./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem16_label16.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/Problem16_label16.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 6a9abcfae74a76ffd8cfeb07527f27fd22a6ecfb39955551233acb9bdc6f8719 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:56:26,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:56:26,275 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:56:26,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:56:26,329 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:56:26,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:56:26,333 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:56:26,334 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:56:26,335 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:56:26,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:56:26,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:56:26,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:56:26,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:56:26,344 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:56:26,345 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:56:26,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:56:26,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:56:26,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:56:26,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:56:26,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:56:26,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:56:26,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:56:26,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:56:26,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:56:26,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:56:26,368 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:56:26,368 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:56:26,369 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:56:26,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:56:26,373 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:56:26,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:56:26,374 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:56:26,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:56:26,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:56:26,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:56:26,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:56:26,378 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:56:26,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:56:26,379 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:56:26,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:56:26,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:56:26,381 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:56:26,408 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:56:26,408 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:56:26,409 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:56:26,409 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:56:26,410 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:56:26,410 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:56:26,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:56:26,411 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:56:26,411 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:56:26,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:56:26,412 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:56:26,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:56:26,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:56:26,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:56:26,413 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:56:26,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:56:26,413 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:56:26,413 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:56:26,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:56:26,414 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:56:26,414 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:56:26,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:56:26,414 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:56:26,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:56:26,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:56:26,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:56:26,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:56:26,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:56:26,415 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:56:26,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:56:26,415 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:56:26,415 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:56:26,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:56:26,416 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:56:26,416 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6a9abcfae74a76ffd8cfeb07527f27fd22a6ecfb39955551233acb9bdc6f8719 [2021-12-15 22:56:26,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:56:26,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:56:26,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:56:26,667 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:56:26,668 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:56:26,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label16.c [2021-12-15 22:56:26,734 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/836a3e4cf/1087d793226448f484f41674899d4913/FLAG684f59125 [2021-12-15 22:56:27,299 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:56:27,299 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label16.c [2021-12-15 22:56:27,313 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/836a3e4cf/1087d793226448f484f41674899d4913/FLAG684f59125 [2021-12-15 22:56:27,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/836a3e4cf/1087d793226448f484f41674899d4913 [2021-12-15 22:56:27,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:56:27,597 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:56:27,599 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:56:27,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:56:27,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:56:27,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:56:27" (1/1) ... [2021-12-15 22:56:27,603 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48436ff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:27, skipping insertion in model container [2021-12-15 22:56:27,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:56:27" (1/1) ... [2021-12-15 22:56:27,610 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:56:27,661 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:56:27,870 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/Problem16_label16.c[4534,4547] [2021-12-15 22:56:28,195 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:56:28,202 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:56:28,233 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/Problem16_label16.c[4534,4547] [2021-12-15 22:56:28,341 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:56:28,353 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:56:28,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:28 WrapperNode [2021-12-15 22:56:28,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:56:28,354 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:56:28,354 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:56:28,354 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:56:28,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:28" (1/1) ... [2021-12-15 22:56:28,382 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:28" (1/1) ... [2021-12-15 22:56:28,485 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1768 [2021-12-15 22:56:28,485 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:56:28,486 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:56:28,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:56:28,486 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:56:28,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:28" (1/1) ... [2021-12-15 22:56:28,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:28" (1/1) ... [2021-12-15 22:56:28,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:28" (1/1) ... [2021-12-15 22:56:28,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:28" (1/1) ... [2021-12-15 22:56:28,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:28" (1/1) ... [2021-12-15 22:56:28,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:28" (1/1) ... [2021-12-15 22:56:28,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:28" (1/1) ... [2021-12-15 22:56:28,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:56:28,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:56:28,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:56:28,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:56:28,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:28" (1/1) ... [2021-12-15 22:56:28,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:56:28,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:56:28,655 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) [2021-12-15 22:56:28,672 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 [2021-12-15 22:56:28,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:56:28,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:56:28,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:56:28,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:56:28,739 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:56:28,740 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:56:30,187 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:56:30,201 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:56:30,202 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:56:30,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:56:30 BoogieIcfgContainer [2021-12-15 22:56:30,204 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:56:30,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:56:30,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:56:30,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:56:30,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:56:27" (1/3) ... [2021-12-15 22:56:30,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39336672 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:56:30, skipping insertion in model container [2021-12-15 22:56:30,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:56:28" (2/3) ... [2021-12-15 22:56:30,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39336672 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:56:30, skipping insertion in model container [2021-12-15 22:56:30,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:56:30" (3/3) ... [2021-12-15 22:56:30,210 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label16.c [2021-12-15 22:56:30,214 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:56:30,214 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:56:30,274 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:56:30,282 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 [2021-12-15 22:56:30,282 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:56:30,311 INFO L276 IsEmpty]: Start isEmpty. Operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:30,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-15 22:56:30,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:30,321 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, 1, 1, 1, 1, 1, 1] [2021-12-15 22:56:30,322 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:30,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:30,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1824112922, now seen corresponding path program 1 times [2021-12-15 22:56:30,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:30,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714700476] [2021-12-15 22:56:30,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:30,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:56:30,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:30,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714700476] [2021-12-15 22:56:30,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714700476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:30,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:56:30,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:56:30,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760802893] [2021-12-15 22:56:30,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:30,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:56:30,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:30,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:56:30,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:56:30,565 INFO L87 Difference]: Start difference. First operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:32,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:32,004 INFO L93 Difference]: Finished difference Result 1122 states and 2103 transitions. [2021-12-15 22:56:32,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:56:32,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-12-15 22:56:32,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:32,017 INFO L225 Difference]: With dead ends: 1122 [2021-12-15 22:56:32,018 INFO L226 Difference]: Without dead ends: 662 [2021-12-15 22:56:32,021 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 [2021-12-15 22:56:32,023 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 345 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:32,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 254 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 22:56:32,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-12-15 22:56:32,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2021-12-15 22:56:32,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.518910741301059) internal successors, (1004), 661 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:32,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1004 transitions. [2021-12-15 22:56:32,090 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1004 transitions. Word has length 42 [2021-12-15 22:56:32,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:32,090 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1004 transitions. [2021-12-15 22:56:32,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:32,091 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1004 transitions. [2021-12-15 22:56:32,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-15 22:56:32,095 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:32,095 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, 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] [2021-12-15 22:56:32,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:56:32,096 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:32,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:32,098 INFO L85 PathProgramCache]: Analyzing trace with hash -567825388, now seen corresponding path program 1 times [2021-12-15 22:56:32,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:32,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950631977] [2021-12-15 22:56:32,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:32,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:32,246 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:56:32,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:32,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950631977] [2021-12-15 22:56:32,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950631977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:32,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:56:32,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:56:32,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075749936] [2021-12-15 22:56:32,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:32,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:56:32,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:32,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:56:32,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:56:32,253 INFO L87 Difference]: Start difference. First operand 662 states and 1004 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:33,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:33,889 INFO L93 Difference]: Finished difference Result 2309 states and 3414 transitions. [2021-12-15 22:56:33,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:56:33,890 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-12-15 22:56:33,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:33,895 INFO L225 Difference]: With dead ends: 2309 [2021-12-15 22:56:33,895 INFO L226 Difference]: Without dead ends: 1649 [2021-12-15 22:56:33,896 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 [2021-12-15 22:56:33,899 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 1002 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1002 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:33,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1002 Valid, 42 Invalid, 1991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 1496 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 22:56:33,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2021-12-15 22:56:33,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1649. [2021-12-15 22:56:33,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 1.4016990291262137) internal successors, (2310), 1648 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:33,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2310 transitions. [2021-12-15 22:56:33,945 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2310 transitions. Word has length 110 [2021-12-15 22:56:33,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:33,948 INFO L470 AbstractCegarLoop]: Abstraction has 1649 states and 2310 transitions. [2021-12-15 22:56:33,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:33,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2310 transitions. [2021-12-15 22:56:33,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-15 22:56:33,958 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:33,959 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, 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] [2021-12-15 22:56:33,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 22:56:33,961 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:33,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:33,962 INFO L85 PathProgramCache]: Analyzing trace with hash -554645509, now seen corresponding path program 1 times [2021-12-15 22:56:33,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:33,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945296202] [2021-12-15 22:56:33,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:33,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:34,139 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:56:34,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:34,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945296202] [2021-12-15 22:56:34,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945296202] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:34,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:56:34,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:56:34,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54532104] [2021-12-15 22:56:34,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:34,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:56:34,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:34,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:56:34,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:56:34,142 INFO L87 Difference]: Start difference. First operand 1649 states and 2310 transitions. Second operand has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:35,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:35,273 INFO L93 Difference]: Finished difference Result 2981 states and 4291 transitions. [2021-12-15 22:56:35,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 22:56:35,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 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 173 [2021-12-15 22:56:35,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:35,278 INFO L225 Difference]: With dead ends: 2981 [2021-12-15 22:56:35,278 INFO L226 Difference]: Without dead ends: 1663 [2021-12-15 22:56:35,280 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 [2021-12-15 22:56:35,284 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 409 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:35,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 371 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-15 22:56:35,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2021-12-15 22:56:35,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1649. [2021-12-15 22:56:35,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 1.3980582524271845) internal successors, (2304), 1648 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:35,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2304 transitions. [2021-12-15 22:56:35,322 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2304 transitions. Word has length 173 [2021-12-15 22:56:35,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:35,323 INFO L470 AbstractCegarLoop]: Abstraction has 1649 states and 2304 transitions. [2021-12-15 22:56:35,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:35,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2304 transitions. [2021-12-15 22:56:35,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-15 22:56:35,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:35,326 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:56:35,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 22:56:35,327 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:35,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:35,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1296418382, now seen corresponding path program 1 times [2021-12-15 22:56:35,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:35,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317407086] [2021-12-15 22:56:35,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:35,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:35,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-15 22:56:35,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:35,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317407086] [2021-12-15 22:56:35,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317407086] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:35,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:56:35,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:56:35,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635865897] [2021-12-15 22:56:35,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:35,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:56:35,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:35,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:56:35,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:56:35,458 INFO L87 Difference]: Start difference. First operand 1649 states and 2304 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:36,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:36,506 INFO L93 Difference]: Finished difference Result 4283 states and 6237 transitions. [2021-12-15 22:56:36,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:56:36,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2021-12-15 22:56:36,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:36,518 INFO L225 Difference]: With dead ends: 4283 [2021-12-15 22:56:36,518 INFO L226 Difference]: Without dead ends: 2965 [2021-12-15 22:56:36,521 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 [2021-12-15 22:56:36,524 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 359 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:36,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 155 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 22:56:36,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2021-12-15 22:56:36,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2307. [2021-12-15 22:56:36,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 2306 states have (on average 1.349956634865568) internal successors, (3113), 2306 states have internal predecessors, (3113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:36,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 3113 transitions. [2021-12-15 22:56:36,586 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 3113 transitions. Word has length 208 [2021-12-15 22:56:36,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:36,587 INFO L470 AbstractCegarLoop]: Abstraction has 2307 states and 3113 transitions. [2021-12-15 22:56:36,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:36,588 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 3113 transitions. [2021-12-15 22:56:36,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-12-15 22:56:36,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:36,590 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:56:36,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:56:36,590 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:36,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:36,591 INFO L85 PathProgramCache]: Analyzing trace with hash 449863901, now seen corresponding path program 1 times [2021-12-15 22:56:36,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:36,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397334688] [2021-12-15 22:56:36,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:36,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:36,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:36,708 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:56:36,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:36,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397334688] [2021-12-15 22:56:36,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397334688] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:36,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:56:36,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:56:36,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995856113] [2021-12-15 22:56:36,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:36,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:56:36,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:36,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:56:36,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:56:36,712 INFO L87 Difference]: Start difference. First operand 2307 states and 3113 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:37,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:37,735 INFO L93 Difference]: Finished difference Result 5599 states and 7663 transitions. [2021-12-15 22:56:37,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:56:37,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 225 [2021-12-15 22:56:37,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:37,746 INFO L225 Difference]: With dead ends: 5599 [2021-12-15 22:56:37,746 INFO L226 Difference]: Without dead ends: 3294 [2021-12-15 22:56:37,749 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 [2021-12-15 22:56:37,750 INFO L933 BasicCegarLoop]: 534 mSDtfsCounter, 287 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:37,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 539 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 22:56:37,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3294 states. [2021-12-15 22:56:37,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3294 to 3294. [2021-12-15 22:56:37,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3294 states, 3293 states have (on average 1.0974795019738839) internal successors, (3614), 3293 states have internal predecessors, (3614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:37,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3294 states to 3294 states and 3614 transitions. [2021-12-15 22:56:37,823 INFO L78 Accepts]: Start accepts. Automaton has 3294 states and 3614 transitions. Word has length 225 [2021-12-15 22:56:37,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:37,824 INFO L470 AbstractCegarLoop]: Abstraction has 3294 states and 3614 transitions. [2021-12-15 22:56:37,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:37,827 INFO L276 IsEmpty]: Start isEmpty. Operand 3294 states and 3614 transitions. [2021-12-15 22:56:37,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-12-15 22:56:37,828 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:37,829 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, 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] [2021-12-15 22:56:37,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:56:37,830 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:37,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:37,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1097844215, now seen corresponding path program 1 times [2021-12-15 22:56:37,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:37,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737146513] [2021-12-15 22:56:37,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:37,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:37,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:37,930 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:56:37,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:37,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737146513] [2021-12-15 22:56:37,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737146513] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:37,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:56:37,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:56:37,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605065787] [2021-12-15 22:56:37,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:37,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:56:37,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:37,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:56:37,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:56:37,934 INFO L87 Difference]: Start difference. First operand 3294 states and 3614 transitions. Second operand has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:38,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:38,650 INFO L93 Difference]: Finished difference Result 7573 states and 8346 transitions. [2021-12-15 22:56:38,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:56:38,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 277 [2021-12-15 22:56:38,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:38,665 INFO L225 Difference]: With dead ends: 7573 [2021-12-15 22:56:38,666 INFO L226 Difference]: Without dead ends: 4281 [2021-12-15 22:56:38,670 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 [2021-12-15 22:56:38,672 INFO L933 BasicCegarLoop]: 416 mSDtfsCounter, 295 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:38,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 422 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:56:38,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4281 states. [2021-12-15 22:56:38,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4281 to 4281. [2021-12-15 22:56:38,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4281 states, 4280 states have (on average 1.0628504672897197) internal successors, (4549), 4280 states have internal predecessors, (4549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:38,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4281 states to 4281 states and 4549 transitions. [2021-12-15 22:56:38,743 INFO L78 Accepts]: Start accepts. Automaton has 4281 states and 4549 transitions. Word has length 277 [2021-12-15 22:56:38,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:38,744 INFO L470 AbstractCegarLoop]: Abstraction has 4281 states and 4549 transitions. [2021-12-15 22:56:38,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:38,744 INFO L276 IsEmpty]: Start isEmpty. Operand 4281 states and 4549 transitions. [2021-12-15 22:56:38,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2021-12-15 22:56:38,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:38,747 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:56:38,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:56:38,748 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:38,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:38,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1997476393, now seen corresponding path program 1 times [2021-12-15 22:56:38,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:38,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083556148] [2021-12-15 22:56:38,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:38,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-15 22:56:38,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:38,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083556148] [2021-12-15 22:56:38,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083556148] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:38,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:56:38,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:56:38,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779193354] [2021-12-15 22:56:38,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:38,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:56:38,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:38,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:56:38,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:56:38,860 INFO L87 Difference]: Start difference. First operand 4281 states and 4549 transitions. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:39,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:39,579 INFO L93 Difference]: Finished difference Result 9547 states and 10215 transitions. [2021-12-15 22:56:39,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:56:39,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 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 381 [2021-12-15 22:56:39,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:39,593 INFO L225 Difference]: With dead ends: 9547 [2021-12-15 22:56:39,593 INFO L226 Difference]: Without dead ends: 5268 [2021-12-15 22:56:39,599 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 [2021-12-15 22:56:39,602 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 306 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:39,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 39 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:56:39,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2021-12-15 22:56:39,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 5268. [2021-12-15 22:56:39,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5268 states, 5267 states have (on average 1.0683501044237707) internal successors, (5627), 5267 states have internal predecessors, (5627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:39,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5268 states to 5268 states and 5627 transitions. [2021-12-15 22:56:39,682 INFO L78 Accepts]: Start accepts. Automaton has 5268 states and 5627 transitions. Word has length 381 [2021-12-15 22:56:39,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:39,683 INFO L470 AbstractCegarLoop]: Abstraction has 5268 states and 5627 transitions. [2021-12-15 22:56:39,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:39,683 INFO L276 IsEmpty]: Start isEmpty. Operand 5268 states and 5627 transitions. [2021-12-15 22:56:39,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2021-12-15 22:56:39,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:39,687 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, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:56:39,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 22:56:39,688 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:39,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:39,689 INFO L85 PathProgramCache]: Analyzing trace with hash -391836517, now seen corresponding path program 1 times [2021-12-15 22:56:39,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:39,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527458796] [2021-12-15 22:56:39,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:39,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 105 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:56:39,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:39,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527458796] [2021-12-15 22:56:39,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527458796] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:56:39,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106747058] [2021-12-15 22:56:39,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:39,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:56:39,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:56:39,845 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) [2021-12-15 22:56:39,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 22:56:39,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:39,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:56:40,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:56:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-15 22:56:40,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:56:40,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106747058] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:40,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:56:40,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-12-15 22:56:40,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649215387] [2021-12-15 22:56:40,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:40,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:56:40,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:40,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:56:40,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:56:40,809 INFO L87 Difference]: Start difference. First operand 5268 states and 5627 transitions. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 2 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:41,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:41,604 INFO L93 Difference]: Finished difference Result 11521 states and 12314 transitions. [2021-12-15 22:56:41,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:56:41,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 2 states have internal predecessors, (279), 0 states have call successors, (0), 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 405 [2021-12-15 22:56:41,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:41,621 INFO L225 Difference]: With dead ends: 11521 [2021-12-15 22:56:41,622 INFO L226 Difference]: Without dead ends: 6584 [2021-12-15 22:56:41,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:56:41,628 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 127 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:41,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 31 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:56:41,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6584 states. [2021-12-15 22:56:41,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6584 to 6584. [2021-12-15 22:56:41,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6584 states, 6583 states have (on average 1.052863436123348) internal successors, (6931), 6583 states have internal predecessors, (6931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:41,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6584 states to 6584 states and 6931 transitions. [2021-12-15 22:56:41,707 INFO L78 Accepts]: Start accepts. Automaton has 6584 states and 6931 transitions. Word has length 405 [2021-12-15 22:56:41,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:41,707 INFO L470 AbstractCegarLoop]: Abstraction has 6584 states and 6931 transitions. [2021-12-15 22:56:41,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 2 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:41,708 INFO L276 IsEmpty]: Start isEmpty. Operand 6584 states and 6931 transitions. [2021-12-15 22:56:41,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2021-12-15 22:56:41,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:41,713 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, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:56:41,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 22:56:41,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:56:41,933 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:41,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:41,934 INFO L85 PathProgramCache]: Analyzing trace with hash -736572496, now seen corresponding path program 1 times [2021-12-15 22:56:41,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:41,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793896662] [2021-12-15 22:56:41,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:41,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:42,074 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-12-15 22:56:42,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:42,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793896662] [2021-12-15 22:56:42,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793896662] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:56:42,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026349127] [2021-12-15 22:56:42,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:42,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:56:42,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:56:42,078 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) [2021-12-15 22:56:42,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 22:56:42,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:42,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:56:42,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:56:42,926 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-12-15 22:56:42,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:56:42,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026349127] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:42,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:56:42,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 22:56:42,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205076503] [2021-12-15 22:56:42,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:42,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:56:42,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:42,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:56:42,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:56:42,928 INFO L87 Difference]: Start difference. First operand 6584 states and 6931 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 2 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:43,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:43,659 INFO L93 Difference]: Finished difference Result 7902 states and 8284 transitions. [2021-12-15 22:56:43,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:56:43,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 2 states have internal predecessors, (240), 0 states have call successors, (0), 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 435 [2021-12-15 22:56:43,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:43,675 INFO L225 Difference]: With dead ends: 7902 [2021-12-15 22:56:43,675 INFO L226 Difference]: Without dead ends: 7900 [2021-12-15 22:56:43,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:56:43,703 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 116 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:43,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 78 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:56:43,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7900 states. [2021-12-15 22:56:43,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7900 to 6913. [2021-12-15 22:56:43,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6913 states, 6912 states have (on average 1.0522280092592593) internal successors, (7273), 6912 states have internal predecessors, (7273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:43,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6913 states to 6913 states and 7273 transitions. [2021-12-15 22:56:43,790 INFO L78 Accepts]: Start accepts. Automaton has 6913 states and 7273 transitions. Word has length 435 [2021-12-15 22:56:43,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:43,790 INFO L470 AbstractCegarLoop]: Abstraction has 6913 states and 7273 transitions. [2021-12-15 22:56:43,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 2 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:43,791 INFO L276 IsEmpty]: Start isEmpty. Operand 6913 states and 7273 transitions. [2021-12-15 22:56:43,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 845 [2021-12-15 22:56:43,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:43,800 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:56:43,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 22:56:44,015 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 [2021-12-15 22:56:44,016 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:44,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:44,016 INFO L85 PathProgramCache]: Analyzing trace with hash 777112941, now seen corresponding path program 1 times [2021-12-15 22:56:44,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:44,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419179728] [2021-12-15 22:56:44,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:44,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:44,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:44,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1307 backedges. 896 proven. 0 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2021-12-15 22:56:44,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:44,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419179728] [2021-12-15 22:56:44,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419179728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:44,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:56:44,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:56:44,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221093495] [2021-12-15 22:56:44,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:44,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:56:44,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:44,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:56:44,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:56:44,204 INFO L87 Difference]: Start difference. First operand 6913 states and 7273 transitions. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:44,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:44,990 INFO L93 Difference]: Finished difference Result 15469 states and 16329 transitions. [2021-12-15 22:56:44,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:56:44,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 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 844 [2021-12-15 22:56:44,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:45,003 INFO L225 Difference]: With dead ends: 15469 [2021-12-15 22:56:45,003 INFO L226 Difference]: Without dead ends: 8558 [2021-12-15 22:56:45,017 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 [2021-12-15 22:56:45,018 INFO L933 BasicCegarLoop]: 428 mSDtfsCounter, 220 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:45,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 434 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:56:45,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8558 states. [2021-12-15 22:56:45,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8558 to 8229. [2021-12-15 22:56:45,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8229 states, 8228 states have (on average 1.0469129800680603) internal successors, (8614), 8228 states have internal predecessors, (8614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:45,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8229 states to 8229 states and 8614 transitions. [2021-12-15 22:56:45,092 INFO L78 Accepts]: Start accepts. Automaton has 8229 states and 8614 transitions. Word has length 844 [2021-12-15 22:56:45,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:45,093 INFO L470 AbstractCegarLoop]: Abstraction has 8229 states and 8614 transitions. [2021-12-15 22:56:45,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:45,094 INFO L276 IsEmpty]: Start isEmpty. Operand 8229 states and 8614 transitions. [2021-12-15 22:56:45,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 892 [2021-12-15 22:56:45,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:45,104 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:56:45,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 22:56:45,105 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:45,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:45,105 INFO L85 PathProgramCache]: Analyzing trace with hash -539361717, now seen corresponding path program 1 times [2021-12-15 22:56:45,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:45,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962573644] [2021-12-15 22:56:45,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:45,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:45,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:45,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1403 backedges. 481 proven. 639 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2021-12-15 22:56:45,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:45,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962573644] [2021-12-15 22:56:45,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962573644] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:56:45,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112862780] [2021-12-15 22:56:45,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:45,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:56:45,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:56:45,409 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) [2021-12-15 22:56:45,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 22:56:45,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:45,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:56:45,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:56:46,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1403 backedges. 703 proven. 0 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2021-12-15 22:56:46,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:56:46,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112862780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:46,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:56:46,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-15 22:56:46,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250939211] [2021-12-15 22:56:46,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:46,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:56:46,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:46,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:56:46,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:56:46,620 INFO L87 Difference]: Start difference. First operand 8229 states and 8614 transitions. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:47,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:47,333 INFO L93 Difference]: Finished difference Result 16127 states and 16895 transitions. [2021-12-15 22:56:47,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:56:47,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 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 891 [2021-12-15 22:56:47,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:47,358 INFO L225 Difference]: With dead ends: 16127 [2021-12-15 22:56:47,358 INFO L226 Difference]: Without dead ends: 8229 [2021-12-15 22:56:47,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 895 GetRequests, 891 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:56:47,365 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 180 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:47,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 377 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:56:47,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8229 states. [2021-12-15 22:56:47,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8229 to 8229. [2021-12-15 22:56:47,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8229 states, 8228 states have (on average 1.0408361691784151) internal successors, (8564), 8228 states have internal predecessors, (8564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:47,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8229 states to 8229 states and 8564 transitions. [2021-12-15 22:56:47,440 INFO L78 Accepts]: Start accepts. Automaton has 8229 states and 8564 transitions. Word has length 891 [2021-12-15 22:56:47,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:47,440 INFO L470 AbstractCegarLoop]: Abstraction has 8229 states and 8564 transitions. [2021-12-15 22:56:47,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:47,441 INFO L276 IsEmpty]: Start isEmpty. Operand 8229 states and 8564 transitions. [2021-12-15 22:56:47,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1308 [2021-12-15 22:56:47,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:47,461 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:56:47,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 22:56:47,678 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 [2021-12-15 22:56:47,678 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:47,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:47,679 INFO L85 PathProgramCache]: Analyzing trace with hash 803981854, now seen corresponding path program 1 times [2021-12-15 22:56:47,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:47,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375876428] [2021-12-15 22:56:47,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:47,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3617 backedges. 2480 proven. 0 refuted. 0 times theorem prover too weak. 1137 trivial. 0 not checked. [2021-12-15 22:56:48,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:48,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375876428] [2021-12-15 22:56:48,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375876428] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:48,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:56:48,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:56:48,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66481579] [2021-12-15 22:56:48,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:48,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:56:48,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:48,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:56:48,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:56:48,017 INFO L87 Difference]: Start difference. First operand 8229 states and 8564 transitions. Second operand has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:48,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:48,680 INFO L93 Difference]: Finished difference Result 16127 states and 16795 transitions. [2021-12-15 22:56:48,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:56:48,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 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 1307 [2021-12-15 22:56:48,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:48,695 INFO L225 Difference]: With dead ends: 16127 [2021-12-15 22:56:48,695 INFO L226 Difference]: Without dead ends: 8229 [2021-12-15 22:56:48,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:56:48,703 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 211 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:48,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 38 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:56:48,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8229 states. [2021-12-15 22:56:48,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8229 to 8229. [2021-12-15 22:56:48,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8229 states, 8228 states have (on average 1.0364608653378706) internal successors, (8528), 8228 states have internal predecessors, (8528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:48,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8229 states to 8229 states and 8528 transitions. [2021-12-15 22:56:48,856 INFO L78 Accepts]: Start accepts. Automaton has 8229 states and 8528 transitions. Word has length 1307 [2021-12-15 22:56:48,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:48,857 INFO L470 AbstractCegarLoop]: Abstraction has 8229 states and 8528 transitions. [2021-12-15 22:56:48,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:48,857 INFO L276 IsEmpty]: Start isEmpty. Operand 8229 states and 8528 transitions. [2021-12-15 22:56:48,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1336 [2021-12-15 22:56:48,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:48,883 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:56:48,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 22:56:48,883 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:48,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:48,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1313536106, now seen corresponding path program 1 times [2021-12-15 22:56:48,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:48,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017920704] [2021-12-15 22:56:48,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:48,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:48,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3753 backedges. 2335 proven. 0 refuted. 0 times theorem prover too weak. 1418 trivial. 0 not checked. [2021-12-15 22:56:49,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:49,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017920704] [2021-12-15 22:56:49,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017920704] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:49,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:56:49,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:56:49,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816000238] [2021-12-15 22:56:49,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:49,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:56:49,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:49,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:56:49,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:56:49,238 INFO L87 Difference]: Start difference. First operand 8229 states and 8528 transitions. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:49,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:49,993 INFO L93 Difference]: Finished difference Result 17114 states and 17725 transitions. [2021-12-15 22:56:49,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:56:49,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 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 1335 [2021-12-15 22:56:49,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:50,008 INFO L225 Difference]: With dead ends: 17114 [2021-12-15 22:56:50,008 INFO L226 Difference]: Without dead ends: 9216 [2021-12-15 22:56:50,017 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 [2021-12-15 22:56:50,017 INFO L933 BasicCegarLoop]: 435 mSDtfsCounter, 224 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:50,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 441 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:56:50,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9216 states. [2021-12-15 22:56:50,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9216 to 9216. [2021-12-15 22:56:50,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9216 states, 9215 states have (on average 1.0333152468800868) internal successors, (9522), 9215 states have internal predecessors, (9522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:50,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9216 states to 9216 states and 9522 transitions. [2021-12-15 22:56:50,107 INFO L78 Accepts]: Start accepts. Automaton has 9216 states and 9522 transitions. Word has length 1335 [2021-12-15 22:56:50,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:50,108 INFO L470 AbstractCegarLoop]: Abstraction has 9216 states and 9522 transitions. [2021-12-15 22:56:50,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:50,108 INFO L276 IsEmpty]: Start isEmpty. Operand 9216 states and 9522 transitions. [2021-12-15 22:56:50,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1354 [2021-12-15 22:56:50,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:50,130 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 22:56:50,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 22:56:50,130 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:50,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:50,131 INFO L85 PathProgramCache]: Analyzing trace with hash 955534923, now seen corresponding path program 1 times [2021-12-15 22:56:50,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:50,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772426050] [2021-12-15 22:56:50,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:50,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:50,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3762 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 3443 trivial. 0 not checked. [2021-12-15 22:56:50,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:50,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772426050] [2021-12-15 22:56:50,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772426050] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:50,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:56:50,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:56:50,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519071453] [2021-12-15 22:56:50,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:50,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:56:50,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:50,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:56:50,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:56:50,470 INFO L87 Difference]: Start difference. First operand 9216 states and 9522 transitions. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:50,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:50,869 INFO L93 Difference]: Finished difference Result 9552 states and 9858 transitions. [2021-12-15 22:56:50,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:56:50,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 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 1353 [2021-12-15 22:56:50,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:50,880 INFO L225 Difference]: With dead ends: 9552 [2021-12-15 22:56:50,880 INFO L226 Difference]: Without dead ends: 9216 [2021-12-15 22:56:50,883 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 [2021-12-15 22:56:50,883 INFO L933 BasicCegarLoop]: 434 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:50,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 440 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 22:56:50,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9216 states. [2021-12-15 22:56:50,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9216 to 9216. [2021-12-15 22:56:50,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9216 states, 9215 states have (on average 1.0332067281606077) internal successors, (9521), 9215 states have internal predecessors, (9521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:50,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9216 states to 9216 states and 9521 transitions. [2021-12-15 22:56:50,952 INFO L78 Accepts]: Start accepts. Automaton has 9216 states and 9521 transitions. Word has length 1353 [2021-12-15 22:56:50,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:50,953 INFO L470 AbstractCegarLoop]: Abstraction has 9216 states and 9521 transitions. [2021-12-15 22:56:50,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:50,953 INFO L276 IsEmpty]: Start isEmpty. Operand 9216 states and 9521 transitions. [2021-12-15 22:56:50,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1611 [2021-12-15 22:56:50,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:50,976 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 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, 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] [2021-12-15 22:56:50,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 22:56:50,977 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:50,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:50,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1486629513, now seen corresponding path program 1 times [2021-12-15 22:56:50,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:50,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938134803] [2021-12-15 22:56:50,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:50,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4907 backedges. 3413 proven. 0 refuted. 0 times theorem prover too weak. 1494 trivial. 0 not checked. [2021-12-15 22:56:51,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:51,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938134803] [2021-12-15 22:56:51,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938134803] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:51,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:56:51,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 22:56:51,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632611388] [2021-12-15 22:56:51,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:51,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 22:56:51,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:51,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 22:56:51,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:56:51,488 INFO L87 Difference]: Start difference. First operand 9216 states and 9521 transitions. Second operand has 6 states, 6 states have (on average 129.0) internal successors, (774), 6 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:52,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:52,615 INFO L93 Difference]: Finished difference Result 18180 states and 18788 transitions. [2021-12-15 22:56:52,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 22:56:52,616 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 129.0) internal successors, (774), 6 states have internal predecessors, (774), 0 states have call successors, (0), 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 1610 [2021-12-15 22:56:52,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:52,661 INFO L225 Difference]: With dead ends: 18180 [2021-12-15 22:56:52,661 INFO L226 Difference]: Without dead ends: 9295 [2021-12-15 22:56:52,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:56:52,665 INFO L933 BasicCegarLoop]: 434 mSDtfsCounter, 515 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 1630 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:52,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 574 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1630 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-15 22:56:52,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9295 states. [2021-12-15 22:56:52,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9295 to 9216. [2021-12-15 22:56:52,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9216 states, 9215 states have (on average 1.0324470971242539) internal successors, (9514), 9215 states have internal predecessors, (9514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:52,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9216 states to 9216 states and 9514 transitions. [2021-12-15 22:56:52,725 INFO L78 Accepts]: Start accepts. Automaton has 9216 states and 9514 transitions. Word has length 1610 [2021-12-15 22:56:52,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:52,725 INFO L470 AbstractCegarLoop]: Abstraction has 9216 states and 9514 transitions. [2021-12-15 22:56:52,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 129.0) internal successors, (774), 6 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:52,726 INFO L276 IsEmpty]: Start isEmpty. Operand 9216 states and 9514 transitions. [2021-12-15 22:56:52,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1625 [2021-12-15 22:56:52,748 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:52,748 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 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, 3, 3, 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] [2021-12-15 22:56:52,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 22:56:52,749 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:52,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:52,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1131541298, now seen corresponding path program 1 times [2021-12-15 22:56:52,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:52,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574853669] [2021-12-15 22:56:52,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:52,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4755 backedges. 3298 proven. 0 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2021-12-15 22:56:53,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:53,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574853669] [2021-12-15 22:56:53,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574853669] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:53,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:56:53,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:56:53,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410936925] [2021-12-15 22:56:53,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:53,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:56:53,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:53,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:56:53,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:56:53,353 INFO L87 Difference]: Start difference. First operand 9216 states and 9514 transitions. Second operand has 4 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:54,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:54,238 INFO L93 Difference]: Finished difference Result 18123 states and 18717 transitions. [2021-12-15 22:56:54,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 22:56:54,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 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 1624 [2021-12-15 22:56:54,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:54,249 INFO L225 Difference]: With dead ends: 18123 [2021-12-15 22:56:54,250 INFO L226 Difference]: Without dead ends: 9238 [2021-12-15 22:56:54,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:56:54,256 INFO L933 BasicCegarLoop]: 433 mSDtfsCounter, 265 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:54,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 449 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1281 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 22:56:54,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9238 states. [2021-12-15 22:56:54,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9238 to 9216. [2021-12-15 22:56:54,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9216 states, 9215 states have (on average 1.0322300596852958) internal successors, (9512), 9215 states have internal predecessors, (9512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:54,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9216 states to 9216 states and 9512 transitions. [2021-12-15 22:56:54,355 INFO L78 Accepts]: Start accepts. Automaton has 9216 states and 9512 transitions. Word has length 1624 [2021-12-15 22:56:54,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:54,356 INFO L470 AbstractCegarLoop]: Abstraction has 9216 states and 9512 transitions. [2021-12-15 22:56:54,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:54,357 INFO L276 IsEmpty]: Start isEmpty. Operand 9216 states and 9512 transitions. [2021-12-15 22:56:54,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1708 [2021-12-15 22:56:54,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:54,385 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-15 22:56:54,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 22:56:54,386 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:54,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:54,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1615014304, now seen corresponding path program 1 times [2021-12-15 22:56:54,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:54,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669814089] [2021-12-15 22:56:54,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:54,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:54,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5242 backedges. 359 proven. 0 refuted. 0 times theorem prover too weak. 4883 trivial. 0 not checked. [2021-12-15 22:56:54,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:54,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669814089] [2021-12-15 22:56:54,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669814089] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:54,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:56:54,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 22:56:54,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166811392] [2021-12-15 22:56:54,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:54,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 22:56:54,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:54,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 22:56:54,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:56:54,957 INFO L87 Difference]: Start difference. First operand 9216 states and 9512 transitions. Second operand has 6 states, 6 states have (on average 63.166666666666664) internal successors, (379), 6 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:55,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:56:55,556 INFO L93 Difference]: Finished difference Result 17820 states and 18397 transitions. [2021-12-15 22:56:55,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 22:56:55,557 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 63.166666666666664) internal successors, (379), 6 states have internal predecessors, (379), 0 states have call successors, (0), 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 1707 [2021-12-15 22:56:55,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:56:55,565 INFO L225 Difference]: With dead ends: 17820 [2021-12-15 22:56:55,565 INFO L226 Difference]: Without dead ends: 8887 [2021-12-15 22:56:55,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:56:55,571 INFO L933 BasicCegarLoop]: 436 mSDtfsCounter, 43 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:56:55,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 457 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 22:56:55,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8887 states. [2021-12-15 22:56:55,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8887 to 8887. [2021-12-15 22:56:55,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8887 states, 8886 states have (on average 1.0317353139770424) internal successors, (9168), 8886 states have internal predecessors, (9168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:55,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8887 states to 8887 states and 9168 transitions. [2021-12-15 22:56:55,655 INFO L78 Accepts]: Start accepts. Automaton has 8887 states and 9168 transitions. Word has length 1707 [2021-12-15 22:56:55,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:56:55,656 INFO L470 AbstractCegarLoop]: Abstraction has 8887 states and 9168 transitions. [2021-12-15 22:56:55,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 63.166666666666664) internal successors, (379), 6 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:56:55,657 INFO L276 IsEmpty]: Start isEmpty. Operand 8887 states and 9168 transitions. [2021-12-15 22:56:55,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1774 [2021-12-15 22:56:55,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:56:55,690 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 22:56:55,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 22:56:55,690 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:56:55,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:56:55,691 INFO L85 PathProgramCache]: Analyzing trace with hash 816714569, now seen corresponding path program 1 times [2021-12-15 22:56:55,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:56:55,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948370711] [2021-12-15 22:56:55,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:55,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:56:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6450 backedges. 5014 proven. 140 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2021-12-15 22:56:56,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:56:56,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948370711] [2021-12-15 22:56:56,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948370711] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:56:56,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890711347] [2021-12-15 22:56:56,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:56:56,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:56:56,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:56:56,468 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:56:56,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 22:56:56,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:56:56,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 2078 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 22:56:56,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:56:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6450 backedges. 2549 proven. 0 refuted. 0 times theorem prover too weak. 3901 trivial. 0 not checked. [2021-12-15 22:56:59,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:56:59,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890711347] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:56:59,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:56:59,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-15 22:56:59,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125290075] [2021-12-15 22:56:59,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:56:59,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:56:59,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:56:59,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:56:59,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-15 22:56:59,915 INFO L87 Difference]: Start difference. First operand 8887 states and 9168 transitions. Second operand has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 2 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:57:00,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:57:00,629 INFO L93 Difference]: Finished difference Result 17443 states and 18003 transitions. [2021-12-15 22:57:00,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:57:00,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 2 states have internal predecessors, (505), 0 states have call successors, (0), 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 1773 [2021-12-15 22:57:00,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:57:00,637 INFO L225 Difference]: With dead ends: 17443 [2021-12-15 22:57:00,637 INFO L226 Difference]: Without dead ends: 8887 [2021-12-15 22:57:00,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1782 GetRequests, 1776 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-15 22:57:00,643 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 87 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:57:00,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 84 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:57:00,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8887 states. [2021-12-15 22:57:00,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8887 to 8887. [2021-12-15 22:57:00,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8887 states, 8886 states have (on average 1.0316227774026558) internal successors, (9167), 8886 states have internal predecessors, (9167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:57:00,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8887 states to 8887 states and 9167 transitions. [2021-12-15 22:57:00,735 INFO L78 Accepts]: Start accepts. Automaton has 8887 states and 9167 transitions. Word has length 1773 [2021-12-15 22:57:00,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:57:00,735 INFO L470 AbstractCegarLoop]: Abstraction has 8887 states and 9167 transitions. [2021-12-15 22:57:00,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 2 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:57:00,736 INFO L276 IsEmpty]: Start isEmpty. Operand 8887 states and 9167 transitions. [2021-12-15 22:57:00,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1804 [2021-12-15 22:57:00,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:57:00,760 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 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, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:57:00,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 22:57:00,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-15 22:57:00,967 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:57:00,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:57:00,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1508557206, now seen corresponding path program 1 times [2021-12-15 22:57:00,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:57:00,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117198489] [2021-12-15 22:57:00,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:57:00,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:57:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:57:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 2622 proven. 156 refuted. 0 times theorem prover too weak. 4607 trivial. 0 not checked. [2021-12-15 22:57:01,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:57:01,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117198489] [2021-12-15 22:57:01,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117198489] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:57:01,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332432902] [2021-12-15 22:57:01,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:57:01,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:57:01,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:57:01,419 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:57:01,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 22:57:01,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:57:01,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 2132 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 22:57:01,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:57:04,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 2778 proven. 0 refuted. 0 times theorem prover too weak. 4607 trivial. 0 not checked. [2021-12-15 22:57:04,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:57:04,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332432902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:57:04,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:57:04,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-15 22:57:04,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526320530] [2021-12-15 22:57:04,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:57:04,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:57:04,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:57:04,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:57:04,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:57:04,431 INFO L87 Difference]: Start difference. First operand 8887 states and 9167 transitions. Second operand has 3 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:57:05,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:57:05,217 INFO L93 Difference]: Finished difference Result 19417 states and 20042 transitions. [2021-12-15 22:57:05,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:57:05,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 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 1803 [2021-12-15 22:57:05,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:57:05,225 INFO L225 Difference]: With dead ends: 19417 [2021-12-15 22:57:05,225 INFO L226 Difference]: Without dead ends: 10861 [2021-12-15 22:57:05,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1807 GetRequests, 1802 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:57:05,234 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 173 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:57:05,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 95 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:57:05,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10861 states. [2021-12-15 22:57:05,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10861 to 10532. [2021-12-15 22:57:05,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10532 states, 10531 states have (on average 1.0288671541164183) internal successors, (10835), 10531 states have internal predecessors, (10835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:57:05,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10532 states to 10532 states and 10835 transitions. [2021-12-15 22:57:05,309 INFO L78 Accepts]: Start accepts. Automaton has 10532 states and 10835 transitions. Word has length 1803 [2021-12-15 22:57:05,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:57:05,309 INFO L470 AbstractCegarLoop]: Abstraction has 10532 states and 10835 transitions. [2021-12-15 22:57:05,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:57:05,310 INFO L276 IsEmpty]: Start isEmpty. Operand 10532 states and 10835 transitions. [2021-12-15 22:57:05,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1912 [2021-12-15 22:57:05,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:57:05,337 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:57:05,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 22:57:05,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:57:05,556 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:57:05,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:57:05,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1977995090, now seen corresponding path program 1 times [2021-12-15 22:57:05,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:57:05,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512301611] [2021-12-15 22:57:05,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:57:05,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:57:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:57:06,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 4051 proven. 1509 refuted. 0 times theorem prover too weak. 1755 trivial. 0 not checked. [2021-12-15 22:57:06,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:57:06,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512301611] [2021-12-15 22:57:06,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512301611] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:57:06,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981381384] [2021-12-15 22:57:06,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:57:06,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:57:06,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:57:06,315 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:57:06,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 22:57:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:57:06,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 2248 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 22:57:06,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:57:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 4048 proven. 0 refuted. 0 times theorem prover too weak. 3267 trivial. 0 not checked. [2021-12-15 22:57:08,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:57:08,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981381384] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:57:08,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:57:08,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-15 22:57:08,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28169108] [2021-12-15 22:57:08,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:57:08,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:57:08,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:57:08,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:57:08,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:57:08,788 INFO L87 Difference]: Start difference. First operand 10532 states and 10835 transitions. Second operand has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:57:09,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:57:09,453 INFO L93 Difference]: Finished difference Result 21720 states and 22341 transitions. [2021-12-15 22:57:09,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:57:09,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 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 1911 [2021-12-15 22:57:09,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:57:09,463 INFO L225 Difference]: With dead ends: 21720 [2021-12-15 22:57:09,463 INFO L226 Difference]: Without dead ends: 11190 [2021-12-15 22:57:09,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1917 GetRequests, 1913 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 22:57:09,468 INFO L933 BasicCegarLoop]: 431 mSDtfsCounter, 263 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:57:09,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 437 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 22:57:09,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11190 states. [2021-12-15 22:57:09,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11190 to 11190. [2021-12-15 22:57:09,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11190 states, 11189 states have (on average 1.0275270354812762) internal successors, (11497), 11189 states have internal predecessors, (11497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:57:09,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11190 states to 11190 states and 11497 transitions. [2021-12-15 22:57:09,560 INFO L78 Accepts]: Start accepts. Automaton has 11190 states and 11497 transitions. Word has length 1911 [2021-12-15 22:57:09,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:57:09,561 INFO L470 AbstractCegarLoop]: Abstraction has 11190 states and 11497 transitions. [2021-12-15 22:57:09,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:57:09,561 INFO L276 IsEmpty]: Start isEmpty. Operand 11190 states and 11497 transitions. [2021-12-15 22:57:09,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1996 [2021-12-15 22:57:09,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:57:09,599 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:57:09,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 22:57:09,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:57:09,802 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:57:09,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:57:09,802 INFO L85 PathProgramCache]: Analyzing trace with hash 2118691385, now seen corresponding path program 1 times [2021-12-15 22:57:09,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:57:09,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114220258] [2021-12-15 22:57:09,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:57:09,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:57:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:57:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8459 backedges. 3862 proven. 272 refuted. 0 times theorem prover too weak. 4325 trivial. 0 not checked. [2021-12-15 22:57:10,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:57:10,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114220258] [2021-12-15 22:57:10,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114220258] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:57:10,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689070668] [2021-12-15 22:57:10,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:57:10,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:57:10,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:57:10,386 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:57:10,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 22:57:10,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:57:10,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 2342 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 22:57:10,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:57:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8459 backedges. 4846 proven. 0 refuted. 0 times theorem prover too weak. 3613 trivial. 0 not checked. [2021-12-15 22:57:13,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:57:13,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689070668] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:57:13,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:57:13,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-15 22:57:13,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767463919] [2021-12-15 22:57:13,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:57:13,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:57:13,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:57:13,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:57:13,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-15 22:57:13,119 INFO L87 Difference]: Start difference. First operand 11190 states and 11497 transitions. Second operand has 3 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:57:14,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:57:14,008 INFO L93 Difference]: Finished difference Result 26326 states and 27094 transitions. [2021-12-15 22:57:14,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:57:14,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 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 1995 [2021-12-15 22:57:14,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:57:14,021 INFO L225 Difference]: With dead ends: 26326 [2021-12-15 22:57:14,021 INFO L226 Difference]: Without dead ends: 15138 [2021-12-15 22:57:14,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2003 GetRequests, 1997 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-15 22:57:14,029 INFO L933 BasicCegarLoop]: 427 mSDtfsCounter, 221 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:57:14,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 433 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 22:57:14,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15138 states. [2021-12-15 22:57:14,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15138 to 15138. [2021-12-15 22:57:14,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15138 states, 15137 states have (on average 1.0260289357204202) internal successors, (15531), 15137 states have internal predecessors, (15531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:57:14,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15138 states to 15138 states and 15531 transitions. [2021-12-15 22:57:14,144 INFO L78 Accepts]: Start accepts. Automaton has 15138 states and 15531 transitions. Word has length 1995 [2021-12-15 22:57:14,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:57:14,145 INFO L470 AbstractCegarLoop]: Abstraction has 15138 states and 15531 transitions. [2021-12-15 22:57:14,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:57:14,145 INFO L276 IsEmpty]: Start isEmpty. Operand 15138 states and 15531 transitions. [2021-12-15 22:57:14,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2089 [2021-12-15 22:57:14,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:57:14,179 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:57:14,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-15 22:57:14,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:57:14,398 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:57:14,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:57:14,398 INFO L85 PathProgramCache]: Analyzing trace with hash -792731749, now seen corresponding path program 1 times [2021-12-15 22:57:14,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:57:14,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17192561] [2021-12-15 22:57:14,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:57:14,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:57:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:57:15,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9092 backedges. 4136 proven. 523 refuted. 0 times theorem prover too weak. 4433 trivial. 0 not checked. [2021-12-15 22:57:15,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:57:15,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17192561] [2021-12-15 22:57:15,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17192561] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:57:15,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861649943] [2021-12-15 22:57:15,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:57:15,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:57:15,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:57:15,076 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:57:15,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 22:57:15,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:57:15,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 2435 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 22:57:15,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:57:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9092 backedges. 479 proven. 0 refuted. 0 times theorem prover too weak. 8613 trivial. 0 not checked. [2021-12-15 22:57:18,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:57:18,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861649943] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:57:18,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:57:18,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-15 22:57:18,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042511807] [2021-12-15 22:57:18,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:57:18,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:57:18,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:57:18,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:57:18,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-15 22:57:18,622 INFO L87 Difference]: Start difference. First operand 15138 states and 15531 transitions. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:57:18,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:57:18,654 INFO L93 Difference]: Finished difference Result 15180 states and 15573 transitions. [2021-12-15 22:57:18,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:57:18,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 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 2088 [2021-12-15 22:57:18,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:57:18,667 INFO L225 Difference]: With dead ends: 15180 [2021-12-15 22:57:18,667 INFO L226 Difference]: Without dead ends: 15178 [2021-12-15 22:57:18,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2096 GetRequests, 2090 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-15 22:57:18,673 INFO L933 BasicCegarLoop]: 431 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 458 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 22:57:18,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 437 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 458 Unchecked, 0.0s Time] [2021-12-15 22:57:18,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15178 states. [2021-12-15 22:57:18,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15178 to 15178. [2021-12-15 22:57:18,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15178 states, 15177 states have (on average 1.025960334717006) internal successors, (15571), 15177 states have internal predecessors, (15571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:57:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15178 states to 15178 states and 15571 transitions. [2021-12-15 22:57:18,788 INFO L78 Accepts]: Start accepts. Automaton has 15178 states and 15571 transitions. Word has length 2088 [2021-12-15 22:57:18,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:57:18,789 INFO L470 AbstractCegarLoop]: Abstraction has 15178 states and 15571 transitions. [2021-12-15 22:57:18,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:57:18,790 INFO L276 IsEmpty]: Start isEmpty. Operand 15178 states and 15571 transitions. [2021-12-15 22:57:18,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2418 [2021-12-15 22:57:18,831 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:57:18,832 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:57:18,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 22:57:19,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-15 22:57:19,047 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:57:19,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:57:19,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1539848652, now seen corresponding path program 1 times [2021-12-15 22:57:19,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:57:19,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671789606] [2021-12-15 22:57:19,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:57:19,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:57:19,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:57:20,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11177 backedges. 4034 proven. 0 refuted. 0 times theorem prover too weak. 7143 trivial. 0 not checked. [2021-12-15 22:57:20,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:57:20,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671789606] [2021-12-15 22:57:20,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671789606] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:57:20,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:57:20,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 22:57:20,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162952365] [2021-12-15 22:57:20,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:57:20,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 22:57:20,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:57:20,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 22:57:20,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:57:20,025 INFO L87 Difference]: Start difference. First operand 15178 states and 15571 transitions. Second operand has 7 states, 7 states have (on average 115.28571428571429) internal successors, (807), 7 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:57:21,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:57:21,315 INFO L93 Difference]: Finished difference Result 30039 states and 30825 transitions. [2021-12-15 22:57:21,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 22:57:21,316 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 115.28571428571429) internal successors, (807), 7 states have internal predecessors, (807), 0 states have call successors, (0), 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 2417 [2021-12-15 22:57:21,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:57:21,318 INFO L225 Difference]: With dead ends: 30039 [2021-12-15 22:57:21,318 INFO L226 Difference]: Without dead ends: 0 [2021-12-15 22:57:21,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:57:21,331 INFO L933 BasicCegarLoop]: 415 mSDtfsCounter, 252 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 2354 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 2411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:57:21,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 441 Invalid, 2411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2354 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 22:57:21,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-15 22:57:21,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-15 22:57:21,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:57:21,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-15 22:57:21,332 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 2417 [2021-12-15 22:57:21,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:57:21,333 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-15 22:57:21,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 115.28571428571429) internal successors, (807), 7 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:57:21,333 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-15 22:57:21,333 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-15 22:57:21,337 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-15 22:57:21,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-15 22:57:21,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.