./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/half_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/half_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa --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 0b362a98d328467ff4a069dbed2be3429090ca070e60d49c76297e4bb94402b7 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:09:34,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:09:34,364 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:09:34,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:09:34,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:09:34,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:09:34,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:09:34,392 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:09:34,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:09:34,394 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:09:34,395 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:09:34,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:09:34,397 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:09:34,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:09:34,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:09:34,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:09:34,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:09:34,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:09:34,403 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:09:34,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:09:34,407 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:09:34,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:09:34,410 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:09:34,411 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:09:34,415 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:09:34,415 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:09:34,416 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:09:34,417 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:09:34,417 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:09:34,419 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:09:34,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:09:34,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:09:34,421 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:09:34,422 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:09:34,423 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:09:34,423 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:09:34,424 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:09:34,424 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:09:34,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:09:34,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:09:34,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:09:34,427 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 20:09:34,452 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:09:34,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:09:34,453 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:09:34,453 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:09:34,454 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:09:34,454 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:09:34,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:09:34,455 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:09:34,455 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:09:34,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:09:34,455 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:09:34,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 20:09:34,456 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:09:34,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:09:34,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 20:09:34,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:09:34,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 20:09:34,457 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:09:34,457 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 20:09:34,457 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:09:34,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 20:09:34,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:09:34,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:09:34,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:09:34,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:09:34,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:09:34,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:09:34,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 20:09:34,465 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 20:09:34,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 20:09:34,465 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 20:09:34,465 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 20:09:34,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 20:09:34,465 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:09:34,466 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b362a98d328467ff4a069dbed2be3429090ca070e60d49c76297e4bb94402b7 [2021-12-06 20:09:34,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:09:34,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:09:34,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:09:34,663 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:09:34,663 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:09:34,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/loop-invgen/half_2.i [2021-12-06 20:09:34,705 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/data/c608f78c7/99c02d7be2bf475a8f159ad1d392921c/FLAGd10a60298 [2021-12-06 20:09:35,073 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:09:35,074 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/sv-benchmarks/c/loop-invgen/half_2.i [2021-12-06 20:09:35,078 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/data/c608f78c7/99c02d7be2bf475a8f159ad1d392921c/FLAGd10a60298 [2021-12-06 20:09:35,088 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/data/c608f78c7/99c02d7be2bf475a8f159ad1d392921c [2021-12-06 20:09:35,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:09:35,091 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:09:35,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:09:35,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:09:35,094 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:09:35,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:09:35" (1/1) ... [2021-12-06 20:09:35,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21092661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:09:35, skipping insertion in model container [2021-12-06 20:09:35,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:09:35" (1/1) ... [2021-12-06 20:09:35,102 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:09:35,113 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:09:35,232 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/sv-benchmarks/c/loop-invgen/half_2.i[893,906] [2021-12-06 20:09:35,239 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:09:35,245 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:09:35,254 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/sv-benchmarks/c/loop-invgen/half_2.i[893,906] [2021-12-06 20:09:35,256 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:09:35,266 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:09:35,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:09:35 WrapperNode [2021-12-06 20:09:35,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:09:35,267 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:09:35,267 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:09:35,267 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:09:35,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:09:35" (1/1) ... [2021-12-06 20:09:35,281 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:09:35" (1/1) ... [2021-12-06 20:09:35,298 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2021-12-06 20:09:35,298 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:09:35,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:09:35,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:09:35,299 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:09:35,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:09:35" (1/1) ... [2021-12-06 20:09:35,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:09:35" (1/1) ... [2021-12-06 20:09:35,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:09:35" (1/1) ... [2021-12-06 20:09:35,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:09:35" (1/1) ... [2021-12-06 20:09:35,311 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:09:35" (1/1) ... [2021-12-06 20:09:35,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:09:35" (1/1) ... [2021-12-06 20:09:35,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:09:35" (1/1) ... [2021-12-06 20:09:35,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:09:35,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:09:35,316 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:09:35,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:09:35,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:09:35" (1/1) ... [2021-12-06 20:09:35,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:09:35,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:09:35,342 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 20:09:35,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 20:09:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 20:09:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 20:09:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:09:35,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:09:35,413 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:09:35,414 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:09:35,484 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:09:35,488 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:09:35,488 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 20:09:35,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:09:35 BoogieIcfgContainer [2021-12-06 20:09:35,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:09:35,491 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 20:09:35,491 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 20:09:35,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 20:09:35,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:09:35" (1/3) ... [2021-12-06 20:09:35,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f2edcb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:09:35, skipping insertion in model container [2021-12-06 20:09:35,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:09:35" (2/3) ... [2021-12-06 20:09:35,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f2edcb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:09:35, skipping insertion in model container [2021-12-06 20:09:35,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:09:35" (3/3) ... [2021-12-06 20:09:35,496 INFO L111 eAbstractionObserver]: Analyzing ICFG half_2.i [2021-12-06 20:09:35,500 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 20:09:35,500 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 20:09:35,551 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 20:09:35,556 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 [2021-12-06 20:09:35,557 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 20:09:35,568 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:35,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 20:09:35,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:09:35,572 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:09:35,573 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:09:35,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:09:35,577 INFO L85 PathProgramCache]: Analyzing trace with hash 185205049, now seen corresponding path program 1 times [2021-12-06 20:09:35,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:09:35,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174229624] [2021-12-06 20:09:35,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:09:35,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:09:35,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:09:35,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:35,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:09:35,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174229624] [2021-12-06 20:09:35,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174229624] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:09:35,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:09:35,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:09:35,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440244812] [2021-12-06 20:09:35,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:09:35,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 20:09:35,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:09:35,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 20:09:35,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 20:09:35,726 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:35,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:09:35,739 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2021-12-06 20:09:35,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 20:09:35,741 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-06 20:09:35,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:09:35,749 INFO L225 Difference]: With dead ends: 24 [2021-12-06 20:09:35,749 INFO L226 Difference]: Without dead ends: 10 [2021-12-06 20:09:35,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 20:09:35,756 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:09:35,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:09:35,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-12-06 20:09:35,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-12-06 20:09:35,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:35,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-12-06 20:09:35,785 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2021-12-06 20:09:35,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:09:35,785 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-12-06 20:09:35,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:35,786 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-12-06 20:09:35,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 20:09:35,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:09:35,786 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:09:35,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 20:09:35,786 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:09:35,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:09:35,787 INFO L85 PathProgramCache]: Analyzing trace with hash 181510965, now seen corresponding path program 1 times [2021-12-06 20:09:35,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:09:35,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027176293] [2021-12-06 20:09:35,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:09:35,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:09:35,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:09:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:35,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:09:35,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027176293] [2021-12-06 20:09:35,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027176293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:09:35,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:09:35,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:09:35,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478313437] [2021-12-06 20:09:35,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:09:35,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:09:35,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:09:35,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:09:35,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:09:35,869 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:35,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:09:35,902 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-12-06 20:09:35,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:09:35,902 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-06 20:09:35,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:09:35,903 INFO L225 Difference]: With dead ends: 18 [2021-12-06 20:09:35,903 INFO L226 Difference]: Without dead ends: 16 [2021-12-06 20:09:35,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:09:35,906 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:09:35,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 17 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:09:35,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-06 20:09:35,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2021-12-06 20:09:35,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:35,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-12-06 20:09:35,912 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2021-12-06 20:09:35,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:09:35,912 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-12-06 20:09:35,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:35,912 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-12-06 20:09:35,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 20:09:35,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:09:35,913 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:09:35,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 20:09:35,914 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:09:35,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:09:35,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1383318765, now seen corresponding path program 1 times [2021-12-06 20:09:35,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:09:35,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279488217] [2021-12-06 20:09:35,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:09:35,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:09:35,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:09:36,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:36,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:09:36,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279488217] [2021-12-06 20:09:36,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279488217] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:09:36,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527726418] [2021-12-06 20:09:36,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:09:36,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:09:36,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:09:36,009 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:09:36,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 20:09:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:09:36,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 20:09:36,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:09:36,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:36,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:09:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:36,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527726418] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:09:36,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:09:36,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-12-06 20:09:36,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166952639] [2021-12-06 20:09:36,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:09:36,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 20:09:36,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:09:36,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 20:09:36,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-06 20:09:36,364 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:36,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:09:36,616 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-12-06 20:09:36,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 20:09:36,616 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 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 9 [2021-12-06 20:09:36,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:09:36,617 INFO L225 Difference]: With dead ends: 41 [2021-12-06 20:09:36,617 INFO L226 Difference]: Without dead ends: 39 [2021-12-06 20:09:36,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-12-06 20:09:36,618 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:09:36,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 56 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:09:36,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-06 20:09:36,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 20. [2021-12-06 20:09:36,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:36,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-12-06 20:09:36,623 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 9 [2021-12-06 20:09:36,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:09:36,624 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-12-06 20:09:36,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:36,624 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-12-06 20:09:36,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 20:09:36,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:09:36,624 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:09:36,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 20:09:36,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:09:36,826 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:09:36,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:09:36,829 INFO L85 PathProgramCache]: Analyzing trace with hash -424251923, now seen corresponding path program 2 times [2021-12-06 20:09:36,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:09:36,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092783341] [2021-12-06 20:09:36,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:09:36,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:09:36,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:09:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:36,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:09:36,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092783341] [2021-12-06 20:09:36,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092783341] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:09:36,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114611629] [2021-12-06 20:09:36,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:09:36,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:09:36,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:09:36,992 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:09:36,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 20:09:37,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:09:37,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:09:37,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 20:09:37,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:09:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:37,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:09:37,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:37,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114611629] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:09:37,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:09:37,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2021-12-06 20:09:37,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413060328] [2021-12-06 20:09:37,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:09:37,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 20:09:37,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:09:37,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 20:09:37,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-12-06 20:09:37,139 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:37,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:09:37,325 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2021-12-06 20:09:37,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 20:09:37,325 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 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 11 [2021-12-06 20:09:37,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:09:37,326 INFO L225 Difference]: With dead ends: 51 [2021-12-06 20:09:37,326 INFO L226 Difference]: Without dead ends: 49 [2021-12-06 20:09:37,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2021-12-06 20:09:37,328 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 55 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:09:37,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 85 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:09:37,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-06 20:09:37,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 19. [2021-12-06 20:09:37,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:37,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-12-06 20:09:37,336 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2021-12-06 20:09:37,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:09:37,337 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-12-06 20:09:37,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:37,337 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-12-06 20:09:37,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 20:09:37,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:09:37,338 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:09:37,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 20:09:37,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:09:37,540 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:09:37,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:09:37,541 INFO L85 PathProgramCache]: Analyzing trace with hash 34157897, now seen corresponding path program 1 times [2021-12-06 20:09:37,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:09:37,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158108796] [2021-12-06 20:09:37,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:09:37,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:09:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:09:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:37,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:09:37,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158108796] [2021-12-06 20:09:37,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158108796] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:09:37,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886094468] [2021-12-06 20:09:37,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:09:37,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:09:37,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:09:37,635 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:09:37,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 20:09:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:09:37,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 20:09:37,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:09:37,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:37,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:09:37,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886094468] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:09:37,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:09:37,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-12-06 20:09:37,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781833879] [2021-12-06 20:09:37,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:09:37,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:09:37,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:09:37,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:09:37,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-06 20:09:37,694 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:37,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:09:37,718 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-12-06 20:09:37,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:09:37,719 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-12-06 20:09:37,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:09:37,719 INFO L225 Difference]: With dead ends: 27 [2021-12-06 20:09:37,719 INFO L226 Difference]: Without dead ends: 19 [2021-12-06 20:09:37,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-06 20:09:37,721 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:09:37,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 24 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:09:37,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-06 20:09:37,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-12-06 20:09:37,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:37,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-12-06 20:09:37,727 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2021-12-06 20:09:37,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:09:37,727 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-12-06 20:09:37,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:37,727 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-12-06 20:09:37,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 20:09:37,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:09:37,728 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:09:37,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 20:09:37,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:09:37,930 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:09:37,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:09:37,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1874485687, now seen corresponding path program 1 times [2021-12-06 20:09:37,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:09:37,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696127984] [2021-12-06 20:09:37,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:09:37,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:09:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:09:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:38,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:09:38,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696127984] [2021-12-06 20:09:38,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696127984] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:09:38,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029613810] [2021-12-06 20:09:38,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:09:38,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:09:38,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:09:38,094 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:09:38,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 20:09:38,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:09:38,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 20:09:38,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:09:38,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:38,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:09:38,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:38,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029613810] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:09:38,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:09:38,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2021-12-06 20:09:38,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141080652] [2021-12-06 20:09:38,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:09:38,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 20:09:38,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:09:38,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 20:09:38,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-12-06 20:09:38,428 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:38,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:09:38,803 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-12-06 20:09:38,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 20:09:38,804 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 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 13 [2021-12-06 20:09:38,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:09:38,804 INFO L225 Difference]: With dead ends: 47 [2021-12-06 20:09:38,804 INFO L226 Difference]: Without dead ends: 28 [2021-12-06 20:09:38,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=882, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 20:09:38,806 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 66 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:09:38,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 42 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:09:38,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-06 20:09:38,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2021-12-06 20:09:38,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:38,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-12-06 20:09:38,810 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2021-12-06 20:09:38,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:09:38,810 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-12-06 20:09:38,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:38,810 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-12-06 20:09:38,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 20:09:38,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:09:38,811 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:09:38,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 20:09:39,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 20:09:39,013 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:09:39,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:09:39,014 INFO L85 PathProgramCache]: Analyzing trace with hash -17212563, now seen corresponding path program 2 times [2021-12-06 20:09:39,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:09:39,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624811662] [2021-12-06 20:09:39,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:09:39,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:09:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:09:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:39,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:09:39,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624811662] [2021-12-06 20:09:39,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624811662] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:09:39,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067419706] [2021-12-06 20:09:39,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:09:39,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:09:39,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:09:39,220 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:09:39,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 20:09:39,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:09:39,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:09:39,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 20:09:39,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:09:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:39,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:09:39,619 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:39,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067419706] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:09:39,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:09:39,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2021-12-06 20:09:39,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687555611] [2021-12-06 20:09:39,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:09:39,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 20:09:39,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:09:39,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 20:09:39,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-12-06 20:09:39,621 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:40,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:09:40,069 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-12-06 20:09:40,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 20:09:40,070 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 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 17 [2021-12-06 20:09:40,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:09:40,071 INFO L225 Difference]: With dead ends: 49 [2021-12-06 20:09:40,071 INFO L226 Difference]: Without dead ends: 34 [2021-12-06 20:09:40,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=297, Invalid=1343, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 20:09:40,072 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 61 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:09:40,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 55 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:09:40,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-06 20:09:40,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2021-12-06 20:09:40,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:40,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-12-06 20:09:40,080 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2021-12-06 20:09:40,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:09:40,080 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-12-06 20:09:40,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:40,080 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-12-06 20:09:40,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 20:09:40,084 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:09:40,084 INFO L514 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:09:40,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 20:09:40,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:09:40,285 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:09:40,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:09:40,288 INFO L85 PathProgramCache]: Analyzing trace with hash 38169965, now seen corresponding path program 3 times [2021-12-06 20:09:40,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:09:40,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190565751] [2021-12-06 20:09:40,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:09:40,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:09:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:09:40,405 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:40,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:09:40,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190565751] [2021-12-06 20:09:40,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190565751] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:09:40,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606791280] [2021-12-06 20:09:40,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:09:40,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:09:40,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:09:40,407 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:09:40,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 20:09:40,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 20:09:40,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:09:40,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 20:09:40,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:09:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:40,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:09:40,650 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:40,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606791280] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:09:40,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:09:40,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2021-12-06 20:09:40,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121596964] [2021-12-06 20:09:40,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:09:40,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 20:09:40,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:09:40,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 20:09:40,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2021-12-06 20:09:40,652 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:40,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:09:40,994 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2021-12-06 20:09:40,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 20:09:40,994 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 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 21 [2021-12-06 20:09:40,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:09:40,995 INFO L225 Difference]: With dead ends: 82 [2021-12-06 20:09:40,995 INFO L226 Difference]: Without dead ends: 80 [2021-12-06 20:09:40,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=750, Invalid=2220, Unknown=0, NotChecked=0, Total=2970 [2021-12-06 20:09:40,996 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 103 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:09:40,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 105 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:09:40,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-06 20:09:41,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 37. [2021-12-06 20:09:41,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:41,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-12-06 20:09:41,005 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 21 [2021-12-06 20:09:41,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:09:41,005 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-12-06 20:09:41,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:41,005 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-12-06 20:09:41,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 20:09:41,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:09:41,006 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:09:41,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 20:09:41,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:09:41,207 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:09:41,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:09:41,208 INFO L85 PathProgramCache]: Analyzing trace with hash -756727863, now seen corresponding path program 4 times [2021-12-06 20:09:41,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:09:41,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402167917] [2021-12-06 20:09:41,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:09:41,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:09:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:09:41,370 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:41,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:09:41,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402167917] [2021-12-06 20:09:41,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402167917] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:09:41,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707551174] [2021-12-06 20:09:41,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:09:41,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:09:41,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:09:41,371 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:09:41,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 20:09:41,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:09:41,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:09:41,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 20:09:41,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:09:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:41,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:09:41,810 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:41,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707551174] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:09:41,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:09:41,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2021-12-06 20:09:41,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177825132] [2021-12-06 20:09:41,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:09:41,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 20:09:41,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:09:41,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 20:09:41,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-12-06 20:09:41,812 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:42,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:09:42,422 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2021-12-06 20:09:42,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 20:09:42,423 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 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 21 [2021-12-06 20:09:42,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:09:42,423 INFO L225 Difference]: With dead ends: 96 [2021-12-06 20:09:42,423 INFO L226 Difference]: Without dead ends: 78 [2021-12-06 20:09:42,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=415, Invalid=2035, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 20:09:42,425 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 75 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:09:42,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 69 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:09:42,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-06 20:09:42,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 36. [2021-12-06 20:09:42,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:42,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-12-06 20:09:42,433 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 21 [2021-12-06 20:09:42,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:09:42,433 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-12-06 20:09:42,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:42,433 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-12-06 20:09:42,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 20:09:42,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:09:42,434 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:09:42,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 20:09:42,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:09:42,636 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:09:42,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:09:42,637 INFO L85 PathProgramCache]: Analyzing trace with hash -946138643, now seen corresponding path program 5 times [2021-12-06 20:09:42,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:09:42,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983517114] [2021-12-06 20:09:42,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:09:42,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:09:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:09:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:42,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:09:42,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983517114] [2021-12-06 20:09:42,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983517114] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:09:42,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879457322] [2021-12-06 20:09:42,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:09:42,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:09:42,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:09:42,826 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:09:42,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 20:09:42,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-06 20:09:42,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:09:42,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 20:09:42,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:09:43,019 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:43,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:09:43,405 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:43,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879457322] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:09:43,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:09:43,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 33 [2021-12-06 20:09:43,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123281144] [2021-12-06 20:09:43,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:09:43,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 20:09:43,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:09:43,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 20:09:43,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 20:09:43,407 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:44,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:09:44,169 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2021-12-06 20:09:44,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 20:09:44,169 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 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 25 [2021-12-06 20:09:44,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:09:44,171 INFO L225 Difference]: With dead ends: 93 [2021-12-06 20:09:44,171 INFO L226 Difference]: Without dead ends: 72 [2021-12-06 20:09:44,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=554, Invalid=2868, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 20:09:44,172 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 98 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:09:44,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 76 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:09:44,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-06 20:09:44,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 35. [2021-12-06 20:09:44,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:44,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-12-06 20:09:44,181 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 25 [2021-12-06 20:09:44,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:09:44,181 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-12-06 20:09:44,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:44,181 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-12-06 20:09:44,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 20:09:44,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:09:44,182 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:09:44,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 20:09:44,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:09:44,383 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:09:44,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:09:44,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1059897673, now seen corresponding path program 6 times [2021-12-06 20:09:44,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:09:44,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446580673] [2021-12-06 20:09:44,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:09:44,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:09:44,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:09:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:44,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:09:44,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446580673] [2021-12-06 20:09:44,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446580673] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:09:44,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929984877] [2021-12-06 20:09:44,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:09:44,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:09:44,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:09:44,623 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:09:44,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 20:09:44,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-06 20:09:44,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:09:44,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 20:09:44,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:09:44,944 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:44,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:09:45,457 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:45,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929984877] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:09:45,457 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:09:45,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 44 [2021-12-06 20:09:45,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257613964] [2021-12-06 20:09:45,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:09:45,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 20:09:45,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:09:45,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 20:09:45,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1632, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 20:09:45,459 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:46,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:09:46,037 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-12-06 20:09:46,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 20:09:46,038 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 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 29 [2021-12-06 20:09:46,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:09:46,038 INFO L225 Difference]: With dead ends: 60 [2021-12-06 20:09:46,038 INFO L226 Difference]: Without dead ends: 36 [2021-12-06 20:09:46,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=493, Invalid=3167, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 20:09:46,040 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 38 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:09:46,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 72 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:09:46,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-06 20:09:46,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2021-12-06 20:09:46,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:46,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-12-06 20:09:46,048 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2021-12-06 20:09:46,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:09:46,048 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-12-06 20:09:46,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:46,048 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-12-06 20:09:46,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 20:09:46,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:09:46,049 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:09:46,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 20:09:46,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 20:09:46,250 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:09:46,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:09:46,251 INFO L85 PathProgramCache]: Analyzing trace with hash -138352531, now seen corresponding path program 7 times [2021-12-06 20:09:46,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:09:46,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512924457] [2021-12-06 20:09:46,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:09:46,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:09:46,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:09:46,537 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 35 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:46,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:09:46,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512924457] [2021-12-06 20:09:46,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512924457] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:09:46,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834474732] [2021-12-06 20:09:46,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:09:46,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:09:46,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:09:46,538 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:09:46,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 20:09:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:09:46,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 20:09:46,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:09:46,821 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:46,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:09:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:47,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834474732] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:09:47,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:09:47,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 43 [2021-12-06 20:09:47,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822458723] [2021-12-06 20:09:47,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:09:47,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-06 20:09:47,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:09:47,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-06 20:09:47,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 20:09:47,406 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:48,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:09:48,715 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2021-12-06 20:09:48,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-06 20:09:48,716 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 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 33 [2021-12-06 20:09:48,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:09:48,716 INFO L225 Difference]: With dead ends: 93 [2021-12-06 20:09:48,716 INFO L226 Difference]: Without dead ends: 66 [2021-12-06 20:09:48,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=895, Invalid=4957, Unknown=0, NotChecked=0, Total=5852 [2021-12-06 20:09:48,719 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 139 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:09:48,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 118 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:09:48,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-06 20:09:48,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2021-12-06 20:09:48,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:48,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-12-06 20:09:48,730 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 33 [2021-12-06 20:09:48,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:09:48,731 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-12-06 20:09:48,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:48,731 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-12-06 20:09:48,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 20:09:48,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:09:48,732 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:09:48,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-06 20:09:48,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:09:48,934 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:09:48,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:09:48,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1196154167, now seen corresponding path program 8 times [2021-12-06 20:09:48,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:09:48,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479773967] [2021-12-06 20:09:48,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:09:48,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:09:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:09:49,260 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:49,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:09:49,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479773967] [2021-12-06 20:09:49,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479773967] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:09:49,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30518794] [2021-12-06 20:09:49,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:09:49,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:09:49,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:09:49,261 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:09:49,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 20:09:49,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:09:49,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:09:49,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-06 20:09:49,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:09:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:49,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:09:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:50,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30518794] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:09:50,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:09:50,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 48 [2021-12-06 20:09:50,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687800227] [2021-12-06 20:09:50,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:09:50,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 20:09:50,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:09:50,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 20:09:50,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 20:09:50,280 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:51,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:09:51,906 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2021-12-06 20:09:51,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-06 20:09:51,907 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 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 37 [2021-12-06 20:09:51,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:09:51,907 INFO L225 Difference]: With dead ends: 124 [2021-12-06 20:09:51,908 INFO L226 Difference]: Without dead ends: 94 [2021-12-06 20:09:51,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1841 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1097, Invalid=6213, Unknown=0, NotChecked=0, Total=7310 [2021-12-06 20:09:51,910 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 169 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:09:51,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 131 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:09:51,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-06 20:09:51,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 72. [2021-12-06 20:09:51,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:51,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2021-12-06 20:09:51,932 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 37 [2021-12-06 20:09:51,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:09:51,932 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2021-12-06 20:09:51,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:51,932 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2021-12-06 20:09:51,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 20:09:51,933 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:09:51,933 INFO L514 BasicCegarLoop]: trace histogram [15, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:09:51,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 20:09:52,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 20:09:52,134 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:09:52,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:09:52,134 INFO L85 PathProgramCache]: Analyzing trace with hash -826667923, now seen corresponding path program 9 times [2021-12-06 20:09:52,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:09:52,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96518018] [2021-12-06 20:09:52,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:09:52,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:09:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:09:52,331 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 91 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:52,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:09:52,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96518018] [2021-12-06 20:09:52,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96518018] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:09:52,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549892906] [2021-12-06 20:09:52,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:09:52,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:09:52,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:09:52,333 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:09:52,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 20:09:52,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-06 20:09:52,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:09:52,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 20:09:52,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:09:52,673 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:52,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:09:52,973 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:52,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549892906] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:09:52,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:09:52,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 63 [2021-12-06 20:09:52,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430611936] [2021-12-06 20:09:52,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:09:52,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-06 20:09:52,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:09:52,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-06 20:09:52,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=834, Invalid=3072, Unknown=0, NotChecked=0, Total=3906 [2021-12-06 20:09:52,976 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 63 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 63 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:53,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:09:53,968 INFO L93 Difference]: Finished difference Result 266 states and 288 transitions. [2021-12-06 20:09:53,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-06 20:09:53,968 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 63 states have internal predecessors, (96), 0 states have call successors, (0), 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 41 [2021-12-06 20:09:53,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:09:53,969 INFO L225 Difference]: With dead ends: 266 [2021-12-06 20:09:53,970 INFO L226 Difference]: Without dead ends: 264 [2021-12-06 20:09:53,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3999 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3111, Invalid=9771, Unknown=0, NotChecked=0, Total=12882 [2021-12-06 20:09:53,974 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 295 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:09:53,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 216 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1066 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:09:53,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-12-06 20:09:54,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 72. [2021-12-06 20:09:54,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 71 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:54,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2021-12-06 20:09:54,003 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 41 [2021-12-06 20:09:54,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:09:54,003 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2021-12-06 20:09:54,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 63 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:54,003 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2021-12-06 20:09:54,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 20:09:54,004 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:09:54,004 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:09:54,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 20:09:54,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 20:09:54,205 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:09:54,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:09:54,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1395466515, now seen corresponding path program 10 times [2021-12-06 20:09:54,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:09:54,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685693864] [2021-12-06 20:09:54,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:09:54,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:09:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:09:54,607 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 70 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:54,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:09:54,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685693864] [2021-12-06 20:09:54,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685693864] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:09:54,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224106491] [2021-12-06 20:09:54,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:09:54,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:09:54,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:09:54,609 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:09:54,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 20:09:54,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:09:54,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:09:54,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 20:09:54,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:09:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:54,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:09:55,749 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:55,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224106491] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:09:55,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:09:55,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 53 [2021-12-06 20:09:55,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239516230] [2021-12-06 20:09:55,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:09:55,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-06 20:09:55,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:09:55,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-06 20:09:55,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=2336, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 20:09:55,751 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:57,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:09:57,843 INFO L93 Difference]: Finished difference Result 277 states and 289 transitions. [2021-12-06 20:09:57,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-06 20:09:57,843 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 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 41 [2021-12-06 20:09:57,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:09:57,845 INFO L225 Difference]: With dead ends: 277 [2021-12-06 20:09:57,845 INFO L226 Difference]: Without dead ends: 244 [2021-12-06 20:09:57,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2272 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1320, Invalid=7610, Unknown=0, NotChecked=0, Total=8930 [2021-12-06 20:09:57,848 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 188 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:09:57,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 157 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:09:57,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-12-06 20:09:57,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 71. [2021-12-06 20:09:57,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:57,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-12-06 20:09:57,879 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 41 [2021-12-06 20:09:57,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:09:57,879 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-12-06 20:09:57,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:09:57,879 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-12-06 20:09:57,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 20:09:57,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:09:57,880 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:09:57,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 20:09:58,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 20:09:58,081 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:09:58,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:09:58,082 INFO L85 PathProgramCache]: Analyzing trace with hash 286483529, now seen corresponding path program 11 times [2021-12-06 20:09:58,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:09:58,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060197813] [2021-12-06 20:09:58,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:09:58,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:09:58,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:09:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 92 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:58,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:09:58,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060197813] [2021-12-06 20:09:58,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060197813] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:09:58,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117727410] [2021-12-06 20:09:58,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:09:58,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:09:58,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:09:58,486 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:09:58,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 20:09:58,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-06 20:09:58,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:09:58,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 20:09:58,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:09:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:58,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:09:59,792 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:09:59,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117727410] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:09:59,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:09:59,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 58 [2021-12-06 20:09:59,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173757412] [2021-12-06 20:09:59,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:09:59,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-06 20:09:59,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:09:59,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-06 20:09:59,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=2807, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 20:09:59,794 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:10:02,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:10:02,239 INFO L93 Difference]: Finished difference Result 268 states and 281 transitions. [2021-12-06 20:10:02,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-06 20:10:02,239 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-06 20:10:02,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:10:02,240 INFO L225 Difference]: With dead ends: 268 [2021-12-06 20:10:02,240 INFO L226 Difference]: Without dead ends: 232 [2021-12-06 20:10:02,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2747 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1564, Invalid=9148, Unknown=0, NotChecked=0, Total=10712 [2021-12-06 20:10:02,242 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 219 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:10:02,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 173 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:10:02,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-12-06 20:10:02,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 70. [2021-12-06 20:10:02,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 69 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:10:02,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2021-12-06 20:10:02,271 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 45 [2021-12-06 20:10:02,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:10:02,271 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2021-12-06 20:10:02,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:10:02,272 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2021-12-06 20:10:02,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 20:10:02,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:10:02,272 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:10:02,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 20:10:02,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 20:10:02,473 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:10:02,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:10:02,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1446573421, now seen corresponding path program 12 times [2021-12-06 20:10:02,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:10:02,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219038696] [2021-12-06 20:10:02,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:10:02,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:10:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:10:02,956 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 117 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:10:02,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:10:02,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219038696] [2021-12-06 20:10:02,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219038696] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:10:02,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741547059] [2021-12-06 20:10:02,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:10:02,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:10:02,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:10:02,957 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:10:02,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 20:10:02,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-06 20:10:02,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:10:02,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 20:10:02,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:10:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:10:03,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:10:04,716 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:10:04,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741547059] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:10:04,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:10:04,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 74 [2021-12-06 20:10:04,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616205002] [2021-12-06 20:10:04,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:10:04,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-06 20:10:04,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:10:04,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-06 20:10:04,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=4727, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 20:10:04,718 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 74 states, 74 states have (on average 1.8918918918918919) internal successors, (140), 74 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:10:06,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:10:06,440 INFO L93 Difference]: Finished difference Result 117 states and 123 transitions. [2021-12-06 20:10:06,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 20:10:06,440 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.8918918918918919) internal successors, (140), 74 states have internal predecessors, (140), 0 states have call successors, (0), 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 49 [2021-12-06 20:10:06,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:10:06,441 INFO L225 Difference]: With dead ends: 117 [2021-12-06 20:10:06,441 INFO L226 Difference]: Without dead ends: 78 [2021-12-06 20:10:06,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2479 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1233, Invalid=8867, Unknown=0, NotChecked=0, Total=10100 [2021-12-06 20:10:06,442 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 68 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:10:06,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 93 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:10:06,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-06 20:10:06,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2021-12-06 20:10:06,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 68 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:10:06,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2021-12-06 20:10:06,471 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 49 [2021-12-06 20:10:06,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:10:06,471 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2021-12-06 20:10:06,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.8918918918918919) internal successors, (140), 74 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:10:06,471 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2021-12-06 20:10:06,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 20:10:06,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:10:06,472 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:10:06,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 20:10:06,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 20:10:06,673 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:10:06,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:10:06,674 INFO L85 PathProgramCache]: Analyzing trace with hash -2015197751, now seen corresponding path program 13 times [2021-12-06 20:10:06,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:10:06,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429613500] [2021-12-06 20:10:06,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:10:06,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:10:06,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:10:07,256 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 145 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:10:07,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:10:07,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429613500] [2021-12-06 20:10:07,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429613500] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:10:07,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427198869] [2021-12-06 20:10:07,257 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:10:07,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:10:07,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:10:07,258 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:10:07,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 20:10:07,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:10:07,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-06 20:10:07,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:10:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:10:07,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:10:09,022 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:10:09,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427198869] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:10:09,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:10:09,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 68 [2021-12-06 20:10:09,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110485930] [2021-12-06 20:10:09,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:10:09,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-06 20:10:09,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:10:09,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-06 20:10:09,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=3878, Unknown=0, NotChecked=0, Total=4556 [2021-12-06 20:10:09,024 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:10:12,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:10:12,462 INFO L93 Difference]: Finished difference Result 232 states and 247 transitions. [2021-12-06 20:10:12,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-06 20:10:12,462 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 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 53 [2021-12-06 20:10:12,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:10:12,463 INFO L225 Difference]: With dead ends: 232 [2021-12-06 20:10:12,463 INFO L226 Difference]: Without dead ends: 190 [2021-12-06 20:10:12,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3829 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2115, Invalid=12647, Unknown=0, NotChecked=0, Total=14762 [2021-12-06 20:10:12,467 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 265 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 1677 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 1935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:10:12,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 237 Invalid, 1935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1677 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 20:10:12,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-12-06 20:10:12,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 68. [2021-12-06 20:10:12,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:10:12,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2021-12-06 20:10:12,497 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 53 [2021-12-06 20:10:12,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:10:12,498 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2021-12-06 20:10:12,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:10:12,498 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2021-12-06 20:10:12,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-06 20:10:12,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:10:12,498 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:10:12,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 20:10:12,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 20:10:12,700 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:10:12,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:10:12,701 INFO L85 PathProgramCache]: Analyzing trace with hash 895167469, now seen corresponding path program 14 times [2021-12-06 20:10:12,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:10:12,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978360930] [2021-12-06 20:10:12,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:10:12,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:10:12,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:10:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 176 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:10:13,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:10:13,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978360930] [2021-12-06 20:10:13,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978360930] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:10:13,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542208731] [2021-12-06 20:10:13,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:10:13,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:10:13,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:10:13,287 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:10:13,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 20:10:13,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:10:13,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:10:13,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-06 20:10:13,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:10:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:10:14,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:10:15,684 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:10:15,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542208731] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:10:15,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:10:15,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 86 [2021-12-06 20:10:15,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841195961] [2021-12-06 20:10:15,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:10:15,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-06 20:10:15,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:10:15,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-06 20:10:15,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=997, Invalid=6313, Unknown=0, NotChecked=0, Total=7310 [2021-12-06 20:10:15,686 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 86 states, 86 states have (on average 1.9069767441860466) internal successors, (164), 86 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:10:19,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:10:19,867 INFO L93 Difference]: Finished difference Result 205 states and 221 transitions. [2021-12-06 20:10:19,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-06 20:10:19,868 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.9069767441860466) internal successors, (164), 86 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-06 20:10:19,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:10:19,869 INFO L225 Difference]: With dead ends: 205 [2021-12-06 20:10:19,869 INFO L226 Difference]: Without dead ends: 160 [2021-12-06 20:10:19,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6358 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2842, Invalid=18038, Unknown=0, NotChecked=0, Total=20880 [2021-12-06 20:10:19,871 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 296 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 1958 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 2263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 1958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:10:19,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 269 Invalid, 2263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 1958 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 20:10:19,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-06 20:10:19,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 67. [2021-12-06 20:10:19,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:10:19,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2021-12-06 20:10:19,906 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 57 [2021-12-06 20:10:19,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:10:19,906 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2021-12-06 20:10:19,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.9069767441860466) internal successors, (164), 86 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:10:19,906 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2021-12-06 20:10:19,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 20:10:19,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:10:19,907 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:10:19,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 20:10:20,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:10:20,108 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:10:20,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:10:20,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1253672777, now seen corresponding path program 15 times [2021-12-06 20:10:20,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:10:20,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886691503] [2021-12-06 20:10:20,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:10:20,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:10:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:10:20,801 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 210 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:10:20,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:10:20,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886691503] [2021-12-06 20:10:20,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886691503] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:10:20,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551859625] [2021-12-06 20:10:20,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:10:20,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:10:20,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:10:20,802 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:10:20,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 20:10:20,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-12-06 20:10:20,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:10:20,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 20:10:20,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:10:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:10:21,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:10:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:10:23,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551859625] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:10:23,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:10:23,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 92 [2021-12-06 20:10:23,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621187146] [2021-12-06 20:10:23,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:10:23,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-12-06 20:10:23,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:10:23,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-12-06 20:10:23,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1020, Invalid=7352, Unknown=0, NotChecked=0, Total=8372 [2021-12-06 20:10:23,410 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 92 states, 92 states have (on average 1.9130434782608696) internal successors, (176), 92 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:10:26,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:10:26,432 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2021-12-06 20:10:26,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 20:10:26,432 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.9130434782608696) internal successors, (176), 92 states have internal predecessors, (176), 0 states have call successors, (0), 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 61 [2021-12-06 20:10:26,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:10:26,433 INFO L225 Difference]: With dead ends: 116 [2021-12-06 20:10:26,433 INFO L226 Difference]: Without dead ends: 68 [2021-12-06 20:10:26,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3871 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1845, Invalid=13655, Unknown=0, NotChecked=0, Total=15500 [2021-12-06 20:10:26,435 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 77 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:10:26,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 124 Invalid, 1660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1476 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 20:10:26,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-06 20:10:26,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-12-06 20:10:26,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:10:26,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-12-06 20:10:26,466 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 61 [2021-12-06 20:10:26,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:10:26,466 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-12-06 20:10:26,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.9130434782608696) internal successors, (176), 92 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:10:26,467 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-12-06 20:10:26,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 20:10:26,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:10:26,467 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:10:26,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 20:10:26,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:10:26,669 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:10:26,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:10:26,670 INFO L85 PathProgramCache]: Analyzing trace with hash -576617875, now seen corresponding path program 16 times [2021-12-06 20:10:26,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:10:26,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788212076] [2021-12-06 20:10:26,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:10:26,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:10:26,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:10:27,430 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 247 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:10:27,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:10:27,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788212076] [2021-12-06 20:10:27,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788212076] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:10:27,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751964748] [2021-12-06 20:10:27,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:10:27,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:10:27,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:10:27,431 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:10:27,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 20:10:27,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:10:27,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:10:27,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-06 20:10:27,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:10:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:10:28,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:10:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:10:29,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751964748] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:10:29,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:10:29,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 83 [2021-12-06 20:10:29,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226564565] [2021-12-06 20:10:29,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:10:29,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-06 20:10:29,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:10:29,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-06 20:10:29,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=999, Invalid=5807, Unknown=0, NotChecked=0, Total=6806 [2021-12-06 20:10:29,824 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 83 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 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) [2021-12-06 20:10:34,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:10:34,783 INFO L93 Difference]: Finished difference Result 181 states and 200 transitions. [2021-12-06 20:10:34,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-12-06 20:10:34,784 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 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 65 [2021-12-06 20:10:34,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:10:34,784 INFO L225 Difference]: With dead ends: 181 [2021-12-06 20:10:34,784 INFO L226 Difference]: Without dead ends: 130 [2021-12-06 20:10:34,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5782 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=3099, Invalid=18953, Unknown=0, NotChecked=0, Total=22052 [2021-12-06 20:10:34,786 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 343 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 2435 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 2799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 2435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:10:34,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 329 Invalid, 2799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 2435 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 20:10:34,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-06 20:10:34,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 86. [2021-12-06 20:10:34,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.2) internal successors, (102), 85 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:10:34,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2021-12-06 20:10:34,839 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 65 [2021-12-06 20:10:34,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:10:34,839 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2021-12-06 20:10:34,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 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) [2021-12-06 20:10:34,839 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2021-12-06 20:10:34,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 20:10:34,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:10:34,839 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:10:34,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 20:10:35,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 20:10:35,041 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:10:35,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:10:35,042 INFO L85 PathProgramCache]: Analyzing trace with hash -181376823, now seen corresponding path program 17 times [2021-12-06 20:10:35,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:10:35,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834893978] [2021-12-06 20:10:35,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:10:35,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:10:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:10:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 287 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:10:35,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:10:35,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834893978] [2021-12-06 20:10:35,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834893978] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:10:35,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927020988] [2021-12-06 20:10:35,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:10:35,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:10:35,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:10:35,838 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:10:35,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 20:10:35,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-12-06 20:10:35,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:10:35,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-06 20:10:35,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:10:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:10:36,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:10:38,493 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:10:38,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927020988] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:10:38,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:10:38,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 88 [2021-12-06 20:10:38,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590088365] [2021-12-06 20:10:38,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:10:38,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-12-06 20:10:38,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:10:38,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-12-06 20:10:38,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1120, Invalid=6536, Unknown=0, NotChecked=0, Total=7656 [2021-12-06 20:10:38,498 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 88 states, 88 states have (on average 2.090909090909091) internal successors, (184), 88 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:10:44,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:10:44,157 INFO L93 Difference]: Finished difference Result 236 states and 256 transitions. [2021-12-06 20:10:44,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-12-06 20:10:44,157 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.090909090909091) internal successors, (184), 88 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-06 20:10:44,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:10:44,158 INFO L225 Difference]: With dead ends: 236 [2021-12-06 20:10:44,158 INFO L226 Difference]: Without dead ends: 182 [2021-12-06 20:10:44,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6521 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=3469, Invalid=21337, Unknown=0, NotChecked=0, Total=24806 [2021-12-06 20:10:44,160 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 388 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 2741 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 3163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 2741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:10:44,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 442 Invalid, 3163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 2741 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 20:10:44,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-06 20:10:44,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2021-12-06 20:10:44,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.1407407407407408) internal successors, (154), 135 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:10:44,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 154 transitions. [2021-12-06 20:10:44,248 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 154 transitions. Word has length 69 [2021-12-06 20:10:44,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:10:44,248 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 154 transitions. [2021-12-06 20:10:44,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.090909090909091) internal successors, (184), 88 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:10:44,248 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 154 transitions. [2021-12-06 20:10:44,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 20:10:44,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:10:44,249 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:10:44,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 20:10:44,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-06 20:10:44,450 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:10:44,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:10:44,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1267468051, now seen corresponding path program 18 times [2021-12-06 20:10:44,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:10:44,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73132395] [2021-12-06 20:10:44,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:10:44,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:10:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:10:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 330 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:10:45,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:10:45,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73132395] [2021-12-06 20:10:45,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73132395] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:10:45,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055803822] [2021-12-06 20:10:45,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:10:45,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:10:45,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:10:45,322 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:10:45,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 20:10:45,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-12-06 20:10:45,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:10:45,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-06 20:10:45,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:10:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:10:46,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:10:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:10:48,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055803822] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:10:48,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:10:48,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 110 [2021-12-06 20:10:48,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858932441] [2021-12-06 20:10:48,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:10:48,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2021-12-06 20:10:48,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:10:48,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-12-06 20:10:48,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1437, Invalid=10553, Unknown=0, NotChecked=0, Total=11990 [2021-12-06 20:10:48,837 INFO L87 Difference]: Start difference. First operand 136 states and 154 transitions. Second operand has 110 states, 110 states have (on average 1.9272727272727272) internal successors, (212), 110 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:10:53,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:10:53,475 INFO L93 Difference]: Finished difference Result 197 states and 216 transitions. [2021-12-06 20:10:53,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 20:10:53,476 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.9272727272727272) internal successors, (212), 110 states have internal predecessors, (212), 0 states have call successors, (0), 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 73 [2021-12-06 20:10:53,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:10:53,477 INFO L225 Difference]: With dead ends: 197 [2021-12-06 20:10:53,477 INFO L226 Difference]: Without dead ends: 140 [2021-12-06 20:10:53,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5569 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2583, Invalid=19469, Unknown=0, NotChecked=0, Total=22052 [2021-12-06 20:10:53,478 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 88 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 2023 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 2275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 2023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:10:53,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 131 Invalid, 2275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 2023 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 20:10:53,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-06 20:10:53,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 136. [2021-12-06 20:10:53,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.1333333333333333) internal successors, (153), 135 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:10:53,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 153 transitions. [2021-12-06 20:10:53,567 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 153 transitions. Word has length 73 [2021-12-06 20:10:53,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:10:53,567 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 153 transitions. [2021-12-06 20:10:53,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.9272727272727272) internal successors, (212), 110 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:10:53,567 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 153 transitions. [2021-12-06 20:10:53,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-06 20:10:53,568 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:10:53,568 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:10:53,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 20:10:53,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-06 20:10:53,769 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:10:53,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:10:53,770 INFO L85 PathProgramCache]: Analyzing trace with hash -473444811, now seen corresponding path program 19 times [2021-12-06 20:10:53,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:10:53,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703268312] [2021-12-06 20:10:53,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:10:53,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:10:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:10:54,161 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 136 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:10:54,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:10:54,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703268312] [2021-12-06 20:10:54,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703268312] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:10:54,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602843521] [2021-12-06 20:10:54,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:10:54,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:10:54,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:10:54,162 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:10:54,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 20:10:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:10:54,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-06 20:10:54,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:10:54,684 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 563 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:10:54,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:10:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 563 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:10:55,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602843521] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:10:55,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:10:55,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 75 [2021-12-06 20:10:55,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218511694] [2021-12-06 20:10:55,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:10:55,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-06 20:10:55,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:10:55,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-06 20:10:55,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=916, Invalid=4634, Unknown=0, NotChecked=0, Total=5550 [2021-12-06 20:10:55,115 INFO L87 Difference]: Start difference. First operand 136 states and 153 transitions. Second operand has 75 states, 75 states have (on average 1.52) internal successors, (114), 75 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:10:56,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:10:56,004 INFO L93 Difference]: Finished difference Result 194 states and 213 transitions. [2021-12-06 20:10:56,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 20:10:56,005 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.52) internal successors, (114), 75 states have internal predecessors, (114), 0 states have call successors, (0), 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 74 [2021-12-06 20:10:56,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:10:56,006 INFO L225 Difference]: With dead ends: 194 [2021-12-06 20:10:56,006 INFO L226 Difference]: Without dead ends: 192 [2021-12-06 20:10:56,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3361 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2199, Invalid=10011, Unknown=0, NotChecked=0, Total=12210 [2021-12-06 20:10:56,007 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 118 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:10:56,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 113 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:10:56,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-12-06 20:10:56,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 78. [2021-12-06 20:10:56,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:10:56,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-12-06 20:10:56,063 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 74 [2021-12-06 20:10:56,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:10:56,063 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-12-06 20:10:56,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.52) internal successors, (114), 75 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:10:56,063 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-12-06 20:10:56,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-06 20:10:56,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:10:56,064 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:10:56,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 20:10:56,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 20:10:56,265 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:10:56,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:10:56,266 INFO L85 PathProgramCache]: Analyzing trace with hash 283060809, now seen corresponding path program 20 times [2021-12-06 20:10:56,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:10:56,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21299295] [2021-12-06 20:10:56,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:10:56,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:10:56,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:10:57,267 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 376 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:10:57,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:10:57,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21299295] [2021-12-06 20:10:57,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21299295] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:10:57,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388144882] [2021-12-06 20:10:57,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:10:57,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:10:57,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:10:57,269 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:10:57,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 20:10:57,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:10:57,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:10:57,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 112 conjunts are in the unsatisfiable core [2021-12-06 20:10:57,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:10:58,678 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:10:58,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:11:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:11:01,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388144882] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:11:01,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:11:01,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 116 [2021-12-06 20:11:01,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485818256] [2021-12-06 20:11:01,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:11:01,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-12-06 20:11:01,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:11:01,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-12-06 20:11:01,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1777, Invalid=11563, Unknown=0, NotChecked=0, Total=13340 [2021-12-06 20:11:01,056 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 116 states, 116 states have (on average 1.9310344827586208) internal successors, (224), 116 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:11:08,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:11:08,950 INFO L93 Difference]: Finished difference Result 214 states and 236 transitions. [2021-12-06 20:11:08,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-12-06 20:11:08,951 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.9310344827586208) internal successors, (224), 116 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-06 20:11:08,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:11:08,951 INFO L225 Difference]: With dead ends: 214 [2021-12-06 20:11:08,951 INFO L226 Difference]: Without dead ends: 154 [2021-12-06 20:11:08,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11738 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=5032, Invalid=32798, Unknown=0, NotChecked=0, Total=37830 [2021-12-06 20:11:08,953 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 449 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 3728 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 4234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 3728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:11:08,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 461 Invalid, 4234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 3728 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 20:11:08,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-12-06 20:11:09,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 101. [2021-12-06 20:11:09,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.2) internal successors, (120), 100 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:11:09,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 120 transitions. [2021-12-06 20:11:09,038 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 120 transitions. Word has length 77 [2021-12-06 20:11:09,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:11:09,038 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 120 transitions. [2021-12-06 20:11:09,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.9310344827586208) internal successors, (224), 116 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:11:09,039 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 120 transitions. [2021-12-06 20:11:09,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 20:11:09,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:11:09,040 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:11:09,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-06 20:11:09,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:11:09,241 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:11:09,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:11:09,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1899663213, now seen corresponding path program 21 times [2021-12-06 20:11:09,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:11:09,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553013718] [2021-12-06 20:11:09,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:11:09,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:11:09,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:11:10,278 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 425 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:11:10,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:11:10,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553013718] [2021-12-06 20:11:10,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553013718] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:11:10,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397679172] [2021-12-06 20:11:10,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:11:10,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:11:10,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:11:10,280 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:11:10,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 20:11:10,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-12-06 20:11:10,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:11:10,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-06 20:11:10,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:11:11,853 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:11:11,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:11:14,321 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:11:14,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397679172] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:11:14,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:11:14,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 122 [2021-12-06 20:11:14,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557313520] [2021-12-06 20:11:14,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:11:14,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2021-12-06 20:11:14,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:11:14,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-12-06 20:11:14,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1755, Invalid=13007, Unknown=0, NotChecked=0, Total=14762 [2021-12-06 20:11:14,324 INFO L87 Difference]: Start difference. First operand 101 states and 120 transitions. Second operand has 122 states, 122 states have (on average 1.9344262295081966) internal successors, (236), 122 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:11:20,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:11:20,054 INFO L93 Difference]: Finished difference Result 168 states and 188 transitions. [2021-12-06 20:11:20,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-06 20:11:20,055 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.9344262295081966) internal successors, (236), 122 states have internal predecessors, (236), 0 states have call successors, (0), 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 81 [2021-12-06 20:11:20,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:11:20,056 INFO L225 Difference]: With dead ends: 168 [2021-12-06 20:11:20,056 INFO L226 Difference]: Without dead ends: 105 [2021-12-06 20:11:20,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6871 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=3145, Invalid=23915, Unknown=0, NotChecked=0, Total=27060 [2021-12-06 20:11:20,057 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 96 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 2691 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 2986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 2691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:11:20,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 161 Invalid, 2986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 2691 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 20:11:20,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-06 20:11:20,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2021-12-06 20:11:20,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.19) internal successors, (119), 100 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:11:20,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2021-12-06 20:11:20,139 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 81 [2021-12-06 20:11:20,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:11:20,139 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2021-12-06 20:11:20,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.9344262295081966) internal successors, (236), 122 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:11:20,140 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2021-12-06 20:11:20,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 20:11:20,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:11:20,140 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:11:20,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 20:11:20,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 20:11:20,341 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:11:20,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:11:20,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1093180597, now seen corresponding path program 22 times [2021-12-06 20:11:20,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:11:20,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773391433] [2021-12-06 20:11:20,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:11:20,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:11:20,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:11:20,755 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 171 proven. 534 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:11:20,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:11:20,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773391433] [2021-12-06 20:11:20,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773391433] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:11:20,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182878232] [2021-12-06 20:11:20,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:11:20,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:11:20,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:11:20,756 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:11:20,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 20:11:20,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:11:20,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:11:20,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-06 20:11:20,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:11:21,325 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:11:21,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:11:21,797 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:11:21,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182878232] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:11:21,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:11:21,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 83 [2021-12-06 20:11:21,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600144292] [2021-12-06 20:11:21,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:11:21,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-06 20:11:21,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:11:21,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-06 20:11:21,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1117, Invalid=5689, Unknown=0, NotChecked=0, Total=6806 [2021-12-06 20:11:21,799 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand has 83 states, 83 states have (on average 1.5180722891566265) internal successors, (126), 83 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:11:22,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:11:22,831 INFO L93 Difference]: Finished difference Result 165 states and 184 transitions. [2021-12-06 20:11:22,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-06 20:11:22,831 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.5180722891566265) internal successors, (126), 83 states have internal predecessors, (126), 0 states have call successors, (0), 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 82 [2021-12-06 20:11:22,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:11:22,832 INFO L225 Difference]: With dead ends: 165 [2021-12-06 20:11:22,832 INFO L226 Difference]: Without dead ends: 163 [2021-12-06 20:11:22,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4156 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2683, Invalid=12323, Unknown=0, NotChecked=0, Total=15006 [2021-12-06 20:11:22,833 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 170 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:11:22,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 125 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:11:22,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-06 20:11:22,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 86. [2021-12-06 20:11:22,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:11:22,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2021-12-06 20:11:22,905 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 82 [2021-12-06 20:11:22,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:11:22,905 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2021-12-06 20:11:22,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.5180722891566265) internal successors, (126), 83 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:11:22,905 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2021-12-06 20:11:22,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 20:11:22,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:11:22,905 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:11:22,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-06 20:11:23,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 20:11:23,106 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:11:23,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:11:23,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1789015095, now seen corresponding path program 23 times [2021-12-06 20:11:23,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:11:23,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375149384] [2021-12-06 20:11:23,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:11:23,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:11:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:11:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 477 proven. 284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:11:24,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:11:24,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375149384] [2021-12-06 20:11:24,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375149384] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:11:24,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914571636] [2021-12-06 20:11:24,173 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:11:24,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:11:24,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:11:24,174 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:11:24,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 20:11:24,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-12-06 20:11:24,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:11:24,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-06 20:11:24,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:11:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:11:25,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:11:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:11:27,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914571636] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:11:27,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:11:27,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 108 [2021-12-06 20:11:27,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952003707] [2021-12-06 20:11:27,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:11:27,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-12-06 20:11:27,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:11:27,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-12-06 20:11:27,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1674, Invalid=9882, Unknown=0, NotChecked=0, Total=11556 [2021-12-06 20:11:27,691 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 108 states, 108 states have (on average 2.111111111111111) internal successors, (228), 108 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:11:36,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:11:36,590 INFO L93 Difference]: Finished difference Result 236 states and 260 transitions. [2021-12-06 20:11:36,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-12-06 20:11:36,591 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.111111111111111) internal successors, (228), 108 states have internal predecessors, (228), 0 states have call successors, (0), 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 85 [2021-12-06 20:11:36,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:11:36,592 INFO L225 Difference]: With dead ends: 236 [2021-12-06 20:11:36,592 INFO L226 Difference]: Without dead ends: 170 [2021-12-06 20:11:36,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9917 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=5159, Invalid=32283, Unknown=0, NotChecked=0, Total=37442 [2021-12-06 20:11:36,595 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 510 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 4028 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 4612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 4028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:11:36,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [510 Valid, 536 Invalid, 4612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 4028 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 20:11:36,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-06 20:11:36,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 111. [2021-12-06 20:11:36,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.2) internal successors, (132), 110 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:11:36,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 132 transitions. [2021-12-06 20:11:36,714 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 132 transitions. Word has length 85 [2021-12-06 20:11:36,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:11:36,714 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 132 transitions. [2021-12-06 20:11:36,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.111111111111111) internal successors, (228), 108 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:11:36,714 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 132 transitions. [2021-12-06 20:11:36,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 20:11:36,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:11:36,715 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:11:36,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-06 20:11:36,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 20:11:36,916 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:11:36,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:11:36,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1654831635, now seen corresponding path program 24 times [2021-12-06 20:11:36,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:11:36,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403188039] [2021-12-06 20:11:36,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:11:36,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:11:36,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:11:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 532 proven. 309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:11:38,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:11:38,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403188039] [2021-12-06 20:11:38,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403188039] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:11:38,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994094701] [2021-12-06 20:11:38,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:11:38,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:11:38,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:11:38,132 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:11:38,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 20:11:38,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-12-06 20:11:38,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:11:38,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-06 20:11:38,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:11:40,052 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:11:40,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:11:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:11:43,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994094701] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:11:43,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:11:43,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 134 [2021-12-06 20:11:43,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203526299] [2021-12-06 20:11:43,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:11:43,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2021-12-06 20:11:43,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:11:43,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2021-12-06 20:11:43,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2105, Invalid=15717, Unknown=0, NotChecked=0, Total=17822 [2021-12-06 20:11:43,034 INFO L87 Difference]: Start difference. First operand 111 states and 132 transitions. Second operand has 134 states, 134 states have (on average 1.9402985074626866) internal successors, (260), 134 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:11:49,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:11:49,796 INFO L93 Difference]: Finished difference Result 184 states and 206 transitions. [2021-12-06 20:11:49,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-06 20:11:49,796 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.9402985074626866) internal successors, (260), 134 states have internal predecessors, (260), 0 states have call successors, (0), 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 89 [2021-12-06 20:11:49,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:11:49,797 INFO L225 Difference]: With dead ends: 184 [2021-12-06 20:11:49,797 INFO L226 Difference]: Without dead ends: 115 [2021-12-06 20:11:49,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8309 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=3763, Invalid=28817, Unknown=0, NotChecked=0, Total=32580 [2021-12-06 20:11:49,799 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 113 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 2030 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 2379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 2030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:11:49,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 125 Invalid, 2379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 2030 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 20:11:49,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-06 20:11:49,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2021-12-06 20:11:49,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.190909090909091) internal successors, (131), 110 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) [2021-12-06 20:11:49,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2021-12-06 20:11:49,912 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 89 [2021-12-06 20:11:49,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:11:49,912 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2021-12-06 20:11:49,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.9402985074626866) internal successors, (260), 134 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:11:49,913 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2021-12-06 20:11:49,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-06 20:11:49,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:11:49,913 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:11:49,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-06 20:11:50,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 20:11:50,114 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:11:50,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:11:50,116 INFO L85 PathProgramCache]: Analyzing trace with hash -869430475, now seen corresponding path program 25 times [2021-12-06 20:11:50,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:11:50,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81493398] [2021-12-06 20:11:50,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:11:50,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:11:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:11:50,562 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 210 proven. 653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:11:50,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:11:50,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81493398] [2021-12-06 20:11:50,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81493398] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:11:50,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932523081] [2021-12-06 20:11:50,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:11:50,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:11:50,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:11:50,564 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:11:50,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 20:11:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:11:50,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-06 20:11:50,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:11:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 0 proven. 863 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:11:51,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:11:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 0 proven. 863 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:11:51,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932523081] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:11:51,818 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:11:51,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 91 [2021-12-06 20:11:51,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095197674] [2021-12-06 20:11:51,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:11:51,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-12-06 20:11:51,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:11:51,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-12-06 20:11:51,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1338, Invalid=6852, Unknown=0, NotChecked=0, Total=8190 [2021-12-06 20:11:51,820 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand has 91 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 91 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:11:52,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:11:52,977 INFO L93 Difference]: Finished difference Result 181 states and 202 transitions. [2021-12-06 20:11:52,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-06 20:11:52,977 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 91 states have internal predecessors, (138), 0 states have call successors, (0), 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 90 [2021-12-06 20:11:52,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:11:52,978 INFO L225 Difference]: With dead ends: 181 [2021-12-06 20:11:52,978 INFO L226 Difference]: Without dead ends: 179 [2021-12-06 20:11:52,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5035 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3215, Invalid=14875, Unknown=0, NotChecked=0, Total=18090 [2021-12-06 20:11:52,979 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 168 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:11:52,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 133 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:11:52,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-06 20:11:53,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 94. [2021-12-06 20:11:53,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:11:53,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2021-12-06 20:11:53,066 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 90 [2021-12-06 20:11:53,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:11:53,067 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2021-12-06 20:11:53,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 91 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:11:53,067 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2021-12-06 20:11:53,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-06 20:11:53,067 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:11:53,067 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:11:53,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-06 20:11:53,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:11:53,268 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:11:53,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:11:53,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1749306697, now seen corresponding path program 26 times [2021-12-06 20:11:53,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:11:53,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559501185] [2021-12-06 20:11:53,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:11:53,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:11:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:11:54,547 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 590 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:11:54,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:11:54,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559501185] [2021-12-06 20:11:54,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559501185] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:11:54,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946111348] [2021-12-06 20:11:54,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:11:54,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:11:54,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:11:54,548 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:11:54,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 20:11:54,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:11:54,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:11:54,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 136 conjunts are in the unsatisfiable core [2021-12-06 20:11:54,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:11:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:11:56,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:11:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:11:59,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946111348] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:11:59,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:11:59,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 140 [2021-12-06 20:11:59,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514801606] [2021-12-06 20:11:59,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:11:59,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2021-12-06 20:11:59,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:11:59,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2021-12-06 20:11:59,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2563, Invalid=16897, Unknown=0, NotChecked=0, Total=19460 [2021-12-06 20:11:59,750 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 140 states, 140 states have (on average 1.9428571428571428) internal successors, (272), 140 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:12:11,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:12:11,205 INFO L93 Difference]: Finished difference Result 258 states and 284 transitions. [2021-12-06 20:12:11,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-12-06 20:12:11,205 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 1.9428571428571428) internal successors, (272), 140 states have internal predecessors, (272), 0 states have call successors, (0), 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 93 [2021-12-06 20:12:11,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:12:11,206 INFO L225 Difference]: With dead ends: 258 [2021-12-06 20:12:11,206 INFO L226 Difference]: Without dead ends: 186 [2021-12-06 20:12:11,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17212 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=7234, Invalid=47756, Unknown=0, NotChecked=0, Total=54990 [2021-12-06 20:12:11,209 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 580 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 5304 mSolverCounterSat, 709 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 6013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 709 IncrementalHoareTripleChecker+Valid, 5304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:12:11,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [580 Valid, 645 Invalid, 6013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [709 Valid, 5304 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-06 20:12:11,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-06 20:12:11,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 121. [2021-12-06 20:12:11,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.2) internal successors, (144), 120 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:12:11,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2021-12-06 20:12:11,344 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 93 [2021-12-06 20:12:11,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:12:11,344 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2021-12-06 20:12:11,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 1.9428571428571428) internal successors, (272), 140 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:12:11,344 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2021-12-06 20:12:11,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-06 20:12:11,345 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:12:11,345 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:12:11,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-06 20:12:11,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-06 20:12:11,546 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:12:11,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:12:11,547 INFO L85 PathProgramCache]: Analyzing trace with hash 340008045, now seen corresponding path program 27 times [2021-12-06 20:12:11,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:12:11,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884820580] [2021-12-06 20:12:11,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:12:11,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:12:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:12:12,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 651 proven. 362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:12:12,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:12:12,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884820580] [2021-12-06 20:12:12,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884820580] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:12:12,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695596631] [2021-12-06 20:12:12,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:12:12,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:12:12,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:12:12,917 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:12:12,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-06 20:12:12,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-12-06 20:12:12,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:12:12,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-06 20:12:12,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:12:15,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:12:15,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:12:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:12:18,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695596631] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:12:18,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:12:18,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 146 [2021-12-06 20:12:18,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070947191] [2021-12-06 20:12:18,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:12:18,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2021-12-06 20:12:18,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:12:18,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2021-12-06 20:12:18,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=18683, Unknown=0, NotChecked=0, Total=21170 [2021-12-06 20:12:18,610 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand has 146 states, 146 states have (on average 1.9452054794520548) internal successors, (284), 146 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:12:27,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:12:27,262 INFO L93 Difference]: Finished difference Result 200 states and 224 transitions. [2021-12-06 20:12:27,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-06 20:12:27,263 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 1.9452054794520548) internal successors, (284), 146 states have internal predecessors, (284), 0 states have call successors, (0), 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 97 [2021-12-06 20:12:27,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:12:27,264 INFO L225 Difference]: With dead ends: 200 [2021-12-06 20:12:27,264 INFO L226 Difference]: Without dead ends: 125 [2021-12-06 20:12:27,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9883 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=4437, Invalid=34175, Unknown=0, NotChecked=0, Total=38612 [2021-12-06 20:12:27,266 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 109 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 3535 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 3943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 3535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:12:27,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 169 Invalid, 3943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 3535 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 20:12:27,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-06 20:12:27,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2021-12-06 20:12:27,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.1916666666666667) internal successors, (143), 120 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:12:27,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2021-12-06 20:12:27,399 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 97 [2021-12-06 20:12:27,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:12:27,399 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2021-12-06 20:12:27,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 1.9452054794520548) internal successors, (284), 146 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:12:27,399 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2021-12-06 20:12:27,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-06 20:12:27,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:12:27,400 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:12:27,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-06 20:12:27,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:12:27,601 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:12:27,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:12:27,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1740727883, now seen corresponding path program 28 times [2021-12-06 20:12:27,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:12:27,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293130235] [2021-12-06 20:12:27,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:12:27,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:12:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:12:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 253 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:12:28,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:12:28,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293130235] [2021-12-06 20:12:28,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293130235] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:12:28,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897518366] [2021-12-06 20:12:28,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:12:28,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:12:28,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:12:28,044 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:12:28,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-06 20:12:28,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:12:28,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:12:28,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-06 20:12:28,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:12:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 0 proven. 1037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:12:28,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:12:29,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 0 proven. 1037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:12:29,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897518366] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:12:29,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:12:29,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2021-12-06 20:12:29,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446871133] [2021-12-06 20:12:29,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:12:29,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-12-06 20:12:29,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:12:29,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-12-06 20:12:29,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1579, Invalid=8123, Unknown=0, NotChecked=0, Total=9702 [2021-12-06 20:12:29,402 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand has 99 states, 99 states have (on average 1.5151515151515151) internal successors, (150), 99 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:12:30,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:12:30,738 INFO L93 Difference]: Finished difference Result 197 states and 220 transitions. [2021-12-06 20:12:30,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-06 20:12:30,738 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.5151515151515151) internal successors, (150), 99 states have internal predecessors, (150), 0 states have call successors, (0), 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 98 [2021-12-06 20:12:30,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:12:30,739 INFO L225 Difference]: With dead ends: 197 [2021-12-06 20:12:30,739 INFO L226 Difference]: Without dead ends: 195 [2021-12-06 20:12:30,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 144 SyntacticMatches, 3 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5998 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3795, Invalid=17667, Unknown=0, NotChecked=0, Total=21462 [2021-12-06 20:12:30,740 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 212 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:12:30,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 132 Invalid, 1510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 1128 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:12:30,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-06 20:12:30,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 102. [2021-12-06 20:12:30,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:12:30,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2021-12-06 20:12:30,846 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 98 [2021-12-06 20:12:30,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:12:30,846 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2021-12-06 20:12:30,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.5151515151515151) internal successors, (150), 99 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:12:30,847 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2021-12-06 20:12:30,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 20:12:30,847 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:12:30,847 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:12:30,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-06 20:12:31,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:12:31,048 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:12:31,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:12:31,050 INFO L85 PathProgramCache]: Analyzing trace with hash -584405303, now seen corresponding path program 29 times [2021-12-06 20:12:31,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:12:31,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661026973] [2021-12-06 20:12:31,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:12:31,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:12:31,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:12:32,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 715 proven. 390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:12:32,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:12:32,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661026973] [2021-12-06 20:12:32,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661026973] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:12:32,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185867044] [2021-12-06 20:12:32,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:12:32,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:12:32,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:12:32,478 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:12:32,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-06 20:12:32,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-12-06 20:12:32,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:12:32,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 101 conjunts are in the unsatisfiable core [2021-12-06 20:12:32,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:12:33,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:12:33,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:12:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:12:37,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185867044] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:12:37,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:12:37,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 128 [2021-12-06 20:12:37,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906157439] [2021-12-06 20:12:37,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:12:37,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-12-06 20:12:37,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:12:37,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-12-06 20:12:37,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2340, Invalid=13916, Unknown=0, NotChecked=0, Total=16256 [2021-12-06 20:12:37,214 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 128 states, 128 states have (on average 2.125) internal successors, (272), 128 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:12:50,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:12:50,255 INFO L93 Difference]: Finished difference Result 280 states and 308 transitions. [2021-12-06 20:12:50,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-12-06 20:12:50,255 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.125) internal successors, (272), 128 states have internal predecessors, (272), 0 states have call successors, (0), 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 101 [2021-12-06 20:12:50,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:12:50,257 INFO L225 Difference]: With dead ends: 280 [2021-12-06 20:12:50,257 INFO L226 Difference]: Without dead ends: 202 [2021-12-06 20:12:50,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14017 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=7185, Invalid=45485, Unknown=0, NotChecked=0, Total=52670 [2021-12-06 20:12:50,259 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 647 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 5592 mSolverCounterSat, 816 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 6408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 816 IncrementalHoareTripleChecker+Valid, 5592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:12:50,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 730 Invalid, 6408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [816 Valid, 5592 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 20:12:50,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-06 20:12:50,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 131. [2021-12-06 20:12:50,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.2) internal successors, (156), 130 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:12:50,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 156 transitions. [2021-12-06 20:12:50,425 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 156 transitions. Word has length 101 [2021-12-06 20:12:50,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:12:50,425 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 156 transitions. [2021-12-06 20:12:50,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.125) internal successors, (272), 128 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:12:50,426 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 156 transitions. [2021-12-06 20:12:50,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-06 20:12:50,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:12:50,426 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:12:50,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-06 20:12:50,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:12:50,627 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:12:50,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:12:50,628 INFO L85 PathProgramCache]: Analyzing trace with hash -2091445523, now seen corresponding path program 30 times [2021-12-06 20:12:50,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:12:50,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462110648] [2021-12-06 20:12:50,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:12:50,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:12:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:12:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 782 proven. 419 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:12:52,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:12:52,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462110648] [2021-12-06 20:12:52,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462110648] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:12:52,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261537789] [2021-12-06 20:12:52,182 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:12:52,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:12:52,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:12:52,182 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:12:52,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-06 20:12:52,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-12-06 20:12:52,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:12:52,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-06 20:12:52,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:12:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:12:54,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:12:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:12:58,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261537789] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:12:58,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:12:58,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 158 [2021-12-06 20:12:58,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307207018] [2021-12-06 20:12:58,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:12:58,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2021-12-06 20:12:58,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:12:58,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2021-12-06 20:12:58,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2901, Invalid=21905, Unknown=0, NotChecked=0, Total=24806 [2021-12-06 20:12:58,522 INFO L87 Difference]: Start difference. First operand 131 states and 156 transitions. Second operand has 158 states, 158 states have (on average 1.9493670886075949) internal successors, (308), 158 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:13:08,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:13:08,906 INFO L93 Difference]: Finished difference Result 216 states and 242 transitions. [2021-12-06 20:13:08,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-06 20:13:08,906 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 1.9493670886075949) internal successors, (308), 158 states have internal predecessors, (308), 0 states have call successors, (0), 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 105 [2021-12-06 20:13:08,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:13:08,907 INFO L225 Difference]: With dead ends: 216 [2021-12-06 20:13:08,907 INFO L226 Difference]: Without dead ends: 135 [2021-12-06 20:13:08,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11593 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=5167, Invalid=39989, Unknown=0, NotChecked=0, Total=45156 [2021-12-06 20:13:08,909 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 135 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 3963 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 4407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 3963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:13:08,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 182 Invalid, 4407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 3963 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 20:13:08,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-06 20:13:09,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2021-12-06 20:13:09,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.1923076923076923) internal successors, (155), 130 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:13:09,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 155 transitions. [2021-12-06 20:13:09,071 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 155 transitions. Word has length 105 [2021-12-06 20:13:09,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:13:09,072 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 155 transitions. [2021-12-06 20:13:09,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 1.9493670886075949) internal successors, (308), 158 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:13:09,072 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 155 transitions. [2021-12-06 20:13:09,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-06 20:13:09,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:13:09,072 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:13:09,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-06 20:13:09,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-06 20:13:09,274 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:13:09,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:13:09,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1966880715, now seen corresponding path program 31 times [2021-12-06 20:13:09,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:13:09,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063445299] [2021-12-06 20:13:09,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:09,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:13:09,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:09,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 300 proven. 927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:13:09,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:13:09,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063445299] [2021-12-06 20:13:09,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063445299] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:13:09,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725412047] [2021-12-06 20:13:09,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:13:09,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:13:09,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:13:09,859 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:13:09,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-06 20:13:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:09,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-06 20:13:09,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:13:10,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 0 proven. 1227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:13:10,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:13:11,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 0 proven. 1227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:13:11,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725412047] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:13:11,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:13:11,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2021-12-06 20:13:11,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649729980] [2021-12-06 20:13:11,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:13:11,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-12-06 20:13:11,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:13:11,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-12-06 20:13:11,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1840, Invalid=9502, Unknown=0, NotChecked=0, Total=11342 [2021-12-06 20:13:11,409 INFO L87 Difference]: Start difference. First operand 131 states and 155 transitions. Second operand has 107 states, 107 states have (on average 1.514018691588785) internal successors, (162), 107 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:13:13,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:13:13,023 INFO L93 Difference]: Finished difference Result 213 states and 238 transitions. [2021-12-06 20:13:13,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-06 20:13:13,024 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.514018691588785) internal successors, (162), 107 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-12-06 20:13:13,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:13:13,025 INFO L225 Difference]: With dead ends: 213 [2021-12-06 20:13:13,025 INFO L226 Difference]: Without dead ends: 211 [2021-12-06 20:13:13,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 156 SyntacticMatches, 3 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7045 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4423, Invalid=20699, Unknown=0, NotChecked=0, Total=25122 [2021-12-06 20:13:13,026 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 324 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 565 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 1883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 565 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:13:13,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 143 Invalid, 1883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [565 Valid, 1318 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:13:13,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-12-06 20:13:13,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 110. [2021-12-06 20:13:13,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:13:13,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2021-12-06 20:13:13,152 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 106 [2021-12-06 20:13:13,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:13:13,152 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2021-12-06 20:13:13,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.514018691588785) internal successors, (162), 107 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:13:13,152 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2021-12-06 20:13:13,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-06 20:13:13,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:13:13,153 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:13:13,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-06 20:13:13,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-06 20:13:13,354 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:13:13,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:13:13,355 INFO L85 PathProgramCache]: Analyzing trace with hash 900264009, now seen corresponding path program 32 times [2021-12-06 20:13:13,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:13:13,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009392328] [2021-12-06 20:13:13,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:13,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:13:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:14,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 852 proven. 449 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:13:14,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:13:14,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009392328] [2021-12-06 20:13:14,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009392328] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:13:14,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822063313] [2021-12-06 20:13:14,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:13:14,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:13:14,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:13:14,892 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:13:14,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-06 20:13:14,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:13:14,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:13:14,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 109 conjunts are in the unsatisfiable core [2021-12-06 20:13:14,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:13:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:13:16,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:13:20,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:13:20,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822063313] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:13:20,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:13:20,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 138 [2021-12-06 20:13:20,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448831178] [2021-12-06 20:13:20,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:13:20,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2021-12-06 20:13:20,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:13:20,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2021-12-06 20:13:20,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2715, Invalid=16191, Unknown=0, NotChecked=0, Total=18906 [2021-12-06 20:13:20,435 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 138 states, 138 states have (on average 2.130434782608696) internal successors, (294), 138 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:13:35,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:13:35,850 INFO L93 Difference]: Finished difference Result 302 states and 332 transitions. [2021-12-06 20:13:35,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-12-06 20:13:35,851 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.130434782608696) internal successors, (294), 138 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-12-06 20:13:35,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:13:35,852 INFO L225 Difference]: With dead ends: 302 [2021-12-06 20:13:35,852 INFO L226 Difference]: Without dead ends: 218 [2021-12-06 20:13:35,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 135 SyntacticMatches, 2 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16331 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=8324, Invalid=52932, Unknown=0, NotChecked=0, Total=61256 [2021-12-06 20:13:35,855 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 726 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 6592 mSolverCounterSat, 911 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 7503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 911 IncrementalHoareTripleChecker+Valid, 6592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:13:35,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [726 Valid, 843 Invalid, 7503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [911 Valid, 6592 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 20:13:35,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-06 20:13:36,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 141. [2021-12-06 20:13:36,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.2) internal successors, (168), 140 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:13:36,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 168 transitions. [2021-12-06 20:13:36,059 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 168 transitions. Word has length 109 [2021-12-06 20:13:36,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:13:36,059 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 168 transitions. [2021-12-06 20:13:36,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.130434782608696) internal successors, (294), 138 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:13:36,060 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 168 transitions. [2021-12-06 20:13:36,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-06 20:13:36,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:13:36,060 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:13:36,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-12-06 20:13:36,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-06 20:13:36,261 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:13:36,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:13:36,262 INFO L85 PathProgramCache]: Analyzing trace with hash -369219219, now seen corresponding path program 33 times [2021-12-06 20:13:36,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:13:36,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993183832] [2021-12-06 20:13:36,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:36,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:13:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:37,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 925 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:13:37,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:13:37,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993183832] [2021-12-06 20:13:37,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993183832] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:13:37,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358187420] [2021-12-06 20:13:37,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:13:37,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:13:37,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:13:37,954 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:13:37,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-06 20:13:38,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-12-06 20:13:38,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:13:38,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-06 20:13:38,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:13:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:13:40,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:13:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:13:45,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358187420] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:13:45,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:13:45,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 170 [2021-12-06 20:13:45,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913931567] [2021-12-06 20:13:45,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:13:45,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2021-12-06 20:13:45,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:13:45,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2021-12-06 20:13:45,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3347, Invalid=25383, Unknown=0, NotChecked=0, Total=28730 [2021-12-06 20:13:45,195 INFO L87 Difference]: Start difference. First operand 141 states and 168 transitions. Second operand has 170 states, 170 states have (on average 1.9529411764705882) internal successors, (332), 170 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:13:57,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:13:57,293 INFO L93 Difference]: Finished difference Result 232 states and 260 transitions. [2021-12-06 20:13:57,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-06 20:13:57,294 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 1.9529411764705882) internal successors, (332), 170 states have internal predecessors, (332), 0 states have call successors, (0), 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 113 [2021-12-06 20:13:57,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:13:57,295 INFO L225 Difference]: With dead ends: 232 [2021-12-06 20:13:57,295 INFO L226 Difference]: Without dead ends: 145 [2021-12-06 20:13:57,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13439 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=5953, Invalid=46259, Unknown=0, NotChecked=0, Total=52212 [2021-12-06 20:13:57,297 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 136 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 3272 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 3770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 3272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:13:57,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 145 Invalid, 3770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 3272 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 20:13:57,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-06 20:13:57,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 141. [2021-12-06 20:13:57,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.1928571428571428) internal successors, (167), 140 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:13:57,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 167 transitions. [2021-12-06 20:13:57,491 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 167 transitions. Word has length 113 [2021-12-06 20:13:57,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:13:57,491 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 167 transitions. [2021-12-06 20:13:57,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 1.9529411764705882) internal successors, (332), 170 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:13:57,491 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 167 transitions. [2021-12-06 20:13:57,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-06 20:13:57,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:13:57,492 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:13:57,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-06 20:13:57,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-06 20:13:57,693 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:13:57,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:13:57,694 INFO L85 PathProgramCache]: Analyzing trace with hash -618326347, now seen corresponding path program 34 times [2021-12-06 20:13:57,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:13:57,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098918546] [2021-12-06 20:13:57,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:13:57,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:13:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:13:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 351 proven. 1082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:13:58,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:13:58,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098918546] [2021-12-06 20:13:58,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098918546] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:13:58,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374408507] [2021-12-06 20:13:58,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:13:58,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:13:58,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:13:58,388 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:13:58,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-06 20:13:58,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:13:58,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:13:58,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-06 20:13:58,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:13:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 0 proven. 1433 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:13:59,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:14:00,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 0 proven. 1433 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:14:00,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374408507] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:14:00,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:14:00,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 115 [2021-12-06 20:14:00,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743170316] [2021-12-06 20:14:00,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:14:00,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2021-12-06 20:14:00,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:14:00,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-12-06 20:14:00,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2121, Invalid=10989, Unknown=0, NotChecked=0, Total=13110 [2021-12-06 20:14:00,200 INFO L87 Difference]: Start difference. First operand 141 states and 167 transitions. Second operand has 115 states, 115 states have (on average 1.5130434782608695) internal successors, (174), 115 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:14:02,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:14:02,024 INFO L93 Difference]: Finished difference Result 229 states and 256 transitions. [2021-12-06 20:14:02,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-06 20:14:02,024 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.5130434782608695) internal successors, (174), 115 states have internal predecessors, (174), 0 states have call successors, (0), 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 114 [2021-12-06 20:14:02,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:14:02,025 INFO L225 Difference]: With dead ends: 229 [2021-12-06 20:14:02,026 INFO L226 Difference]: Without dead ends: 227 [2021-12-06 20:14:02,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 168 SyntacticMatches, 3 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8176 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5099, Invalid=23971, Unknown=0, NotChecked=0, Total=29070 [2021-12-06 20:14:02,027 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 239 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 1970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 1497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:14:02,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 160 Invalid, 1970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [473 Valid, 1497 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:14:02,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-12-06 20:14:02,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 118. [2021-12-06 20:14:02,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:14:02,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2021-12-06 20:14:02,178 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 114 [2021-12-06 20:14:02,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:14:02,178 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2021-12-06 20:14:02,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.5130434782608695) internal successors, (174), 115 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:14:02,179 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2021-12-06 20:14:02,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-06 20:14:02,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:14:02,179 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:14:02,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-12-06 20:14:02,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:14:02,380 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:14:02,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:14:02,381 INFO L85 PathProgramCache]: Analyzing trace with hash 559354313, now seen corresponding path program 35 times [2021-12-06 20:14:02,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:14:02,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234038013] [2021-12-06 20:14:02,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:14:02,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:14:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 1001 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:14:04,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:14:04,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234038013] [2021-12-06 20:14:04,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234038013] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:14:04,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139308561] [2021-12-06 20:14:04,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:14:04,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:14:04,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:14:04,155 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:14:04,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-06 20:14:04,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2021-12-06 20:14:04,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:14:04,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 117 conjunts are in the unsatisfiable core [2021-12-06 20:14:04,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:14:05,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:14:05,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:14:10,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:14:10,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139308561] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:14:10,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:14:10,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 148 [2021-12-06 20:14:10,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424925259] [2021-12-06 20:14:10,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:14:10,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2021-12-06 20:14:10,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:14:10,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2021-12-06 20:14:10,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3118, Invalid=18638, Unknown=0, NotChecked=0, Total=21756 [2021-12-06 20:14:10,172 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 148 states, 148 states have (on average 2.135135135135135) internal successors, (316), 148 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:14:28,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:14:28,224 INFO L93 Difference]: Finished difference Result 324 states and 356 transitions. [2021-12-06 20:14:28,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-12-06 20:14:28,225 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 2.135135135135135) internal successors, (316), 148 states have internal predecessors, (316), 0 states have call successors, (0), 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 117 [2021-12-06 20:14:28,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:14:28,226 INFO L225 Difference]: With dead ends: 324 [2021-12-06 20:14:28,226 INFO L226 Difference]: Without dead ends: 234 [2021-12-06 20:14:28,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18821 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=9547, Invalid=60943, Unknown=0, NotChecked=0, Total=70490 [2021-12-06 20:14:28,229 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 810 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 7794 mSolverCounterSat, 1065 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 8859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1065 IncrementalHoareTripleChecker+Valid, 7794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:14:28,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [810 Valid, 972 Invalid, 8859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1065 Valid, 7794 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-06 20:14:28,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-06 20:14:28,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 151. [2021-12-06 20:14:28,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.2) internal successors, (180), 150 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:14:28,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 180 transitions. [2021-12-06 20:14:28,465 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 180 transitions. Word has length 117 [2021-12-06 20:14:28,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:14:28,465 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 180 transitions. [2021-12-06 20:14:28,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 2.135135135135135) internal successors, (316), 148 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:14:28,466 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 180 transitions. [2021-12-06 20:14:28,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-06 20:14:28,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:14:28,466 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:14:28,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-06 20:14:28,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-06 20:14:28,668 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:14:28,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:14:28,669 INFO L85 PathProgramCache]: Analyzing trace with hash 430006253, now seen corresponding path program 36 times [2021-12-06 20:14:28,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:14:28,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078241891] [2021-12-06 20:14:28,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:14:28,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:14:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 1080 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:14:30,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:14:30,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078241891] [2021-12-06 20:14:30,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078241891] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:14:30,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348529411] [2021-12-06 20:14:30,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:14:30,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:14:30,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:14:30,502 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:14:30,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-06 20:14:30,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-12-06 20:14:30,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:14:30,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-06 20:14:30,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:14:33,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:14:33,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:14:38,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:14:38,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348529411] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:14:38,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:14:38,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 182 [2021-12-06 20:14:38,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850436553] [2021-12-06 20:14:38,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:14:38,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 182 states [2021-12-06 20:14:38,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:14:38,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2021-12-06 20:14:38,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3825, Invalid=29117, Unknown=0, NotChecked=0, Total=32942 [2021-12-06 20:14:38,563 INFO L87 Difference]: Start difference. First operand 151 states and 180 transitions. Second operand has 182 states, 182 states have (on average 1.956043956043956) internal successors, (356), 182 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:14:53,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:14:53,189 INFO L93 Difference]: Finished difference Result 248 states and 278 transitions. [2021-12-06 20:14:53,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-06 20:14:53,189 INFO L78 Accepts]: Start accepts. Automaton has has 182 states, 182 states have (on average 1.956043956043956) internal successors, (356), 182 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-12-06 20:14:53,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:14:53,190 INFO L225 Difference]: With dead ends: 248 [2021-12-06 20:14:53,190 INFO L226 Difference]: Without dead ends: 155 [2021-12-06 20:14:53,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15421 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=6795, Invalid=52985, Unknown=0, NotChecked=0, Total=59780 [2021-12-06 20:14:53,193 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 154 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 4396 mSolverCounterSat, 565 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 4961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 565 IncrementalHoareTripleChecker+Valid, 4396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:14:53,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 199 Invalid, 4961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [565 Valid, 4396 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 20:14:53,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-06 20:14:53,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2021-12-06 20:14:53,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.1933333333333334) internal successors, (179), 150 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:14:53,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 179 transitions. [2021-12-06 20:14:53,428 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 179 transitions. Word has length 121 [2021-12-06 20:14:53,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:14:53,428 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 179 transitions. [2021-12-06 20:14:53,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 182 states, 182 states have (on average 1.956043956043956) internal successors, (356), 182 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:14:53,428 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 179 transitions. [2021-12-06 20:14:53,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-06 20:14:53,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:14:53,429 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:14:53,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-12-06 20:14:53,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:14:53,630 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:14:53,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:14:53,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1832221387, now seen corresponding path program 37 times [2021-12-06 20:14:53,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:14:53,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029769769] [2021-12-06 20:14:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:14:53,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:14:53,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 406 proven. 1249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:14:54,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:14:54,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029769769] [2021-12-06 20:14:54,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029769769] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:14:54,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992208440] [2021-12-06 20:14:54,347 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:14:54,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:14:54,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:14:54,348 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:14:54,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-06 20:14:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:14:54,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-06 20:14:54,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:14:55,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 0 proven. 1655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:14:55,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:14:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 0 proven. 1655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:14:56,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992208440] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:14:56,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:14:56,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 123 [2021-12-06 20:14:56,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646290436] [2021-12-06 20:14:56,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:14:56,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2021-12-06 20:14:56,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:14:56,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-12-06 20:14:56,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2422, Invalid=12584, Unknown=0, NotChecked=0, Total=15006 [2021-12-06 20:14:56,466 INFO L87 Difference]: Start difference. First operand 151 states and 179 transitions. Second operand has 123 states, 123 states have (on average 1.5121951219512195) internal successors, (186), 123 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:14:58,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:14:58,554 INFO L93 Difference]: Finished difference Result 245 states and 274 transitions. [2021-12-06 20:14:58,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-06 20:14:58,554 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.5121951219512195) internal successors, (186), 123 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-12-06 20:14:58,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:14:58,555 INFO L225 Difference]: With dead ends: 245 [2021-12-06 20:14:58,556 INFO L226 Difference]: Without dead ends: 243 [2021-12-06 20:14:58,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 180 SyntacticMatches, 3 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9391 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5823, Invalid=27483, Unknown=0, NotChecked=0, Total=33306 [2021-12-06 20:14:58,557 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 279 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 1613 mSolverCounterSat, 543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 2156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 543 IncrementalHoareTripleChecker+Valid, 1613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:14:58,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 154 Invalid, 2156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [543 Valid, 1613 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 20:14:58,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-06 20:14:58,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 126. [2021-12-06 20:14:58,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.016) internal successors, (127), 125 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:14:58,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2021-12-06 20:14:58,734 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 122 [2021-12-06 20:14:58,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:14:58,734 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2021-12-06 20:14:58,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.5121951219512195) internal successors, (186), 123 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:14:58,734 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2021-12-06 20:14:58,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-06 20:14:58,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:14:58,735 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:14:58,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-12-06 20:14:58,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:14:58,936 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:14:58,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:14:58,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1036849993, now seen corresponding path program 38 times [2021-12-06 20:14:58,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:14:58,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216314883] [2021-12-06 20:14:58,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:14:58,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:14:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:01,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 1162 proven. 579 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:15:01,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:15:01,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216314883] [2021-12-06 20:15:01,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216314883] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:15:01,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037163245] [2021-12-06 20:15:01,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:15:01,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:15:01,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:01,019 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:15:01,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-06 20:15:01,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:15:01,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:15:01,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 184 conjunts are in the unsatisfiable core [2021-12-06 20:15:01,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:15:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:15:04,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:15:09,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:15:09,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037163245] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:15:09,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:15:09,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 188 [2021-12-06 20:15:09,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225615502] [2021-12-06 20:15:09,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:15:09,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2021-12-06 20:15:09,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:15:09,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2021-12-06 20:15:09,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4567, Invalid=30589, Unknown=0, NotChecked=0, Total=35156 [2021-12-06 20:15:09,493 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand has 188 states, 188 states have (on average 1.9574468085106382) internal successors, (368), 188 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:15:31,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:15:31,826 INFO L93 Difference]: Finished difference Result 346 states and 380 transitions. [2021-12-06 20:15:31,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-12-06 20:15:31,826 INFO L78 Accepts]: Start accepts. Automaton has has 188 states, 188 states have (on average 1.9574468085106382) internal successors, (368), 188 states have internal predecessors, (368), 0 states have call successors, (0), 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 125 [2021-12-06 20:15:31,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:15:31,828 INFO L225 Difference]: With dead ends: 346 [2021-12-06 20:15:31,828 INFO L226 Difference]: Without dead ends: 250 [2021-12-06 20:15:31,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31280 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=12838, Invalid=86072, Unknown=0, NotChecked=0, Total=98910 [2021-12-06 20:15:31,832 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 911 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 9187 mSolverCounterSat, 1168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 1108 SdHoareTripleChecker+Invalid, 10355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1168 IncrementalHoareTripleChecker+Valid, 9187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:15:31,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [911 Valid, 1108 Invalid, 10355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1168 Valid, 9187 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-06 20:15:31,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-06 20:15:32,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 161. [2021-12-06 20:15:32,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.2) internal successors, (192), 160 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:15:32,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 192 transitions. [2021-12-06 20:15:32,139 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 192 transitions. Word has length 125 [2021-12-06 20:15:32,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:15:32,139 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 192 transitions. [2021-12-06 20:15:32,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 188 states, 188 states have (on average 1.9574468085106382) internal successors, (368), 188 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:15:32,140 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 192 transitions. [2021-12-06 20:15:32,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-06 20:15:32,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:15:32,140 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:15:32,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-12-06 20:15:32,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-12-06 20:15:32,341 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:15:32,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:15:32,342 INFO L85 PathProgramCache]: Analyzing trace with hash 900249197, now seen corresponding path program 39 times [2021-12-06 20:15:32,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:15:32,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144400021] [2021-12-06 20:15:32,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:15:32,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:15:32,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:15:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 1247 proven. 614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:15:34,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:15:34,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144400021] [2021-12-06 20:15:34,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144400021] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:15:34,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277357148] [2021-12-06 20:15:34,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:15:34,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:15:34,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:15:34,416 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:15:34,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-06 20:15:34,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2021-12-06 20:15:34,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:15:34,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-06 20:15:34,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:15:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:15:38,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:15:43,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:15:43,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277357148] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:15:43,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:15:43,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 194 [2021-12-06 20:15:43,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485348147] [2021-12-06 20:15:43,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:15:43,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2021-12-06 20:15:43,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:15:43,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2021-12-06 20:15:43,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4335, Invalid=33107, Unknown=0, NotChecked=0, Total=37442 [2021-12-06 20:15:43,565 INFO L87 Difference]: Start difference. First operand 161 states and 192 transitions. Second operand has 194 states, 194 states have (on average 1.958762886597938) internal successors, (380), 194 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:16:00,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:16:00,168 INFO L93 Difference]: Finished difference Result 264 states and 296 transitions. [2021-12-06 20:16:00,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-06 20:16:00,169 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 1.958762886597938) internal successors, (380), 194 states have internal predecessors, (380), 0 states have call successors, (0), 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 129 [2021-12-06 20:16:00,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:16:00,169 INFO L225 Difference]: With dead ends: 264 [2021-12-06 20:16:00,169 INFO L226 Difference]: Without dead ends: 165 [2021-12-06 20:16:00,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17539 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=7693, Invalid=60167, Unknown=0, NotChecked=0, Total=67860 [2021-12-06 20:16:00,172 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 159 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 4207 mSolverCounterSat, 641 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 4848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 641 IncrementalHoareTripleChecker+Valid, 4207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:16:00,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 177 Invalid, 4848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [641 Valid, 4207 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 20:16:00,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-06 20:16:00,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2021-12-06 20:16:00,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.19375) internal successors, (191), 160 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:16:00,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 191 transitions. [2021-12-06 20:16:00,448 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 191 transitions. Word has length 129 [2021-12-06 20:16:00,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:16:00,448 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 191 transitions. [2021-12-06 20:16:00,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 1.958762886597938) internal successors, (380), 194 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:16:00,449 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 191 transitions. [2021-12-06 20:16:00,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-06 20:16:00,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:16:00,449 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:16:00,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-12-06 20:16:00,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-06 20:16:00,650 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:16:00,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:16:00,652 INFO L85 PathProgramCache]: Analyzing trace with hash 219943861, now seen corresponding path program 40 times [2021-12-06 20:16:00,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:16:00,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314391586] [2021-12-06 20:16:00,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:16:00,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:16:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:01,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 465 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:16:01,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:16:01,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314391586] [2021-12-06 20:16:01,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314391586] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:16:01,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016258740] [2021-12-06 20:16:01,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:16:01,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:16:01,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:16:01,398 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:16:01,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-06 20:16:01,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:16:01,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:16:01,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-06 20:16:01,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:16:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 0 proven. 1893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:16:02,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:16:03,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 0 proven. 1893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:16:03,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016258740] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:16:03,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:16:03,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 131 [2021-12-06 20:16:03,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478521970] [2021-12-06 20:16:03,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:16:03,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-12-06 20:16:03,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:16:03,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-12-06 20:16:03,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2743, Invalid=14287, Unknown=0, NotChecked=0, Total=17030 [2021-12-06 20:16:03,573 INFO L87 Difference]: Start difference. First operand 161 states and 191 transitions. Second operand has 131 states, 131 states have (on average 1.5114503816793894) internal successors, (198), 131 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:16:05,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:16:05,805 INFO L93 Difference]: Finished difference Result 261 states and 292 transitions. [2021-12-06 20:16:05,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-06 20:16:05,805 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.5114503816793894) internal successors, (198), 131 states have internal predecessors, (198), 0 states have call successors, (0), 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 130 [2021-12-06 20:16:05,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:16:05,806 INFO L225 Difference]: With dead ends: 261 [2021-12-06 20:16:05,806 INFO L226 Difference]: Without dead ends: 259 [2021-12-06 20:16:05,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 192 SyntacticMatches, 3 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10690 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=6595, Invalid=31235, Unknown=0, NotChecked=0, Total=37830 [2021-12-06 20:16:05,808 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 266 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 1789 mSolverCounterSat, 555 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 555 IncrementalHoareTripleChecker+Valid, 1789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:16:05,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 177 Invalid, 2344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [555 Valid, 1789 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 20:16:05,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-12-06 20:16:06,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 134. [2021-12-06 20:16:06,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 133 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:16:06,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2021-12-06 20:16:06,009 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 130 [2021-12-06 20:16:06,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:16:06,009 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2021-12-06 20:16:06,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.5114503816793894) internal successors, (198), 131 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:16:06,010 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2021-12-06 20:16:06,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-06 20:16:06,010 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:16:06,010 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:16:06,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-12-06 20:16:06,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-06 20:16:06,211 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:16:06,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:16:06,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1767705399, now seen corresponding path program 41 times [2021-12-06 20:16:06,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:16:06,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590184961] [2021-12-06 20:16:06,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:16:06,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:16:06,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:08,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 1335 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:16:08,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:16:08,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590184961] [2021-12-06 20:16:08,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590184961] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:16:08,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785981245] [2021-12-06 20:16:08,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:16:08,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:16:08,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:16:08,396 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:16:08,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-06 20:16:08,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2021-12-06 20:16:08,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:16:08,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 133 conjunts are in the unsatisfiable core [2021-12-06 20:16:08,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:16:10,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:16:10,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:16:16,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:16:16,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785981245] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:16:16,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:16:16,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 168 [2021-12-06 20:16:16,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26389673] [2021-12-06 20:16:16,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:16:16,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 168 states [2021-12-06 20:16:16,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:16:16,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2021-12-06 20:16:16,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4008, Invalid=24048, Unknown=0, NotChecked=0, Total=28056 [2021-12-06 20:16:16,120 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand has 168 states, 168 states have (on average 2.142857142857143) internal successors, (360), 168 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:16:40,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:16:40,253 INFO L93 Difference]: Finished difference Result 368 states and 404 transitions. [2021-12-06 20:16:40,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2021-12-06 20:16:40,254 INFO L78 Accepts]: Start accepts. Automaton has has 168 states, 168 states have (on average 2.142857142857143) internal successors, (360), 168 states have internal predecessors, (360), 0 states have call successors, (0), 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 133 [2021-12-06 20:16:40,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:16:40,255 INFO L225 Difference]: With dead ends: 368 [2021-12-06 20:16:40,255 INFO L226 Difference]: Without dead ends: 266 [2021-12-06 20:16:40,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24329 ImplicationChecksByTransitivity, 27.3s TimeCoverageRelationStatistics Valid=12245, Invalid=78657, Unknown=0, NotChecked=0, Total=90902 [2021-12-06 20:16:40,259 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 1006 mSDsluCounter, 1203 mSDsCounter, 0 mSdLazyCounter, 9439 mSolverCounterSat, 1343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 10782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1343 IncrementalHoareTripleChecker+Valid, 9439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:16:40,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1006 Valid, 1209 Invalid, 10782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1343 Valid, 9439 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-06 20:16:40,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-06 20:16:40,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 171. [2021-12-06 20:16:40,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.2) internal successors, (204), 170 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:16:40,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 204 transitions. [2021-12-06 20:16:40,590 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 204 transitions. Word has length 133 [2021-12-06 20:16:40,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:16:40,590 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 204 transitions. [2021-12-06 20:16:40,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 168 states, 168 states have (on average 2.142857142857143) internal successors, (360), 168 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:16:40,590 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 204 transitions. [2021-12-06 20:16:40,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-06 20:16:40,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:16:40,591 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:16:40,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-12-06 20:16:40,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-06 20:16:40,792 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:16:40,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:16:40,792 INFO L85 PathProgramCache]: Analyzing trace with hash 863775981, now seen corresponding path program 42 times [2021-12-06 20:16:40,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:16:40,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825872703] [2021-12-06 20:16:40,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:16:40,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:16:40,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:16:43,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1426 proven. 687 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:16:43,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:16:43,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825872703] [2021-12-06 20:16:43,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825872703] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:16:43,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958146978] [2021-12-06 20:16:43,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:16:43,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:16:43,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:16:43,151 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:16:43,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-06 20:16:43,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2021-12-06 20:16:43,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:16:43,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 105 conjunts are in the unsatisfiable core [2021-12-06 20:16:43,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:16:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 0 proven. 2113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:16:47,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:16:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 0 proven. 2113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:16:53,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958146978] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:16:53,456 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:16:53,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 206 [2021-12-06 20:16:53,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120186598] [2021-12-06 20:16:53,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:16:53,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 206 states [2021-12-06 20:16:53,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:16:53,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2021-12-06 20:16:53,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4877, Invalid=37353, Unknown=0, NotChecked=0, Total=42230 [2021-12-06 20:16:53,459 INFO L87 Difference]: Start difference. First operand 171 states and 204 transitions. Second operand has 206 states, 206 states have (on average 1.9611650485436893) internal successors, (404), 206 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:12,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:17:12,972 INFO L93 Difference]: Finished difference Result 280 states and 314 transitions. [2021-12-06 20:17:12,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-06 20:17:12,973 INFO L78 Accepts]: Start accepts. Automaton has has 206 states, 206 states have (on average 1.9611650485436893) internal successors, (404), 206 states have internal predecessors, (404), 0 states have call successors, (0), 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 137 [2021-12-06 20:17:12,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:17:12,973 INFO L225 Difference]: With dead ends: 280 [2021-12-06 20:17:12,974 INFO L226 Difference]: Without dead ends: 175 [2021-12-06 20:17:12,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19793 ImplicationChecksByTransitivity, 27.7s TimeCoverageRelationStatistics Valid=8647, Invalid=67805, Unknown=0, NotChecked=0, Total=76452 [2021-12-06 20:17:12,977 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 149 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 4648 mSolverCounterSat, 743 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 5391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 743 IncrementalHoareTripleChecker+Valid, 4648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:17:12,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 174 Invalid, 5391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [743 Valid, 4648 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 20:17:12,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-06 20:17:13,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2021-12-06 20:17:13,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.1941176470588235) internal successors, (203), 170 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:13,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 203 transitions. [2021-12-06 20:17:13,302 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 203 transitions. Word has length 137 [2021-12-06 20:17:13,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:17:13,302 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 203 transitions. [2021-12-06 20:17:13,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 206 states, 206 states have (on average 1.9611650485436893) internal successors, (404), 206 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:13,303 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 203 transitions. [2021-12-06 20:17:13,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-06 20:17:13,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:17:13,303 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 32, 32, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:17:13,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-12-06 20:17:13,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:17:13,504 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:17:13,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:17:13,505 INFO L85 PathProgramCache]: Analyzing trace with hash 2004992565, now seen corresponding path program 43 times [2021-12-06 20:17:13,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:17:13,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435849217] [2021-12-06 20:17:13,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:17:13,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:17:13,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:14,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 528 proven. 1619 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:17:14,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:17:14,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435849217] [2021-12-06 20:17:14,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435849217] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:17:14,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921781509] [2021-12-06 20:17:14,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:17:14,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:17:14,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:17:14,384 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:17:14,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-06 20:17:14,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:14,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 105 conjunts are in the unsatisfiable core [2021-12-06 20:17:14,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:17:15,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:17:15,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:17:16,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:17:16,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921781509] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:17:16,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:17:16,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 139 [2021-12-06 20:17:16,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379085988] [2021-12-06 20:17:16,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:17:16,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2021-12-06 20:17:16,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:17:16,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2021-12-06 20:17:16,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3084, Invalid=16098, Unknown=0, NotChecked=0, Total=19182 [2021-12-06 20:17:16,822 INFO L87 Difference]: Start difference. First operand 171 states and 203 transitions. Second operand has 139 states, 139 states have (on average 1.5107913669064748) internal successors, (210), 139 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:19,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:17:19,404 INFO L93 Difference]: Finished difference Result 277 states and 310 transitions. [2021-12-06 20:17:19,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-06 20:17:19,404 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 1.5107913669064748) internal successors, (210), 139 states have internal predecessors, (210), 0 states have call successors, (0), 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 138 [2021-12-06 20:17:19,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:17:19,405 INFO L225 Difference]: With dead ends: 277 [2021-12-06 20:17:19,405 INFO L226 Difference]: Without dead ends: 275 [2021-12-06 20:17:19,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 204 SyntacticMatches, 3 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12073 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=7415, Invalid=35227, Unknown=0, NotChecked=0, Total=42642 [2021-12-06 20:17:19,408 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 379 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 1967 mSolverCounterSat, 646 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 646 IncrementalHoareTripleChecker+Valid, 1967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:17:19,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 177 Invalid, 2613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [646 Valid, 1967 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 20:17:19,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-12-06 20:17:19,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 142. [2021-12-06 20:17:19,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 141 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:19,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2021-12-06 20:17:19,645 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 138 [2021-12-06 20:17:19,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:17:19,645 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2021-12-06 20:17:19,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 1.5107913669064748) internal successors, (210), 139 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:19,645 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2021-12-06 20:17:19,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-06 20:17:19,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:17:19,646 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:17:19,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-12-06 20:17:19,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-06 20:17:19,847 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:17:19,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:17:19,848 INFO L85 PathProgramCache]: Analyzing trace with hash 628143689, now seen corresponding path program 44 times [2021-12-06 20:17:19,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:17:19,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140577829] [2021-12-06 20:17:19,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:17:19,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:17:19,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:17:22,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 1520 proven. 725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:17:22,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:17:22,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140577829] [2021-12-06 20:17:22,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140577829] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:17:22,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139703640] [2021-12-06 20:17:22,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:17:22,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:17:22,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:17:22,309 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:17:22,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-06 20:17:22,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:17:22,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:17:22,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 141 conjunts are in the unsatisfiable core [2021-12-06 20:17:22,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:17:24,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 0 proven. 2245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:17:24,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:17:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 0 proven. 2245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:17:30,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139703640] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:17:30,732 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:17:30,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 178 [2021-12-06 20:17:30,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90528419] [2021-12-06 20:17:30,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:17:30,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 178 states [2021-12-06 20:17:30,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:17:30,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2021-12-06 20:17:30,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4495, Invalid=27011, Unknown=0, NotChecked=0, Total=31506 [2021-12-06 20:17:30,735 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand has 178 states, 178 states have (on average 2.146067415730337) internal successors, (382), 178 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:58,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:17:58,348 INFO L93 Difference]: Finished difference Result 390 states and 428 transitions. [2021-12-06 20:17:58,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2021-12-06 20:17:58,348 INFO L78 Accepts]: Start accepts. Automaton has has 178 states, 178 states have (on average 2.146067415730337) internal successors, (382), 178 states have internal predecessors, (382), 0 states have call successors, (0), 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 141 [2021-12-06 20:17:58,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:17:58,350 INFO L225 Difference]: With dead ends: 390 [2021-12-06 20:17:58,350 INFO L226 Difference]: Without dead ends: 282 [2021-12-06 20:17:58,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 318 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27347 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=13720, Invalid=88360, Unknown=0, NotChecked=0, Total=102080 [2021-12-06 20:17:58,354 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 1090 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 10887 mSolverCounterSat, 1461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1090 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 12348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1461 IncrementalHoareTripleChecker+Valid, 10887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:17:58,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1090 Valid, 1355 Invalid, 12348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1461 Valid, 10887 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-12-06 20:17:58,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-12-06 20:17:58,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 181. [2021-12-06 20:17:58,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.2) internal successors, (216), 180 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:58,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 216 transitions. [2021-12-06 20:17:58,742 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 216 transitions. Word has length 141 [2021-12-06 20:17:58,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:17:58,742 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 216 transitions. [2021-12-06 20:17:58,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 178 states, 178 states have (on average 2.146067415730337) internal successors, (382), 178 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:17:58,743 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 216 transitions. [2021-12-06 20:17:58,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-06 20:17:58,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:17:58,743 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:17:58,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-12-06 20:17:58,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-06 20:17:58,945 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:17:58,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:17:58,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1518584685, now seen corresponding path program 45 times [2021-12-06 20:17:58,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:17:58,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953117448] [2021-12-06 20:17:58,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:17:58,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:17:58,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 1617 proven. 764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:18:01,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:18:01,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953117448] [2021-12-06 20:18:01,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953117448] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:18:01,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195495830] [2021-12-06 20:18:01,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:18:01,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:18:01,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:18:01,514 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:18:01,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-06 20:18:01,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2021-12-06 20:18:01,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:18:01,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 111 conjunts are in the unsatisfiable core [2021-12-06 20:18:01,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:18:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 0 proven. 2381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:18:06,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:18:12,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 0 proven. 2381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:18:12,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195495830] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:18:12,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:18:12,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 218 [2021-12-06 20:18:12,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087674624] [2021-12-06 20:18:12,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:18:12,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 218 states [2021-12-06 20:18:12,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:18:12,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 218 interpolants. [2021-12-06 20:18:12,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5451, Invalid=41855, Unknown=0, NotChecked=0, Total=47306 [2021-12-06 20:18:12,867 INFO L87 Difference]: Start difference. First operand 181 states and 216 transitions. Second operand has 218 states, 218 states have (on average 1.963302752293578) internal successors, (428), 218 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:35,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:18:35,576 INFO L93 Difference]: Finished difference Result 296 states and 332 transitions. [2021-12-06 20:18:35,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-06 20:18:35,576 INFO L78 Accepts]: Start accepts. Automaton has has 218 states, 218 states have (on average 1.963302752293578) internal successors, (428), 218 states have internal predecessors, (428), 0 states have call successors, (0), 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 145 [2021-12-06 20:18:35,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:18:35,577 INFO L225 Difference]: With dead ends: 296 [2021-12-06 20:18:35,577 INFO L226 Difference]: Without dead ends: 185 [2021-12-06 20:18:35,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22183 ImplicationChecksByTransitivity, 31.4s TimeCoverageRelationStatistics Valid=9657, Invalid=75899, Unknown=0, NotChecked=0, Total=85556 [2021-12-06 20:18:35,581 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 166 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 6132 mSolverCounterSat, 782 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 6914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 782 IncrementalHoareTripleChecker+Valid, 6132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:18:35,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 218 Invalid, 6914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [782 Valid, 6132 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-06 20:18:35,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-06 20:18:35,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 181. [2021-12-06 20:18:35,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.1944444444444444) internal successors, (215), 180 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:35,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 215 transitions. [2021-12-06 20:18:35,964 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 215 transitions. Word has length 145 [2021-12-06 20:18:35,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:18:35,965 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 215 transitions. [2021-12-06 20:18:35,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 218 states, 218 states have (on average 1.963302752293578) internal successors, (428), 218 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:35,965 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 215 transitions. [2021-12-06 20:18:35,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 20:18:35,965 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:18:35,966 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:18:35,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-12-06 20:18:36,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-06 20:18:36,167 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:18:36,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:18:36,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1365479605, now seen corresponding path program 46 times [2021-12-06 20:18:36,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:18:36,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251080422] [2021-12-06 20:18:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:18:36,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:18:36,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2417 backedges. 595 proven. 1822 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:18:37,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:18:37,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251080422] [2021-12-06 20:18:37,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251080422] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:18:37,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748604374] [2021-12-06 20:18:37,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:18:37,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:18:37,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:18:37,203 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:18:37,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-06 20:18:37,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:18:37,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:18:37,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 111 conjunts are in the unsatisfiable core [2021-12-06 20:18:37,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:18:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2417 backedges. 0 proven. 2417 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:18:38,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:18:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2417 backedges. 0 proven. 2417 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:18:40,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748604374] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:18:40,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:18:40,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 147 [2021-12-06 20:18:40,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697802706] [2021-12-06 20:18:40,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:18:40,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2021-12-06 20:18:40,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:18:40,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2021-12-06 20:18:40,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3445, Invalid=18017, Unknown=0, NotChecked=0, Total=21462 [2021-12-06 20:18:40,125 INFO L87 Difference]: Start difference. First operand 181 states and 215 transitions. Second operand has 147 states, 147 states have (on average 1.510204081632653) internal successors, (222), 147 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:43,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:18:43,122 INFO L93 Difference]: Finished difference Result 293 states and 328 transitions. [2021-12-06 20:18:43,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-06 20:18:43,122 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 1.510204081632653) internal successors, (222), 147 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-12-06 20:18:43,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:18:43,124 INFO L225 Difference]: With dead ends: 293 [2021-12-06 20:18:43,124 INFO L226 Difference]: Without dead ends: 291 [2021-12-06 20:18:43,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 216 SyntacticMatches, 3 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13540 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=8283, Invalid=39459, Unknown=0, NotChecked=0, Total=47742 [2021-12-06 20:18:43,126 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 298 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 2110 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 2712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 2110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:18:43,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 173 Invalid, 2712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 2110 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 20:18:43,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-12-06 20:18:43,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 150. [2021-12-06 20:18:43,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0134228187919463) internal successors, (151), 149 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:43,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2021-12-06 20:18:43,391 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 146 [2021-12-06 20:18:43,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:18:43,392 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2021-12-06 20:18:43,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 1.510204081632653) internal successors, (222), 147 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:18:43,392 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2021-12-06 20:18:43,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-06 20:18:43,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:18:43,392 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:18:43,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-12-06 20:18:43,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:18:43,594 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:18:43,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:18:43,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1372477385, now seen corresponding path program 47 times [2021-12-06 20:18:43,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:18:43,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492264881] [2021-12-06 20:18:43,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:18:43,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:18:43,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:18:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 1717 proven. 804 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:18:46,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:18:46,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492264881] [2021-12-06 20:18:46,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492264881] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:18:46,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732536883] [2021-12-06 20:18:46,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:18:46,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:18:46,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:18:46,412 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:18:46,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-06 20:18:46,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-12-06 20:18:46,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:18:46,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 149 conjunts are in the unsatisfiable core [2021-12-06 20:18:46,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:18:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 0 proven. 2521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:18:49,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:18:55,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 0 proven. 2521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:18:55,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732536883] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:18:55,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:18:55,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 188 [2021-12-06 20:18:55,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715017460] [2021-12-06 20:18:55,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:18:55,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2021-12-06 20:18:55,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:18:55,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2021-12-06 20:18:55,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5010, Invalid=30146, Unknown=0, NotChecked=0, Total=35156 [2021-12-06 20:18:55,886 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand has 188 states, 188 states have (on average 2.148936170212766) internal successors, (404), 188 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:27,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:19:27,508 INFO L93 Difference]: Finished difference Result 412 states and 452 transitions. [2021-12-06 20:19:27,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2021-12-06 20:19:27,509 INFO L78 Accepts]: Start accepts. Automaton has has 188 states, 188 states have (on average 2.148936170212766) internal successors, (404), 188 states have internal predecessors, (404), 0 states have call successors, (0), 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 149 [2021-12-06 20:19:27,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:19:27,510 INFO L225 Difference]: With dead ends: 412 [2021-12-06 20:19:27,510 INFO L226 Difference]: Without dead ends: 298 [2021-12-06 20:19:27,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 185 SyntacticMatches, 2 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30541 ImplicationChecksByTransitivity, 35.3s TimeCoverageRelationStatistics Valid=15279, Invalid=98627, Unknown=0, NotChecked=0, Total=113906 [2021-12-06 20:19:27,515 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 1207 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 12258 mSolverCounterSat, 1616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 1510 SdHoareTripleChecker+Invalid, 13874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1616 IncrementalHoareTripleChecker+Valid, 12258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:19:27,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1207 Valid, 1510 Invalid, 13874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1616 Valid, 12258 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-12-06 20:19:27,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-12-06 20:19:27,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 191. [2021-12-06 20:19:27,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.2) internal successors, (228), 190 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:27,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 228 transitions. [2021-12-06 20:19:27,969 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 228 transitions. Word has length 149 [2021-12-06 20:19:27,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:19:27,969 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 228 transitions. [2021-12-06 20:19:27,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 188 states, 188 states have (on average 2.148936170212766) internal successors, (404), 188 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:19:27,969 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 228 transitions. [2021-12-06 20:19:27,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-06 20:19:27,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:19:27,970 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:19:27,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-12-06 20:19:28,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-12-06 20:19:28,170 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:19:28,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:19:28,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1004045843, now seen corresponding path program 48 times [2021-12-06 20:19:28,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:19:28,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931835149] [2021-12-06 20:19:28,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:19:28,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:19:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:19:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 1820 proven. 845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:19:30,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:19:30,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931835149] [2021-12-06 20:19:30,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931835149] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:19:30,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125466448] [2021-12-06 20:19:30,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:19:30,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:19:30,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:19:30,954 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:19:30,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-06 20:19:31,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-12-06 20:19:31,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:19:31,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 117 conjunts are in the unsatisfiable core [2021-12-06 20:19:31,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:19:35,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 0 proven. 2665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:19:35,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:19:43,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 0 proven. 2665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:19:43,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125466448] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:19:43,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:19:43,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 230 [2021-12-06 20:19:43,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60334658] [2021-12-06 20:19:43,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:19:43,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 230 states [2021-12-06 20:19:43,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:19:43,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 230 interpolants. [2021-12-06 20:19:43,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6057, Invalid=46613, Unknown=0, NotChecked=0, Total=52670 [2021-12-06 20:19:43,559 INFO L87 Difference]: Start difference. First operand 191 states and 228 transitions. Second operand has 230 states, 230 states have (on average 1.9652173913043478) internal successors, (452), 230 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:09,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:20:09,627 INFO L93 Difference]: Finished difference Result 312 states and 350 transitions. [2021-12-06 20:20:09,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-12-06 20:20:09,628 INFO L78 Accepts]: Start accepts. Automaton has has 230 states, 230 states have (on average 1.9652173913043478) internal successors, (452), 230 states have internal predecessors, (452), 0 states have call successors, (0), 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 153 [2021-12-06 20:20:09,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:20:09,629 INFO L225 Difference]: With dead ends: 312 [2021-12-06 20:20:09,629 INFO L226 Difference]: Without dead ends: 195 [2021-12-06 20:20:09,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24709 ImplicationChecksByTransitivity, 35.9s TimeCoverageRelationStatistics Valid=10723, Invalid=84449, Unknown=0, NotChecked=0, Total=95172 [2021-12-06 20:20:09,633 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 163 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 5888 mSolverCounterSat, 868 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 6756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 868 IncrementalHoareTripleChecker+Valid, 5888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:20:09,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 204 Invalid, 6756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [868 Valid, 5888 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 20:20:09,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-06 20:20:10,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 191. [2021-12-06 20:20:10,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.194736842105263) internal successors, (227), 190 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:10,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 227 transitions. [2021-12-06 20:20:10,080 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 227 transitions. Word has length 153 [2021-12-06 20:20:10,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:20:10,080 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 227 transitions. [2021-12-06 20:20:10,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 230 states, 230 states have (on average 1.9652173913043478) internal successors, (452), 230 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:10,080 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 227 transitions. [2021-12-06 20:20:10,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-06 20:20:10,081 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:20:10,081 INFO L514 BasicCegarLoop]: trace histogram [38, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:20:10,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-12-06 20:20:10,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-12-06 20:20:10,282 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:20:10,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:20:10,283 INFO L85 PathProgramCache]: Analyzing trace with hash -332824779, now seen corresponding path program 49 times [2021-12-06 20:20:10,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:20:10,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848749178] [2021-12-06 20:20:10,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:20:10,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:20:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:11,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2703 backedges. 666 proven. 2037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:20:11,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:20:11,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848749178] [2021-12-06 20:20:11,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848749178] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:20:11,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798104205] [2021-12-06 20:20:11,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 20:20:11,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:20:11,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:20:11,342 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:20:11,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-06 20:20:11,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:11,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 117 conjunts are in the unsatisfiable core [2021-12-06 20:20:11,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:20:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2703 backedges. 0 proven. 2703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:20:12,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:20:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2703 backedges. 0 proven. 2703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:20:14,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798104205] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:20:14,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:20:14,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 155 [2021-12-06 20:20:14,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770714885] [2021-12-06 20:20:14,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:20:14,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2021-12-06 20:20:14,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:20:14,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2021-12-06 20:20:14,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3826, Invalid=20044, Unknown=0, NotChecked=0, Total=23870 [2021-12-06 20:20:14,356 INFO L87 Difference]: Start difference. First operand 191 states and 227 transitions. Second operand has 155 states, 155 states have (on average 1.5096774193548388) internal successors, (234), 155 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:17,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:20:17,629 INFO L93 Difference]: Finished difference Result 309 states and 346 transitions. [2021-12-06 20:20:17,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-12-06 20:20:17,629 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 1.5096774193548388) internal successors, (234), 155 states have internal predecessors, (234), 0 states have call successors, (0), 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 154 [2021-12-06 20:20:17,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:20:17,630 INFO L225 Difference]: With dead ends: 309 [2021-12-06 20:20:17,631 INFO L226 Difference]: Without dead ends: 307 [2021-12-06 20:20:17,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 228 SyntacticMatches, 3 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15091 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=9199, Invalid=43931, Unknown=0, NotChecked=0, Total=53130 [2021-12-06 20:20:17,633 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 349 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 2296 mSolverCounterSat, 710 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 3006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 710 IncrementalHoareTripleChecker+Valid, 2296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:20:17,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 190 Invalid, 3006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [710 Valid, 2296 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 20:20:17,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-12-06 20:20:17,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 158. [2021-12-06 20:20:17,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.0127388535031847) internal successors, (159), 157 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:17,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 159 transitions. [2021-12-06 20:20:17,980 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 159 transitions. Word has length 154 [2021-12-06 20:20:17,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:20:17,980 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 159 transitions. [2021-12-06 20:20:17,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 1.5096774193548388) internal successors, (234), 155 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:20:17,980 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 159 transitions. [2021-12-06 20:20:17,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 20:20:17,981 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:20:17,981 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:20:18,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-12-06 20:20:18,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:20:18,182 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:20:18,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:20:18,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1901320521, now seen corresponding path program 50 times [2021-12-06 20:20:18,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:20:18,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953148727] [2021-12-06 20:20:18,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:20:18,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:20:18,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:20:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 1926 proven. 887 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:20:21,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:20:21,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953148727] [2021-12-06 20:20:21,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953148727] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:20:21,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924728042] [2021-12-06 20:20:21,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:20:21,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:20:21,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:20:21,220 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:20:21,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-12-06 20:20:21,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:20:21,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:20:21,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 157 conjunts are in the unsatisfiable core [2021-12-06 20:20:21,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:20:24,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 0 proven. 2813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:20:24,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:20:31,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 0 proven. 2813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:20:31,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924728042] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:20:31,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:20:31,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80, 80] total 198 [2021-12-06 20:20:31,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364315064] [2021-12-06 20:20:31,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:20:31,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 198 states [2021-12-06 20:20:31,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:20:31,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2021-12-06 20:20:31,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5553, Invalid=33453, Unknown=0, NotChecked=0, Total=39006 [2021-12-06 20:20:31,505 INFO L87 Difference]: Start difference. First operand 158 states and 159 transitions. Second operand has 198 states, 198 states have (on average 2.1515151515151514) internal successors, (426), 198 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:21:07,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:21:07,033 INFO L93 Difference]: Finished difference Result 434 states and 476 transitions. [2021-12-06 20:21:07,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2021-12-06 20:21:07,033 INFO L78 Accepts]: Start accepts. Automaton has has 198 states, 198 states have (on average 2.1515151515151514) internal successors, (426), 198 states have internal predecessors, (426), 0 states have call successors, (0), 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 157 [2021-12-06 20:21:07,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:21:07,035 INFO L225 Difference]: With dead ends: 434 [2021-12-06 20:21:07,035 INFO L226 Difference]: Without dead ends: 314 [2021-12-06 20:21:07,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 195 SyntacticMatches, 2 SemanticMatches, 354 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33911 ImplicationChecksByTransitivity, 39.6s TimeCoverageRelationStatistics Valid=16922, Invalid=109458, Unknown=0, NotChecked=0, Total=126380 [2021-12-06 20:21:07,040 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 1312 mSDsluCounter, 1662 mSDsCounter, 0 mSdLazyCounter, 13147 mSolverCounterSat, 1781 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1312 SdHoareTripleChecker+Valid, 1668 SdHoareTripleChecker+Invalid, 14928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1781 IncrementalHoareTripleChecker+Valid, 13147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:21:07,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1312 Valid, 1668 Invalid, 14928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1781 Valid, 13147 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-06 20:21:07,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-12-06 20:21:07,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 201. [2021-12-06 20:21:07,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.2) internal successors, (240), 200 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) [2021-12-06 20:21:07,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 240 transitions. [2021-12-06 20:21:07,563 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 240 transitions. Word has length 157 [2021-12-06 20:21:07,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:21:07,563 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 240 transitions. [2021-12-06 20:21:07,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 198 states, 198 states have (on average 2.1515151515151514) internal successors, (426), 198 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:21:07,564 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 240 transitions. [2021-12-06 20:21:07,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-06 20:21:07,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:21:07,564 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:21:07,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-12-06 20:21:07,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:21:07,766 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:21:07,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:21:07,767 INFO L85 PathProgramCache]: Analyzing trace with hash -607170451, now seen corresponding path program 51 times [2021-12-06 20:21:07,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:21:07,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292135511] [2021-12-06 20:21:07,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:21:07,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:21:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:21:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 2035 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:21:10,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:21:10,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292135511] [2021-12-06 20:21:10,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292135511] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:21:10,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145988586] [2021-12-06 20:21:10,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:21:10,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:21:10,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:21:10,979 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:21:10,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-12-06 20:21:11,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2021-12-06 20:21:11,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:21:11,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 123 conjunts are in the unsatisfiable core [2021-12-06 20:21:11,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:21:16,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 0 proven. 2965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:21:16,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:21:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 0 proven. 2965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:21:24,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145988586] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:21:24,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:21:24,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 82, 82] total 242 [2021-12-06 20:21:24,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849248007] [2021-12-06 20:21:24,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:21:24,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 242 states [2021-12-06 20:21:24,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:21:24,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 242 interpolants. [2021-12-06 20:21:24,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6695, Invalid=51627, Unknown=0, NotChecked=0, Total=58322 [2021-12-06 20:21:24,913 INFO L87 Difference]: Start difference. First operand 201 states and 240 transitions. Second operand has 242 states, 242 states have (on average 1.9669421487603307) internal successors, (476), 242 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:21:53,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:21:53,832 INFO L93 Difference]: Finished difference Result 328 states and 368 transitions. [2021-12-06 20:21:53,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-12-06 20:21:53,832 INFO L78 Accepts]: Start accepts. Automaton has has 242 states, 242 states have (on average 1.9669421487603307) internal successors, (476), 242 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-12-06 20:21:53,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:21:53,833 INFO L225 Difference]: With dead ends: 328 [2021-12-06 20:21:53,833 INFO L226 Difference]: Without dead ends: 205 [2021-12-06 20:21:53,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27371 ImplicationChecksByTransitivity, 40.2s TimeCoverageRelationStatistics Valid=11845, Invalid=93455, Unknown=0, NotChecked=0, Total=105300 [2021-12-06 20:21:53,838 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 212 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 6368 mSolverCounterSat, 989 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 7357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 989 IncrementalHoareTripleChecker+Valid, 6368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:21:53,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 213 Invalid, 7357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [989 Valid, 6368 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 20:21:53,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-06 20:21:54,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 201. [2021-12-06 20:21:54,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.195) internal successors, (239), 200 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:21:54,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 239 transitions. [2021-12-06 20:21:54,364 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 239 transitions. Word has length 161 [2021-12-06 20:21:54,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:21:54,364 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 239 transitions. [2021-12-06 20:21:54,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 242 states, 242 states have (on average 1.9669421487603307) internal successors, (476), 242 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:21:54,364 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 239 transitions. [2021-12-06 20:21:54,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-06 20:21:54,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:21:54,365 INFO L514 BasicCegarLoop]: trace histogram [40, 39, 38, 38, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:21:54,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-12-06 20:21:54,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:21:54,566 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:21:54,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:21:54,567 INFO L85 PathProgramCache]: Analyzing trace with hash -348418635, now seen corresponding path program 52 times [2021-12-06 20:21:54,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:21:54,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745267634] [2021-12-06 20:21:54,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:21:54,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:21:54,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:21:55,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3005 backedges. 741 proven. 2264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:21:55,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:21:55,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745267634] [2021-12-06 20:21:55,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745267634] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:21:55,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788472018] [2021-12-06 20:21:55,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:21:55,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:21:55,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:21:55,762 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:21:55,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-12-06 20:21:55,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:21:55,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:21:55,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 123 conjunts are in the unsatisfiable core [2021-12-06 20:21:55,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:21:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3005 backedges. 0 proven. 3005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:21:57,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:21:59,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3005 backedges. 0 proven. 3005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:21:59,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788472018] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:21:59,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:21:59,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82, 82] total 163 [2021-12-06 20:21:59,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627759764] [2021-12-06 20:21:59,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:21:59,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2021-12-06 20:21:59,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:21:59,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2021-12-06 20:21:59,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4227, Invalid=22179, Unknown=0, NotChecked=0, Total=26406 [2021-12-06 20:21:59,072 INFO L87 Difference]: Start difference. First operand 201 states and 239 transitions. Second operand has 163 states, 163 states have (on average 1.50920245398773) internal successors, (246), 163 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:22:02,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:22:02,629 INFO L93 Difference]: Finished difference Result 325 states and 364 transitions. [2021-12-06 20:22:02,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-12-06 20:22:02,629 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 1.50920245398773) internal successors, (246), 163 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2021-12-06 20:22:02,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:22:02,631 INFO L225 Difference]: With dead ends: 325 [2021-12-06 20:22:02,631 INFO L226 Difference]: Without dead ends: 323 [2021-12-06 20:22:02,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 240 SyntacticMatches, 3 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16726 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=10163, Invalid=48643, Unknown=0, NotChecked=0, Total=58806 [2021-12-06 20:22:02,633 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 329 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 2549 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 3219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 2549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:22:02,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 190 Invalid, 3219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 2549 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 20:22:02,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-12-06 20:22:02,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 166. [2021-12-06 20:22:02,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.0121212121212122) internal successors, (167), 165 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:22:02,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2021-12-06 20:22:02,985 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 162 [2021-12-06 20:22:02,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:22:02,985 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2021-12-06 20:22:02,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 163 states have (on average 1.50920245398773) internal successors, (246), 163 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:22:02,986 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2021-12-06 20:22:02,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-06 20:22:02,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:22:02,986 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:22:03,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-12-06 20:22:03,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:22:03,187 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:22:03,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:22:03,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1201224393, now seen corresponding path program 53 times [2021-12-06 20:22:03,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:22:03,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344152121] [2021-12-06 20:22:03,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:22:03,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:22:03,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:22:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 2147 proven. 974 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:22:06,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:22:06,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344152121] [2021-12-06 20:22:06,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344152121] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:22:06,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066328288] [2021-12-06 20:22:06,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:22:06,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:22:06,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:22:06,379 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:22:06,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84899fd6-8ca9-468e-9762-9c8a4b57a08c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-12-06 20:22:06,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2021-12-06 20:22:06,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:22:06,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 165 conjunts are in the unsatisfiable core [2021-12-06 20:22:06,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:22:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 0 proven. 3121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:22:09,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:22:17,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 0 proven. 3121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:22:17,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066328288] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:22:17,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:22:17,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84, 84] total 208 [2021-12-06 20:22:17,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517516486] [2021-12-06 20:22:17,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:22:17,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 208 states [2021-12-06 20:22:17,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:22:17,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 208 interpolants. [2021-12-06 20:22:17,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6124, Invalid=36932, Unknown=0, NotChecked=0, Total=43056 [2021-12-06 20:22:17,874 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand has 208 states, 208 states have (on average 2.1538461538461537) internal successors, (448), 208 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)