20,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 04:37:20,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 04:37:20,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 04:37:20,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 04:37:20,231 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 04:37:20,232 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 04:37:23,664 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 04:37:23,675 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 04:37:23,675 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 04:37:23,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:37:23 BoogieIcfgContainer [2021-12-17 04:37:23,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 04:37:23,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 04:37:23,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 04:37:23,681 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 04:37:23,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 04:37:17" (1/3) ... [2021-12-17 04:37:23,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@628d70cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:37:23, skipping insertion in model container [2021-12-17 04:37:23,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:37:19" (2/3) ... [2021-12-17 04:37:23,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@628d70cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:37:23, skipping insertion in model container [2021-12-17 04:37:23,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:37:23" (3/3) ... [2021-12-17 04:37:23,682 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label15.c [2021-12-17 04:37:23,685 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 04:37:23,686 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 04:37:23,715 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 04:37:23,719 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 04:37:23,719 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 04:37:23,738 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:23,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-17 04:37:23,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:23,743 INFO L514 BasicCegarLoop]: 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] [2021-12-17 04:37:23,743 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:23,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:23,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1318097310, now seen corresponding path program 1 times [2021-12-17 04:37:23,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:23,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133821251] [2021-12-17 04:37:23,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:23,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:23,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:37:24,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:24,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133821251] [2021-12-17 04:37:24,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133821251] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:24,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:37:24,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:37:24,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343196030] [2021-12-17 04:37:24,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:24,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:37:24,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:24,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:37:24,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:37:24,081 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:28,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:28,955 INFO L93 Difference]: Finished difference Result 3829 states and 7206 transitions. [2021-12-17 04:37:28,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:37:28,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-12-17 04:37:28,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:28,993 INFO L225 Difference]: With dead ends: 3829 [2021-12-17 04:37:28,994 INFO L226 Difference]: Without dead ends: 2664 [2021-12-17 04:37:29,022 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:37:29,026 INFO L933 BasicCegarLoop]: 761 mSDtfsCounter, 2718 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 4246 mSolverCounterSat, 1610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2718 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 5856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1610 IncrementalHoareTripleChecker+Valid, 4246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:29,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2718 Valid, 1067 Invalid, 5856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1610 Valid, 4246 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-12-17 04:37:29,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-12-17 04:37:29,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2663. [2021-12-17 04:37:29,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 1.460931630353118) internal successors, (3889), 2662 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:29,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 3889 transitions. [2021-12-17 04:37:29,134 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 3889 transitions. Word has length 36 [2021-12-17 04:37:29,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:37:29,134 INFO L470 AbstractCegarLoop]: Abstraction has 2663 states and 3889 transitions. [2021-12-17 04:37:29,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:29,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 3889 transitions. [2021-12-17 04:37:29,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-17 04:37:29,142 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:29,142 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:37:29,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 04:37:29,143 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:29,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:29,145 INFO L85 PathProgramCache]: Analyzing trace with hash 475465869, now seen corresponding path program 1 times [2021-12-17 04:37:29,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:29,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114567439] [2021-12-17 04:37:29,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:29,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:29,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:29,545 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:37:29,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:29,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114567439] [2021-12-17 04:37:29,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114567439] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:37:29,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483018246] [2021-12-17 04:37:29,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:29,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:37:29,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:37:29,548 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) [2021-12-17 04:37:29,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 04:37:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:29,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:37:29,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:37:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-17 04:37:29,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:37:29,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483018246] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:29,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:37:29,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-17 04:37:29,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643180461] [2021-12-17 04:37:29,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:29,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:37:29,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:29,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:37:29,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:37:29,915 INFO L87 Difference]: Start difference. First operand 2663 states and 3889 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:32,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:32,981 INFO L93 Difference]: Finished difference Result 6142 states and 9712 transitions. [2021-12-17 04:37:32,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:37:32,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-12-17 04:37:32,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:32,994 INFO L225 Difference]: With dead ends: 6142 [2021-12-17 04:37:32,995 INFO L226 Difference]: Without dead ends: 4268 [2021-12-17 04:37:32,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:37:32,999 INFO L933 BasicCegarLoop]: 1039 mSDtfsCounter, 743 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 2508 mSolverCounterSat, 778 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 3286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 778 IncrementalHoareTripleChecker+Valid, 2508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:33,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 1188 Invalid, 3286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [778 Valid, 2508 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-17 04:37:33,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4268 states. [2021-12-17 04:37:33,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4268 to 4254. [2021-12-17 04:37:33,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4254 states, 4253 states have (on average 1.3515165765342112) internal successors, (5748), 4253 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:33,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4254 states to 4254 states and 5748 transitions. [2021-12-17 04:37:33,064 INFO L78 Accepts]: Start accepts. Automaton has 4254 states and 5748 transitions. Word has length 161 [2021-12-17 04:37:33,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:37:33,067 INFO L470 AbstractCegarLoop]: Abstraction has 4254 states and 5748 transitions. [2021-12-17 04:37:33,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:33,068 INFO L276 IsEmpty]: Start isEmpty. Operand 4254 states and 5748 transitions. [2021-12-17 04:37:33,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-12-17 04:37:33,078 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:33,079 INFO L514 BasicCegarLoop]: 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:37:33,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 04:37:33,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:37:33,295 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:33,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:33,296 INFO L85 PathProgramCache]: Analyzing trace with hash 70369978, now seen corresponding path program 1 times [2021-12-17 04:37:33,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:33,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711473891] [2021-12-17 04:37:33,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:33,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-17 04:37:33,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:33,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711473891] [2021-12-17 04:37:33,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711473891] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:33,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:37:33,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:37:33,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218528725] [2021-12-17 04:37:33,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:33,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:37:33,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:33,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:37:33,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:33,415 INFO L87 Difference]: Start difference. First operand 4254 states and 5748 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:36,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:36,532 INFO L93 Difference]: Finished difference Result 10897 states and 15274 transitions. [2021-12-17 04:37:36,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:37:36,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 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 203 [2021-12-17 04:37:36,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:36,586 INFO L225 Difference]: With dead ends: 10897 [2021-12-17 04:37:36,586 INFO L226 Difference]: Without dead ends: 7432 [2021-12-17 04:37:36,591 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:37:36,593 INFO L933 BasicCegarLoop]: 824 mSDtfsCounter, 905 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 2567 mSolverCounterSat, 755 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 3322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 755 IncrementalHoareTripleChecker+Valid, 2567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:36,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [905 Valid, 955 Invalid, 3322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [755 Valid, 2567 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-17 04:37:36,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7432 states. [2021-12-17 04:37:36,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7432 to 7426. [2021-12-17 04:37:36,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7426 states, 7425 states have (on average 1.288888888888889) internal successors, (9570), 7425 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:36,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7426 states to 7426 states and 9570 transitions. [2021-12-17 04:37:36,705 INFO L78 Accepts]: Start accepts. Automaton has 7426 states and 9570 transitions. Word has length 203 [2021-12-17 04:37:36,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:37:36,707 INFO L470 AbstractCegarLoop]: Abstraction has 7426 states and 9570 transitions. [2021-12-17 04:37:36,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:36,707 INFO L276 IsEmpty]: Start isEmpty. Operand 7426 states and 9570 transitions. [2021-12-17 04:37:36,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-12-17 04:37:36,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:36,710 INFO L514 BasicCegarLoop]: 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:37:36,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 04:37:36,710 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:36,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:36,710 INFO L85 PathProgramCache]: Analyzing trace with hash -291716105, now seen corresponding path program 1 times [2021-12-17 04:37:36,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:36,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523777672] [2021-12-17 04:37:36,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:36,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:36,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:36,797 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-17 04:37:36,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:36,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523777672] [2021-12-17 04:37:36,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523777672] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:36,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:37:36,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:37:36,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875625563] [2021-12-17 04:37:36,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:36,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:37:36,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:36,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:37:36,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:36,802 INFO L87 Difference]: Start difference. First operand 7426 states and 9570 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:39,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:39,514 INFO L93 Difference]: Finished difference Result 20364 states and 26675 transitions. [2021-12-17 04:37:39,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:37:39,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 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 217 [2021-12-17 04:37:39,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:39,552 INFO L225 Difference]: With dead ends: 20364 [2021-12-17 04:37:39,553 INFO L226 Difference]: Without dead ends: 13727 [2021-12-17 04:37:39,564 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:37:39,570 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 886 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 869 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 3177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 869 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:39,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 987 Invalid, 3177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [869 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 04:37:39,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13727 states. [2021-12-17 04:37:39,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13727 to 12937. [2021-12-17 04:37:39,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12937 states, 12936 states have (on average 1.215213358070501) internal successors, (15720), 12936 states have internal predecessors, (15720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:39,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12937 states to 12937 states and 15720 transitions. [2021-12-17 04:37:39,802 INFO L78 Accepts]: Start accepts. Automaton has 12937 states and 15720 transitions. Word has length 217 [2021-12-17 04:37:39,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:37:39,802 INFO L470 AbstractCegarLoop]: Abstraction has 12937 states and 15720 transitions. [2021-12-17 04:37:39,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:39,803 INFO L276 IsEmpty]: Start isEmpty. Operand 12937 states and 15720 transitions. [2021-12-17 04:37:39,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-12-17 04:37:39,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:39,808 INFO L514 BasicCegarLoop]: 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:37:39,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 04:37:39,808 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:39,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:39,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1924598934, now seen corresponding path program 1 times [2021-12-17 04:37:39,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:39,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753050110] [2021-12-17 04:37:39,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:39,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:39,916 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:37:39,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:39,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753050110] [2021-12-17 04:37:39,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753050110] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:39,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:37:39,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:37:39,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473790797] [2021-12-17 04:37:39,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:39,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:37:39,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:39,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:37:39,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:39,918 INFO L87 Difference]: Start difference. First operand 12937 states and 15720 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:42,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:42,847 INFO L93 Difference]: Finished difference Result 31392 states and 39119 transitions. [2021-12-17 04:37:42,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:37:42,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 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 235 [2021-12-17 04:37:42,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:42,881 INFO L225 Difference]: With dead ends: 31392 [2021-12-17 04:37:42,882 INFO L226 Difference]: Without dead ends: 19244 [2021-12-17 04:37:42,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:42,896 INFO L933 BasicCegarLoop]: 809 mSDtfsCounter, 858 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 3295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:42,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 926 Invalid, 3295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [914 Valid, 2381 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-17 04:37:42,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19244 states. [2021-12-17 04:37:43,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19244 to 18447. [2021-12-17 04:37:43,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18447 states, 18446 states have (on average 1.2024287108316165) internal successors, (22180), 18446 states have internal predecessors, (22180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:43,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18447 states to 18447 states and 22180 transitions. [2021-12-17 04:37:43,102 INFO L78 Accepts]: Start accepts. Automaton has 18447 states and 22180 transitions. Word has length 235 [2021-12-17 04:37:43,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:37:43,102 INFO L470 AbstractCegarLoop]: Abstraction has 18447 states and 22180 transitions. [2021-12-17 04:37:43,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:43,102 INFO L276 IsEmpty]: Start isEmpty. Operand 18447 states and 22180 transitions. [2021-12-17 04:37:43,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-12-17 04:37:43,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:43,107 INFO L514 BasicCegarLoop]: 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:37:43,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 04:37:43,107 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:43,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:43,108 INFO L85 PathProgramCache]: Analyzing trace with hash -355097952, now seen corresponding path program 1 times [2021-12-17 04:37:43,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:43,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785029677] [2021-12-17 04:37:43,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:43,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:43,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-17 04:37:43,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:43,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785029677] [2021-12-17 04:37:43,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785029677] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:43,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:37:43,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:37:43,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17629403] [2021-12-17 04:37:43,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:43,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:37:43,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:43,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:37:43,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:43,240 INFO L87 Difference]: Start difference. First operand 18447 states and 22180 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:47,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:47,115 INFO L93 Difference]: Finished difference Result 52772 states and 63784 transitions. [2021-12-17 04:37:47,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:37:47,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 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 324 [2021-12-17 04:37:47,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:47,162 INFO L225 Difference]: With dead ends: 52772 [2021-12-17 04:37:47,162 INFO L226 Difference]: Without dead ends: 35114 [2021-12-17 04:37:47,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:47,177 INFO L933 BasicCegarLoop]: 1700 mSDtfsCounter, 937 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 3128 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 1819 SdHoareTripleChecker+Invalid, 3731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 3128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:47,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [937 Valid, 1819 Invalid, 3731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 3128 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-17 04:37:47,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35114 states. [2021-12-17 04:37:47,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35114 to 34274. [2021-12-17 04:37:47,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34274 states, 34273 states have (on average 1.1858897674554314) internal successors, (40644), 34273 states have internal predecessors, (40644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:47,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34274 states to 34274 states and 40644 transitions. [2021-12-17 04:37:47,495 INFO L78 Accepts]: Start accepts. Automaton has 34274 states and 40644 transitions. Word has length 324 [2021-12-17 04:37:47,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:37:47,495 INFO L470 AbstractCegarLoop]: Abstraction has 34274 states and 40644 transitions. [2021-12-17 04:37:47,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:47,496 INFO L276 IsEmpty]: Start isEmpty. Operand 34274 states and 40644 transitions. [2021-12-17 04:37:47,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-12-17 04:37:47,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:47,500 INFO L514 BasicCegarLoop]: 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:37:47,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 04:37:47,500 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:47,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:47,500 INFO L85 PathProgramCache]: Analyzing trace with hash 405212956, now seen corresponding path program 1 times [2021-12-17 04:37:47,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:47,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552915951] [2021-12-17 04:37:47,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:47,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:47,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:47,598 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-17 04:37:47,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:47,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552915951] [2021-12-17 04:37:47,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552915951] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:47,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:37:47,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:37:47,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304388904] [2021-12-17 04:37:47,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:47,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:37:47,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:47,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:37:47,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:37:47,601 INFO L87 Difference]: Start difference. First operand 34274 states and 40644 transitions. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:53,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:53,716 INFO L93 Difference]: Finished difference Result 108142 states and 129354 transitions. [2021-12-17 04:37:53,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:37:53,717 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 324 [2021-12-17 04:37:53,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:53,806 INFO L225 Difference]: With dead ends: 108142 [2021-12-17 04:37:53,807 INFO L226 Difference]: Without dead ends: 74657 [2021-12-17 04:37:53,847 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:37:53,848 INFO L933 BasicCegarLoop]: 595 mSDtfsCounter, 1726 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 6794 mSolverCounterSat, 1086 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1726 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 7880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1086 IncrementalHoareTripleChecker+Valid, 6794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:53,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1726 Valid, 844 Invalid, 7880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1086 Valid, 6794 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-12-17 04:37:53,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74657 states. [2021-12-17 04:37:54,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74657 to 73711. [2021-12-17 04:37:54,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73711 states, 73710 states have (on average 1.171916971916972) internal successors, (86382), 73710 states have internal predecessors, (86382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:54,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73711 states to 73711 states and 86382 transitions. [2021-12-17 04:37:54,804 INFO L78 Accepts]: Start accepts. Automaton has 73711 states and 86382 transitions. Word has length 324 [2021-12-17 04:37:54,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:37:54,805 INFO L470 AbstractCegarLoop]: Abstraction has 73711 states and 86382 transitions. [2021-12-17 04:37:54,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:54,805 INFO L276 IsEmpty]: Start isEmpty. Operand 73711 states and 86382 transitions. [2021-12-17 04:37:54,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-12-17 04:37:54,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:54,811 INFO L514 BasicCegarLoop]: 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:37:54,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 04:37:54,812 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:54,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:54,812 INFO L85 PathProgramCache]: Analyzing trace with hash -763805449, now seen corresponding path program 1 times [2021-12-17 04:37:54,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:54,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174390095] [2021-12-17 04:37:54,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:54,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 369 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-17 04:37:54,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:54,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174390095] [2021-12-17 04:37:54,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174390095] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:54,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:37:54,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:37:54,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704025939] [2021-12-17 04:37:54,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:54,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:37:54,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:54,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:37:54,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:54,896 INFO L87 Difference]: Start difference. First operand 73711 states and 86382 transitions. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:58,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:58,219 INFO L93 Difference]: Finished difference Result 146671 states and 172035 transitions. [2021-12-17 04:37:58,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:37:58,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 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 362 [2021-12-17 04:37:58,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:58,345 INFO L225 Difference]: With dead ends: 146671 [2021-12-17 04:37:58,346 INFO L226 Difference]: Without dead ends: 73749 [2021-12-17 04:37:58,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:58,398 INFO L933 BasicCegarLoop]: 1848 mSDtfsCounter, 753 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 1990 SdHoareTripleChecker+Invalid, 2902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:58,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 1990 Invalid, 2902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 04:37:58,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73749 states. [2021-12-17 04:37:59,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73749 to 73712. [2021-12-17 04:37:59,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73712 states, 73711 states have (on average 1.1574663211732306) internal successors, (85318), 73711 states have internal predecessors, (85318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:59,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73712 states to 73712 states and 85318 transitions. [2021-12-17 04:37:59,407 INFO L78 Accepts]: Start accepts. Automaton has 73712 states and 85318 transitions. Word has length 362 [2021-12-17 04:37:59,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:37:59,408 INFO L470 AbstractCegarLoop]: Abstraction has 73712 states and 85318 transitions. [2021-12-17 04:37:59,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:59,408 INFO L276 IsEmpty]: Start isEmpty. Operand 73712 states and 85318 transitions. [2021-12-17 04:37:59,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2021-12-17 04:37:59,414 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:59,414 INFO L514 BasicCegarLoop]: 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:37:59,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 04:37:59,415 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:59,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:59,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1322459551, now seen corresponding path program 1 times [2021-12-17 04:37:59,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:59,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085723937] [2021-12-17 04:37:59,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:59,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:59,751 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 293 proven. 110 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-17 04:37:59,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:59,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085723937] [2021-12-17 04:37:59,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085723937] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:37:59,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734045896] [2021-12-17 04:37:59,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:59,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:37:59,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:37:59,755 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) [2021-12-17 04:37:59,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 04:37:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:59,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:37:59,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:38:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 290 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-17 04:38:00,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:38:00,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734045896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:00,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:38:00,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-17 04:38:00,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649692321] [2021-12-17 04:38:00,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:00,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:38:00,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:00,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:38:00,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:38:00,516 INFO L87 Difference]: Start difference. First operand 73712 states and 85318 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:03,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:03,266 INFO L93 Difference]: Finished difference Result 146632 states and 169840 transitions. [2021-12-17 04:38:03,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:38:03,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 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 391 [2021-12-17 04:38:03,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:03,358 INFO L225 Difference]: With dead ends: 146632 [2021-12-17 04:38:03,358 INFO L226 Difference]: Without dead ends: 73709 [2021-12-17 04:38:03,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:38:03,399 INFO L933 BasicCegarLoop]: 1363 mSDtfsCounter, 1094 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2467 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1094 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 2918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 2467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:03,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1094 Valid, 1445 Invalid, 2918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 2467 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 04:38:03,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73709 states. [2021-12-17 04:38:04,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73709 to 73707. [2021-12-17 04:38:04,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73707 states, 73706 states have (on average 1.1202208775404987) internal successors, (82567), 73706 states have internal predecessors, (82567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:04,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73707 states to 73707 states and 82567 transitions. [2021-12-17 04:38:04,225 INFO L78 Accepts]: Start accepts. Automaton has 73707 states and 82567 transitions. Word has length 391 [2021-12-17 04:38:04,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:04,227 INFO L470 AbstractCegarLoop]: Abstraction has 73707 states and 82567 transitions. [2021-12-17 04:38:04,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:04,227 INFO L276 IsEmpty]: Start isEmpty. Operand 73707 states and 82567 transitions. [2021-12-17 04:38:04,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2021-12-17 04:38:04,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:04,234 INFO L514 BasicCegarLoop]: 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, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:38:04,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 04:38:04,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-17 04:38:04,451 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:04,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:04,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1571282055, now seen corresponding path program 1 times [2021-12-17 04:38:04,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:04,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200931786] [2021-12-17 04:38:04,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:04,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:04,548 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 464 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-17 04:38:04,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:04,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200931786] [2021-12-17 04:38:04,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200931786] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:04,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:38:04,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:38:04,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421554444] [2021-12-17 04:38:04,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:04,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:38:04,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:04,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:38:04,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:04,550 INFO L87 Difference]: Start difference. First operand 73707 states and 82567 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:07,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:07,632 INFO L93 Difference]: Finished difference Result 168680 states and 191537 transitions. [2021-12-17 04:38:07,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:38:07,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 392 [2021-12-17 04:38:07,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:07,750 INFO L225 Difference]: With dead ends: 168680 [2021-12-17 04:38:07,750 INFO L226 Difference]: Without dead ends: 95762 [2021-12-17 04:38:07,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:07,789 INFO L933 BasicCegarLoop]: 829 mSDtfsCounter, 899 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2413 mSolverCounterSat, 946 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 3359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 946 IncrementalHoareTripleChecker+Valid, 2413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:07,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [899 Valid, 914 Invalid, 3359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [946 Valid, 2413 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 04:38:07,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95762 states. [2021-12-17 04:38:08,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95762 to 94956. [2021-12-17 04:38:08,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94956 states, 94955 states have (on average 1.1291875098730977) internal successors, (107222), 94955 states have internal predecessors, (107222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:08,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94956 states to 94956 states and 107222 transitions. [2021-12-17 04:38:08,770 INFO L78 Accepts]: Start accepts. Automaton has 94956 states and 107222 transitions. Word has length 392 [2021-12-17 04:38:08,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:08,771 INFO L470 AbstractCegarLoop]: Abstraction has 94956 states and 107222 transitions. [2021-12-17 04:38:08,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:08,771 INFO L276 IsEmpty]: Start isEmpty. Operand 94956 states and 107222 transitions. [2021-12-17 04:38:08,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2021-12-17 04:38:08,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:08,781 INFO L514 BasicCegarLoop]: 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:38:08,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 04:38:08,782 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:08,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:08,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1585588610, now seen corresponding path program 1 times [2021-12-17 04:38:08,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:08,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772861726] [2021-12-17 04:38:08,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:08,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:08,962 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 308 proven. 110 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-17 04:38:08,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:08,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772861726] [2021-12-17 04:38:08,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772861726] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:38:08,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055797904] [2021-12-17 04:38:08,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:08,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:38:08,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:38:08,965 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) [2021-12-17 04:38:09,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 04:38:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:09,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:38:09,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:38:09,909 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 339 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-17 04:38:09,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:38:09,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055797904] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:09,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:38:09,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-17 04:38:09,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475192856] [2021-12-17 04:38:09,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:09,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:38:09,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:09,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:38:09,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:38:09,911 INFO L87 Difference]: Start difference. First operand 94956 states and 107222 transitions. Second operand has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:13,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:13,089 INFO L93 Difference]: Finished difference Result 200107 states and 226669 transitions. [2021-12-17 04:38:13,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:38:13,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 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 466 [2021-12-17 04:38:13,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:13,473 INFO L225 Difference]: With dead ends: 200107 [2021-12-17 04:38:13,473 INFO L226 Difference]: Without dead ends: 105940 [2021-12-17 04:38:13,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:38:13,504 INFO L933 BasicCegarLoop]: 393 mSDtfsCounter, 1138 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 2262 mSolverCounterSat, 913 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 3175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 913 IncrementalHoareTripleChecker+Valid, 2262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:13,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1138 Valid, 411 Invalid, 3175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [913 Valid, 2262 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 04:38:13,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105940 states. [2021-12-17 04:38:14,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105940 to 105938. [2021-12-17 04:38:14,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105938 states, 105937 states have (on average 1.1175509972908426) internal successors, (118390), 105937 states have internal predecessors, (118390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:14,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105938 states to 105938 states and 118390 transitions. [2021-12-17 04:38:14,836 INFO L78 Accepts]: Start accepts. Automaton has 105938 states and 118390 transitions. Word has length 466 [2021-12-17 04:38:14,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:14,837 INFO L470 AbstractCegarLoop]: Abstraction has 105938 states and 118390 transitions. [2021-12-17 04:38:14,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:14,837 INFO L276 IsEmpty]: Start isEmpty. Operand 105938 states and 118390 transitions. [2021-12-17 04:38:14,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2021-12-17 04:38:14,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:14,862 INFO L514 BasicCegarLoop]: 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:38:14,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 04:38:15,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:38:15,075 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:15,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:15,075 INFO L85 PathProgramCache]: Analyzing trace with hash 952537024, now seen corresponding path program 1 times [2021-12-17 04:38:15,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:15,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476691589] [2021-12-17 04:38:15,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:15,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:15,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 448 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-17 04:38:15,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:15,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476691589] [2021-12-17 04:38:15,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476691589] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:15,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:38:15,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:38:15,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843958025] [2021-12-17 04:38:15,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:15,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:38:15,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:15,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:38:15,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:15,189 INFO L87 Difference]: Start difference. First operand 105938 states and 118390 transitions. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:18,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:18,829 INFO L93 Difference]: Finished difference Result 229981 states and 258910 transitions. [2021-12-17 04:38:18,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:38:18,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 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 484 [2021-12-17 04:38:18,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:18,993 INFO L225 Difference]: With dead ends: 229981 [2021-12-17 04:38:18,993 INFO L226 Difference]: Without dead ends: 124832 [2021-12-17 04:38:19,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:19,057 INFO L933 BasicCegarLoop]: 1747 mSDtfsCounter, 723 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 2526 mSolverCounterSat, 684 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 1891 SdHoareTripleChecker+Invalid, 3210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 684 IncrementalHoareTripleChecker+Valid, 2526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:19,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [723 Valid, 1891 Invalid, 3210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [684 Valid, 2526 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-17 04:38:19,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124832 states. [2021-12-17 04:38:20,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124832 to 122450. [2021-12-17 04:38:20,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122450 states, 122449 states have (on average 1.1020588163235305) internal successors, (134946), 122449 states have internal predecessors, (134946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:20,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122450 states to 122450 states and 134946 transitions. [2021-12-17 04:38:20,498 INFO L78 Accepts]: Start accepts. Automaton has 122450 states and 134946 transitions. Word has length 484 [2021-12-17 04:38:20,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:20,498 INFO L470 AbstractCegarLoop]: Abstraction has 122450 states and 134946 transitions. [2021-12-17 04:38:20,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:20,499 INFO L276 IsEmpty]: Start isEmpty. Operand 122450 states and 134946 transitions. [2021-12-17 04:38:20,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 598 [2021-12-17 04:38:20,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:20,520 INFO L514 BasicCegarLoop]: 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:38:20,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 04:38:20,520 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:20,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:20,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1129725393, now seen corresponding path program 1 times [2021-12-17 04:38:20,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:20,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20528137] [2021-12-17 04:38:20,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:20,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:20,654 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 489 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-17 04:38:20,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:20,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20528137] [2021-12-17 04:38:20,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20528137] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:20,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:38:20,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:38:20,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965338844] [2021-12-17 04:38:20,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:20,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:38:20,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:20,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:38:20,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:38:20,658 INFO L87 Difference]: Start difference. First operand 122450 states and 134946 transitions. Second operand has 4 states, 4 states have (on average 141.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:25,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:25,069 INFO L93 Difference]: Finished difference Result 262999 states and 289444 transitions. [2021-12-17 04:38:25,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:38:25,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 141.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 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 597 [2021-12-17 04:38:25,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:25,252 INFO L225 Difference]: With dead ends: 262999 [2021-12-17 04:38:25,252 INFO L226 Difference]: Without dead ends: 130317 [2021-12-17 04:38:25,321 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:38:25,322 INFO L933 BasicCegarLoop]: 792 mSDtfsCounter, 1354 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 4565 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1354 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 5033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 4565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:25,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1354 Valid, 1088 Invalid, 5033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 4565 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-17 04:38:25,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130317 states. [2021-12-17 04:38:26,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130317 to 129529. [2021-12-17 04:38:26,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129529 states, 129528 states have (on average 1.0860740534865048) internal successors, (140677), 129528 states have internal predecessors, (140677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:27,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129529 states to 129529 states and 140677 transitions. [2021-12-17 04:38:27,027 INFO L78 Accepts]: Start accepts. Automaton has 129529 states and 140677 transitions. Word has length 597 [2021-12-17 04:38:27,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:27,027 INFO L470 AbstractCegarLoop]: Abstraction has 129529 states and 140677 transitions. [2021-12-17 04:38:27,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 141.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:27,027 INFO L276 IsEmpty]: Start isEmpty. Operand 129529 states and 140677 transitions. [2021-12-17 04:38:27,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 656 [2021-12-17 04:38:27,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:27,053 INFO L514 BasicCegarLoop]: 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:38:27,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 04:38:27,053 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:27,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:27,054 INFO L85 PathProgramCache]: Analyzing trace with hash 38075898, now seen corresponding path program 1 times [2021-12-17 04:38:27,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:27,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616219264] [2021-12-17 04:38:27,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:27,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:27,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 895 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-12-17 04:38:27,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:27,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616219264] [2021-12-17 04:38:27,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616219264] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:27,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:38:27,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:38:27,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633930232] [2021-12-17 04:38:27,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:27,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:38:27,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:27,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:38:27,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:27,237 INFO L87 Difference]: Start difference. First operand 129529 states and 140677 transitions. Second operand has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:30,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:30,576 INFO L93 Difference]: Finished difference Result 258268 states and 280566 transitions. [2021-12-17 04:38:30,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:38:30,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 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 655 [2021-12-17 04:38:30,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:30,750 INFO L225 Difference]: With dead ends: 258268 [2021-12-17 04:38:30,751 INFO L226 Difference]: Without dead ends: 129528 [2021-12-17 04:38:30,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:30,829 INFO L933 BasicCegarLoop]: 1345 mSDtfsCounter, 832 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2368 mSolverCounterSat, 560 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 1427 SdHoareTripleChecker+Invalid, 2928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 560 IncrementalHoareTripleChecker+Valid, 2368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:30,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 1427 Invalid, 2928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [560 Valid, 2368 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:38:30,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129528 states. [2021-12-17 04:38:32,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129528 to 129511. [2021-12-17 04:38:32,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129511 states, 129510 states have (on average 1.0642884719326693) internal successors, (137836), 129510 states have internal predecessors, (137836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:32,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129511 states to 129511 states and 137836 transitions. [2021-12-17 04:38:32,671 INFO L78 Accepts]: Start accepts. Automaton has 129511 states and 137836 transitions. Word has length 655 [2021-12-17 04:38:32,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:32,671 INFO L470 AbstractCegarLoop]: Abstraction has 129511 states and 137836 transitions. [2021-12-17 04:38:32,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:32,672 INFO L276 IsEmpty]: Start isEmpty. Operand 129511 states and 137836 transitions. [2021-12-17 04:38:32,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 658 [2021-12-17 04:38:32,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:32,691 INFO L514 BasicCegarLoop]: 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:38:32,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 04:38:32,691 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:32,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:32,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1567523121, now seen corresponding path program 1 times [2021-12-17 04:38:32,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:32,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766903681] [2021-12-17 04:38:32,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:32,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 643 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-17 04:38:32,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:32,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766903681] [2021-12-17 04:38:32,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766903681] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:32,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:38:32,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:38:32,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530993178] [2021-12-17 04:38:32,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:32,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:38:32,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:32,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:38:32,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:38:32,851 INFO L87 Difference]: Start difference. First operand 129511 states and 137836 transitions. Second operand has 4 states, 4 states have (on average 134.25) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:38,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:38,016 INFO L93 Difference]: Finished difference Result 327537 states and 348867 transitions. [2021-12-17 04:38:38,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:38:38,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 134.25) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 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 657 [2021-12-17 04:38:38,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:38,376 INFO L225 Difference]: With dead ends: 327537 [2021-12-17 04:38:38,376 INFO L226 Difference]: Without dead ends: 198815 [2021-12-17 04:38:38,479 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:38:38,480 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 1537 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 4356 mSolverCounterSat, 520 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 4876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 520 IncrementalHoareTripleChecker+Valid, 4356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:38,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1537 Valid, 807 Invalid, 4876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [520 Valid, 4356 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-12-17 04:38:38,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198815 states. [2021-12-17 04:38:40,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198815 to 187773. [2021-12-17 04:38:40,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187773 states, 187772 states have (on average 1.061159278273651) internal successors, (199256), 187772 states have internal predecessors, (199256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:40,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187773 states to 187773 states and 199256 transitions. [2021-12-17 04:38:40,816 INFO L78 Accepts]: Start accepts. Automaton has 187773 states and 199256 transitions. Word has length 657 [2021-12-17 04:38:40,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:40,816 INFO L470 AbstractCegarLoop]: Abstraction has 187773 states and 199256 transitions. [2021-12-17 04:38:40,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.25) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:40,817 INFO L276 IsEmpty]: Start isEmpty. Operand 187773 states and 199256 transitions. [2021-12-17 04:38:40,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 978 [2021-12-17 04:38:40,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:40,889 INFO L514 BasicCegarLoop]: 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:38:40,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 04:38:40,889 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:40,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:40,890 INFO L85 PathProgramCache]: Analyzing trace with hash -2075315642, now seen corresponding path program 1 times [2021-12-17 04:38:40,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:40,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659288281] [2021-12-17 04:38:40,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:40,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:41,679 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 448 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-17 04:38:41,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:41,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659288281] [2021-12-17 04:38:41,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659288281] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:41,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:38:41,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:38:41,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152053734] [2021-12-17 04:38:41,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:41,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:38:41,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:41,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:38:41,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:41,682 INFO L87 Difference]: Start difference. First operand 187773 states and 199256 transitions. Second operand has 3 states, 3 states have (on average 265.0) internal successors, (795), 3 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:44,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:44,990 INFO L93 Difference]: Finished difference Result 356654 states and 379170 transitions. [2021-12-17 04:38:44,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:38:44,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 265.0) internal successors, (795), 3 states have internal predecessors, (795), 0 states have call successors, (0), 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 977 [2021-12-17 04:38:44,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:45,211 INFO L225 Difference]: With dead ends: 356654 [2021-12-17 04:38:45,211 INFO L226 Difference]: Without dead ends: 188566 [2021-12-17 04:38:45,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:45,272 INFO L933 BasicCegarLoop]: 1707 mSDtfsCounter, 171 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 2423 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1832 SdHoareTripleChecker+Invalid, 2453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:45,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 1832 Invalid, 2453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2423 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:38:45,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188566 states. [2021-12-17 04:38:47,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188566 to 188561. [2021-12-17 04:38:47,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188561 states, 188560 states have (on average 1.0610415782774714) internal successors, (200070), 188560 states have internal predecessors, (200070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:47,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188561 states to 188561 states and 200070 transitions. [2021-12-17 04:38:47,505 INFO L78 Accepts]: Start accepts. Automaton has 188561 states and 200070 transitions. Word has length 977 [2021-12-17 04:38:47,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:38:47,506 INFO L470 AbstractCegarLoop]: Abstraction has 188561 states and 200070 transitions. [2021-12-17 04:38:47,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 265.0) internal successors, (795), 3 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:47,506 INFO L276 IsEmpty]: Start isEmpty. Operand 188561 states and 200070 transitions. [2021-12-17 04:38:47,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 984 [2021-12-17 04:38:47,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:38:47,575 INFO L514 BasicCegarLoop]: 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:38:47,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 04:38:47,576 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:38:47,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:38:47,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1382867762, now seen corresponding path program 1 times [2021-12-17 04:38:47,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:38:47,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033564591] [2021-12-17 04:38:47,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:38:47,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:38:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:38:48,161 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 598 trivial. 0 not checked. [2021-12-17 04:38:48,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:38:48,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033564591] [2021-12-17 04:38:48,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033564591] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:38:48,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:38:48,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:38:48,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886599336] [2021-12-17 04:38:48,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:38:48,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:38:48,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:38:48,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:38:48,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:48,164 INFO L87 Difference]: Start difference. First operand 188561 states and 200070 transitions. Second operand has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:38:52,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:38:52,327 INFO L93 Difference]: Finished difference Result 422907 states and 450263 transitions. [2021-12-17 04:38:52,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:38:52,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 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 983 [2021-12-17 04:38:52,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:38:52,622 INFO L225 Difference]: With dead ends: 422907 [2021-12-17 04:38:52,622 INFO L226 Difference]: Without dead ends: 254031 [2021-12-17 04:38:52,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:38:52,700 INFO L933 BasicCegarLoop]: 504 mSDtfsCounter, 967 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2789 mSolverCounterSat, 680 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 967 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 3469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 680 IncrementalHoareTripleChecker+Valid, 2789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:38:52,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [967 Valid, 585 Invalid, 3469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [680 Valid, 2789 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-17 04:38:52,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254031 states.