./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU --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 ae51dc9203c351522c25ee3116b2cda704928bb61769972b6b90792bfdf57f19 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:01:17,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:01:17,254 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:01:17,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:01:17,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:01:17,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:01:17,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:01:17,350 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:01:17,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:01:17,361 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:01:17,362 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:01:17,365 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:01:17,366 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:01:17,369 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:01:17,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:01:17,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:01:17,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:01:17,383 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:01:17,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:01:17,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:01:17,401 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:01:17,404 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:01:17,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:01:17,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:01:17,414 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:01:17,415 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:01:17,415 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:01:17,418 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:01:17,419 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:01:17,421 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:01:17,421 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:01:17,422 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:01:17,425 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:01:17,426 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:01:17,428 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:01:17,429 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:01:17,430 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:01:17,430 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:01:17,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:01:17,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:01:17,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:01:17,434 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 23:01:17,489 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:01:17,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:01:17,490 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:01:17,498 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:01:17,501 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:01:17,501 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:01:17,502 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:01:17,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:01:17,502 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:01:17,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:01:17,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:01:17,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:01:17,505 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:01:17,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:01:17,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:01:17,506 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:01:17,506 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:01:17,506 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:01:17,507 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:01:17,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:01:17,507 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:01:17,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:01:17,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:01:17,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:01:17,508 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:01:17,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:01:17,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:01:17,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:01:17,510 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:01:17,512 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:01:17,512 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:01:17,513 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:01:17,513 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_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ae51dc9203c351522c25ee3116b2cda704928bb61769972b6b90792bfdf57f19 [2021-11-02 23:01:17,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:01:17,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:01:17,954 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:01:17,955 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:01:17,956 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:01:17,957 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c [2021-11-02 23:01:18,042 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/data/462213003/286d154781674de9b93d4a494dbeb4a8/FLAG87b35a1d4 [2021-11-02 23:01:18,610 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:01:18,610 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c [2021-11-02 23:01:18,625 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/data/462213003/286d154781674de9b93d4a494dbeb4a8/FLAG87b35a1d4 [2021-11-02 23:01:18,956 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/data/462213003/286d154781674de9b93d4a494dbeb4a8 [2021-11-02 23:01:18,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:01:18,961 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:01:18,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:01:18,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:01:18,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:01:18,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:01:18" (1/1) ... [2021-11-02 23:01:18,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25ffbea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:01:18, skipping insertion in model container [2021-11-02 23:01:18,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:01:18" (1/1) ... [2021-11-02 23:01:18,990 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:01:19,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:01:19,232 WARN L228 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_b069e67f-0515-40b6-a1f4-cc26887357f1/sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c[318,331] [2021-11-02 23:01:19,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:01:19,270 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:01:19,288 WARN L228 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_b069e67f-0515-40b6-a1f4-cc26887357f1/sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c[318,331] [2021-11-02 23:01:19,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:01:19,313 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:01:19,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:01:19 WrapperNode [2021-11-02 23:01:19,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:01:19,315 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:01:19,315 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:01:19,316 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:01:19,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:01:19" (1/1) ... [2021-11-02 23:01:19,332 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:01:19" (1/1) ... [2021-11-02 23:01:19,351 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:01:19,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:01:19,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:01:19,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:01:19,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:01:19" (1/1) ... [2021-11-02 23:01:19,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:01:19" (1/1) ... [2021-11-02 23:01:19,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:01:19" (1/1) ... [2021-11-02 23:01:19,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:01:19" (1/1) ... [2021-11-02 23:01:19,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:01:19" (1/1) ... [2021-11-02 23:01:19,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:01:19" (1/1) ... [2021-11-02 23:01:19,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:01:19" (1/1) ... [2021-11-02 23:01:19,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:01:19,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:01:19,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:01:19,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:01:19,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:01:19" (1/1) ... [2021-11-02 23:01:19,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:01:19,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:19,408 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:01:19,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:01:19,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:01:19,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:01:19,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:01:19,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:01:19,715 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:01:19,715 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-02 23:01:19,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:01:19 BoogieIcfgContainer [2021-11-02 23:01:19,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:01:19,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:01:19,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:01:19,737 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:01:19,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:01:18" (1/3) ... [2021-11-02 23:01:19,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b39ccb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:01:19, skipping insertion in model container [2021-11-02 23:01:19,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:01:19" (2/3) ... [2021-11-02 23:01:19,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b39ccb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:01:19, skipping insertion in model container [2021-11-02 23:01:19,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:01:19" (3/3) ... [2021-11-02 23:01:19,741 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_7.c [2021-11-02 23:01:19,753 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:01:19,753 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 23:01:19,848 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:01:19,857 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 [2021-11-02 23:01:19,858 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 23:01:19,875 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:19,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-02 23:01:19,882 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:19,882 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:19,883 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:19,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:19,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1818421976, now seen corresponding path program 1 times [2021-11-02 23:01:19,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:19,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60149082] [2021-11-02 23:01:19,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:19,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:20,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:20,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:20,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60149082] [2021-11-02 23:01:20,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60149082] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:01:20,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:01:20,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 23:01:20,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590824459] [2021-11-02 23:01:20,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 23:01:20,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:20,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 23:01:20,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 23:01:20,113 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 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 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:20,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:20,130 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2021-11-02 23:01:20,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 23:01:20,132 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-02 23:01:20,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:20,142 INFO L225 Difference]: With dead ends: 22 [2021-11-02 23:01:20,142 INFO L226 Difference]: Without dead ends: 9 [2021-11-02 23:01:20,146 INFO L786 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 [2021-11-02 23:01:20,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-02 23:01:20,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-02 23:01:20,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 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) [2021-11-02 23:01:20,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2021-11-02 23:01:20,183 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2021-11-02 23:01:20,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:20,183 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2021-11-02 23:01:20,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:20,184 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2021-11-02 23:01:20,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-02 23:01:20,185 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:20,185 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:20,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 23:01:20,186 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:20,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:20,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1809186766, now seen corresponding path program 1 times [2021-11-02 23:01:20,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:20,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631933473] [2021-11-02 23:01:20,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:20,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:20,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:20,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:20,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:20,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631933473] [2021-11-02 23:01:20,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631933473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:01:20,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:01:20,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:01:20,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515021848] [2021-11-02 23:01:20,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:01:20,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:20,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:01:20,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:01:20,270 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:20,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:20,319 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2021-11-02 23:01:20,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:01:20,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-02 23:01:20,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:20,321 INFO L225 Difference]: With dead ends: 18 [2021-11-02 23:01:20,322 INFO L226 Difference]: Without dead ends: 11 [2021-11-02 23:01:20,323 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:01:20,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-02 23:01:20,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-02 23:01:20,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:20,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-11-02 23:01:20,329 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2021-11-02 23:01:20,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:20,331 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-11-02 23:01:20,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:20,332 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-11-02 23:01:20,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-02 23:01:20,333 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:20,333 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:20,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 23:01:20,334 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:20,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:20,338 INFO L85 PathProgramCache]: Analyzing trace with hash 576672011, now seen corresponding path program 1 times [2021-11-02 23:01:20,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:20,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26177068] [2021-11-02 23:01:20,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:20,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:20,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:20,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:01:20,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:20,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26177068] [2021-11-02 23:01:20,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26177068] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:01:20,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:01:20,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:01:20,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838386111] [2021-11-02 23:01:20,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:01:20,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:20,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:01:20,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:01:20,450 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:20,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:20,467 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-11-02 23:01:20,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:01:20,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 [2021-11-02 23:01:20,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:20,469 INFO L225 Difference]: With dead ends: 16 [2021-11-02 23:01:20,469 INFO L226 Difference]: Without dead ends: 12 [2021-11-02 23:01:20,470 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:01:20,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-02 23:01:20,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-02 23:01:20,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:20,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-11-02 23:01:20,479 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2021-11-02 23:01:20,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:20,479 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-11-02 23:01:20,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:20,480 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-11-02 23:01:20,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 23:01:20,481 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:20,482 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:20,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 23:01:20,483 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:20,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:20,485 INFO L85 PathProgramCache]: Analyzing trace with hash 698628545, now seen corresponding path program 1 times [2021-11-02 23:01:20,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:20,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127955786] [2021-11-02 23:01:20,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:20,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:01:20,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:20,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127955786] [2021-11-02 23:01:20,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127955786] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:20,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703200910] [2021-11-02 23:01:20,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:20,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:20,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:20,557 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:20,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 23:01:20,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:20,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:01:20,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:01:20,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703200910] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:20,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:20,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-02 23:01:20,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939798825] [2021-11-02 23:01:20,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:01:20,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:20,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:01:20,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:01:20,766 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:20,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:20,805 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2021-11-02 23:01:20,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:01:20,806 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 10 [2021-11-02 23:01:20,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:20,807 INFO L225 Difference]: With dead ends: 22 [2021-11-02 23:01:20,807 INFO L226 Difference]: Without dead ends: 14 [2021-11-02 23:01:20,808 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:01:20,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-02 23:01:20,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-02 23:01:20,811 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) [2021-11-02 23:01:20,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-02 23:01:20,814 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2021-11-02 23:01:20,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:20,815 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-02 23:01:20,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:20,816 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-02 23:01:20,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 23:01:20,819 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:20,819 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:20,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:21,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:21,043 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:21,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:21,044 INFO L85 PathProgramCache]: Analyzing trace with hash 526975844, now seen corresponding path program 2 times [2021-11-02 23:01:21,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:21,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230553282] [2021-11-02 23:01:21,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:21,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:21,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:01:21,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:21,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230553282] [2021-11-02 23:01:21,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230553282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:01:21,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:01:21,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:01:21,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163894463] [2021-11-02 23:01:21,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:01:21,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:21,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:01:21,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:01:21,129 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-11-02 23:01:21,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:21,161 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-11-02 23:01:21,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:01:21,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 12 [2021-11-02 23:01:21,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:21,164 INFO L225 Difference]: With dead ends: 22 [2021-11-02 23:01:21,164 INFO L226 Difference]: Without dead ends: 16 [2021-11-02 23:01:21,165 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:01:21,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-02 23:01:21,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-11-02 23:01:21,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:21,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-02 23:01:21,205 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2021-11-02 23:01:21,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:21,207 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-02 23:01:21,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-11-02 23:01:21,208 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-02 23:01:21,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-02 23:01:21,211 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:21,211 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:21,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 23:01:21,212 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:21,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:21,213 INFO L85 PathProgramCache]: Analyzing trace with hash 552494793, now seen corresponding path program 1 times [2021-11-02 23:01:21,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:21,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976640361] [2021-11-02 23:01:21,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:21,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:01:21,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:21,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976640361] [2021-11-02 23:01:21,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976640361] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:21,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205837857] [2021-11-02 23:01:21,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:21,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:21,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:21,318 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:21,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 23:01:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:21,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 23:01:21,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:01:21,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205837857] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:21,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:21,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-02 23:01:21,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596181589] [2021-11-02 23:01:21,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:01:21,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:21,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:01:21,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:01:21,449 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:21,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:21,498 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2021-11-02 23:01:21,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:01:21,498 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 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 14 [2021-11-02 23:01:21,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:21,499 INFO L225 Difference]: With dead ends: 26 [2021-11-02 23:01:21,499 INFO L226 Difference]: Without dead ends: 17 [2021-11-02 23:01:21,500 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:01:21,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-02 23:01:21,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-02 23:01:21,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 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) [2021-11-02 23:01:21,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-02 23:01:21,504 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2021-11-02 23:01:21,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:21,505 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-02 23:01:21,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:21,505 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-02 23:01:21,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 23:01:21,506 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:21,506 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:21,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:21,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:21,707 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:21,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:21,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1373657364, now seen corresponding path program 2 times [2021-11-02 23:01:21,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:21,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370804401] [2021-11-02 23:01:21,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:21,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:21,810 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:01:21,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:21,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370804401] [2021-11-02 23:01:21,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370804401] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:21,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957879339] [2021-11-02 23:01:21,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:01:21,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:21,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:21,814 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:21,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 23:01:21,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:01:21,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:21,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:01:21,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:22,010 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:01:22,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957879339] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:22,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:22,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-02 23:01:22,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86563147] [2021-11-02 23:01:22,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:01:22,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:22,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:01:22,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:01:22,015 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2021-11-02 23:01:22,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:22,048 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-11-02 23:01:22,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:01:22,049 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 16 [2021-11-02 23:01:22,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:22,050 INFO L225 Difference]: With dead ends: 28 [2021-11-02 23:01:22,050 INFO L226 Difference]: Without dead ends: 19 [2021-11-02 23:01:22,051 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:01:22,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-02 23:01:22,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-02 23:01:22,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:22,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-02 23:01:22,070 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2021-11-02 23:01:22,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:22,071 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-02 23:01:22,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2021-11-02 23:01:22,071 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-02 23:01:22,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 23:01:22,072 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:22,072 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:22,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:22,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:22,287 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:22,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:22,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1274975665, now seen corresponding path program 3 times [2021-11-02 23:01:22,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:22,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620922297] [2021-11-02 23:01:22,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:22,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:22,363 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:01:22,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:22,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620922297] [2021-11-02 23:01:22,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620922297] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:22,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497116490] [2021-11-02 23:01:22,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:01:22,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:22,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:22,367 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:22,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 23:01:22,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-02 23:01:22,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:22,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 23:01:22,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:22,556 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-02 23:01:22,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497116490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:22,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:22,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-11-02 23:01:22,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966930490] [2021-11-02 23:01:22,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:01:22,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:22,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:01:22,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:01:22,567 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:22,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:22,706 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-11-02 23:01:22,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:01:22,714 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 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 18 [2021-11-02 23:01:22,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:22,716 INFO L225 Difference]: With dead ends: 33 [2021-11-02 23:01:22,716 INFO L226 Difference]: Without dead ends: 24 [2021-11-02 23:01:22,717 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:01:22,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-02 23:01:22,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-11-02 23:01:22,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 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) [2021-11-02 23:01:22,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-11-02 23:01:22,730 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 18 [2021-11-02 23:01:22,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:22,731 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-11-02 23:01:22,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:22,732 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-11-02 23:01:22,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 23:01:22,734 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:22,735 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:22,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:22,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-02 23:01:22,939 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:22,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:22,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1200989882, now seen corresponding path program 4 times [2021-11-02 23:01:22,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:22,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508960990] [2021-11-02 23:01:22,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:22,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:23,061 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:01:23,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:23,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508960990] [2021-11-02 23:01:23,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508960990] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:23,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021921246] [2021-11-02 23:01:23,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:01:23,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:23,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:23,079 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:23,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 23:01:23,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:01:23,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:23,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:01:23,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:23,238 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:01:23,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021921246] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:23,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:23,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-02 23:01:23,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720948956] [2021-11-02 23:01:23,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:01:23,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:23,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:01:23,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:01:23,241 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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) [2021-11-02 23:01:23,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:23,274 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-11-02 23:01:23,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:01:23,274 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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) Word has length 21 [2021-11-02 23:01:23,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:23,275 INFO L225 Difference]: With dead ends: 34 [2021-11-02 23:01:23,276 INFO L226 Difference]: Without dead ends: 24 [2021-11-02 23:01:23,276 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:01:23,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-02 23:01:23,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-02 23:01:23,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:23,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-11-02 23:01:23,281 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2021-11-02 23:01:23,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:23,281 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-11-02 23:01:23,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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) [2021-11-02 23:01:23,282 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-11-02 23:01:23,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 23:01:23,283 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:23,283 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:23,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:23,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:23,498 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:23,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:23,498 INFO L85 PathProgramCache]: Analyzing trace with hash 809863479, now seen corresponding path program 5 times [2021-11-02 23:01:23,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:23,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252334173] [2021-11-02 23:01:23,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:23,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:23,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:01:23,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:23,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252334173] [2021-11-02 23:01:23,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252334173] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:23,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261190706] [2021-11-02 23:01:23,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:01:23,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:23,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:23,615 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:23,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 23:01:23,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-02 23:01:23,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:23,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 23:01:23,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:01:23,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261190706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:23,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:23,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-02 23:01:23,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970102240] [2021-11-02 23:01:23,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:01:23,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:23,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:01:23,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:01:23,841 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:23,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:23,883 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-11-02 23:01:23,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:01:23,884 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 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 23 [2021-11-02 23:01:23,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:23,887 INFO L225 Difference]: With dead ends: 36 [2021-11-02 23:01:23,887 INFO L226 Difference]: Without dead ends: 26 [2021-11-02 23:01:23,888 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:01:23,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-02 23:01:23,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-02 23:01:23,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:23,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-11-02 23:01:23,898 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2021-11-02 23:01:23,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:23,898 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-11-02 23:01:23,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:23,899 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-11-02 23:01:23,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 23:01:23,900 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:23,900 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:23,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:24,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 23:01:24,107 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:24,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:24,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1400455052, now seen corresponding path program 6 times [2021-11-02 23:01:24,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:24,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619002796] [2021-11-02 23:01:24,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:24,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:01:24,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:24,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619002796] [2021-11-02 23:01:24,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619002796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:24,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426603942] [2021-11-02 23:01:24,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:01:24,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:24,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:24,235 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:24,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 23:01:24,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-02 23:01:24,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:24,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:01:24,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:24,467 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-02 23:01:24,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426603942] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:24,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:24,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2021-11-02 23:01:24,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59066495] [2021-11-02 23:01:24,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 23:01:24,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:24,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 23:01:24,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:01:24,474 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:24,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:24,641 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-11-02 23:01:24,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 23:01:24,642 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 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 [2021-11-02 23:01:24,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:24,645 INFO L225 Difference]: With dead ends: 41 [2021-11-02 23:01:24,646 INFO L226 Difference]: Without dead ends: 31 [2021-11-02 23:01:24,646 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:01:24,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-02 23:01:24,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-11-02 23:01:24,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:24,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-11-02 23:01:24,665 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2021-11-02 23:01:24,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:24,667 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-11-02 23:01:24,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:24,668 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-11-02 23:01:24,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 23:01:24,670 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:24,670 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:24,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:24,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-02 23:01:24,879 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:24,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:24,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1918510309, now seen corresponding path program 7 times [2021-11-02 23:01:24,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:24,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637350165] [2021-11-02 23:01:24,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:24,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:25,022 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 23:01:25,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:25,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637350165] [2021-11-02 23:01:25,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637350165] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:25,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429753352] [2021-11-02 23:01:25,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:01:25,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:25,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:25,032 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:25,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 23:01:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:25,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 23:01:25,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 23:01:25,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429753352] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:25,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:25,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-02 23:01:25,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149376403] [2021-11-02 23:01:25,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:01:25,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:25,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:01:25,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:01:25,263 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:25,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:25,317 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-11-02 23:01:25,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 23:01:25,317 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 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 28 [2021-11-02 23:01:25,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:25,318 INFO L225 Difference]: With dead ends: 42 [2021-11-02 23:01:25,318 INFO L226 Difference]: Without dead ends: 31 [2021-11-02 23:01:25,319 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:01:25,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-02 23:01:25,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-02 23:01:25,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:25,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-11-02 23:01:25,324 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2021-11-02 23:01:25,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:25,325 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-11-02 23:01:25,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:25,325 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-11-02 23:01:25,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 23:01:25,326 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:25,327 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:25,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:25,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:25,546 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:25,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:25,547 INFO L85 PathProgramCache]: Analyzing trace with hash -727277058, now seen corresponding path program 8 times [2021-11-02 23:01:25,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:25,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873238425] [2021-11-02 23:01:25,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:25,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:25,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 23:01:25,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:25,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873238425] [2021-11-02 23:01:25,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873238425] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:25,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592025344] [2021-11-02 23:01:25,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:01:25,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:25,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:25,673 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:25,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 23:01:25,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:01:25,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:25,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 23:01:25,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 23:01:25,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592025344] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:25,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:25,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-02 23:01:25,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231964480] [2021-11-02 23:01:25,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 23:01:25,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:25,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 23:01:25,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:01:25,962 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:26,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:26,024 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-11-02 23:01:26,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 23:01:26,027 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 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 30 [2021-11-02 23:01:26,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:26,028 INFO L225 Difference]: With dead ends: 44 [2021-11-02 23:01:26,028 INFO L226 Difference]: Without dead ends: 33 [2021-11-02 23:01:26,029 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:01:26,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-02 23:01:26,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-02 23:01:26,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 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) [2021-11-02 23:01:26,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-11-02 23:01:26,033 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2021-11-02 23:01:26,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:26,033 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-11-02 23:01:26,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:26,034 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-11-02 23:01:26,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 23:01:26,034 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:26,035 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:26,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:26,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-02 23:01:26,263 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:26,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:26,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1586576417, now seen corresponding path program 9 times [2021-11-02 23:01:26,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:26,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916960681] [2021-11-02 23:01:26,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:26,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:26,403 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 23:01:26,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:26,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916960681] [2021-11-02 23:01:26,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916960681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:26,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323530681] [2021-11-02 23:01:26,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:01:26,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:26,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:26,406 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:26,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 23:01:26,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 23:01:26,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:26,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:01:26,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-02 23:01:26,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323530681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:26,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:26,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2021-11-02 23:01:26,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684483592] [2021-11-02 23:01:26,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:01:26,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:26,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:01:26,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:01:26,720 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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) [2021-11-02 23:01:26,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:26,978 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-11-02 23:01:26,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 23:01:26,979 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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) Word has length 32 [2021-11-02 23:01:26,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:26,980 INFO L225 Difference]: With dead ends: 49 [2021-11-02 23:01:26,980 INFO L226 Difference]: Without dead ends: 38 [2021-11-02 23:01:26,981 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=285, Invalid=527, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:01:26,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-02 23:01:26,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-11-02 23:01:26,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:26,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-11-02 23:01:26,986 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 32 [2021-11-02 23:01:26,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:26,987 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-11-02 23:01:26,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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) [2021-11-02 23:01:26,987 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-11-02 23:01:26,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 23:01:26,989 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:26,989 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:27,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:27,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:27,205 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:27,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:27,205 INFO L85 PathProgramCache]: Analyzing trace with hash -275333016, now seen corresponding path program 10 times [2021-11-02 23:01:27,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:27,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115130683] [2021-11-02 23:01:27,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:27,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:27,390 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 23:01:27,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:27,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115130683] [2021-11-02 23:01:27,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115130683] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:27,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351024896] [2021-11-02 23:01:27,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:01:27,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:27,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:27,393 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:27,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 23:01:27,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:01:27,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:27,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 23:01:27,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 23:01:27,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351024896] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:27,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:27,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-02 23:01:27,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881140117] [2021-11-02 23:01:27,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 23:01:27,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:27,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 23:01:27,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:01:27,671 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-11-02 23:01:27,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:27,732 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-11-02 23:01:27,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 23:01:27,733 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) Word has length 35 [2021-11-02 23:01:27,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:27,733 INFO L225 Difference]: With dead ends: 50 [2021-11-02 23:01:27,734 INFO L226 Difference]: Without dead ends: 38 [2021-11-02 23:01:27,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:01:27,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-02 23:01:27,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-02 23:01:27,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:27,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-11-02 23:01:27,741 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2021-11-02 23:01:27,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:27,741 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-11-02 23:01:27,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-11-02 23:01:27,742 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-11-02 23:01:27,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-02 23:01:27,743 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:27,743 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:27,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:27,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 23:01:27,962 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:27,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:27,962 INFO L85 PathProgramCache]: Analyzing trace with hash 234226725, now seen corresponding path program 11 times [2021-11-02 23:01:27,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:27,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964653679] [2021-11-02 23:01:27,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:27,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:28,163 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 23:01:28,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:28,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964653679] [2021-11-02 23:01:28,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964653679] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:28,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641236008] [2021-11-02 23:01:28,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:01:28,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:28,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:28,165 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:28,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 23:01:28,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-02 23:01:28,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:28,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 23:01:28,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:28,480 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 23:01:28,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641236008] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:28,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:28,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-02 23:01:28,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588502702] [2021-11-02 23:01:28,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 23:01:28,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:28,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 23:01:28,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:01:28,484 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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) [2021-11-02 23:01:28,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:28,539 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2021-11-02 23:01:28,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 23:01:28,540 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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) Word has length 37 [2021-11-02 23:01:28,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:28,543 INFO L225 Difference]: With dead ends: 52 [2021-11-02 23:01:28,544 INFO L226 Difference]: Without dead ends: 40 [2021-11-02 23:01:28,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:01:28,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-02 23:01:28,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-02 23:01:28,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:28,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-11-02 23:01:28,558 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2021-11-02 23:01:28,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:28,558 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-11-02 23:01:28,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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) [2021-11-02 23:01:28,559 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-11-02 23:01:28,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-02 23:01:28,563 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:28,563 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:28,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:28,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 23:01:28,779 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:28,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:28,779 INFO L85 PathProgramCache]: Analyzing trace with hash 294866082, now seen corresponding path program 12 times [2021-11-02 23:01:28,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:28,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402522579] [2021-11-02 23:01:28,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:28,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 23:01:29,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:29,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402522579] [2021-11-02 23:01:29,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402522579] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:29,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106592605] [2021-11-02 23:01:29,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:01:29,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:29,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:29,013 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:29,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 23:01:29,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-02 23:01:29,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:29,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:01:29,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:29,381 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-02 23:01:29,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106592605] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:29,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:29,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 22 [2021-11-02 23:01:29,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914607581] [2021-11-02 23:01:29,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:01:29,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:29,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:01:29,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:01:29,383 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:29,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:29,652 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-11-02 23:01:29,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 23:01:29,652 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 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 39 [2021-11-02 23:01:29,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:29,653 INFO L225 Difference]: With dead ends: 57 [2021-11-02 23:01:29,653 INFO L226 Difference]: Without dead ends: 45 [2021-11-02 23:01:29,654 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=441, Invalid=819, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 23:01:29,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-02 23:01:29,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2021-11-02 23:01:29,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:29,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-11-02 23:01:29,660 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 39 [2021-11-02 23:01:29,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:29,661 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-11-02 23:01:29,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:29,661 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-11-02 23:01:29,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-02 23:01:29,662 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:29,662 INFO L513 BasicCegarLoop]: trace histogram [15, 14, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:29,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:29,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 23:01:29,863 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:29,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:29,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1121567891, now seen corresponding path program 13 times [2021-11-02 23:01:29,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:29,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45227679] [2021-11-02 23:01:29,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:29,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:29,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-02 23:01:30,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:30,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45227679] [2021-11-02 23:01:30,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45227679] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:30,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602422490] [2021-11-02 23:01:30,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:01:30,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:30,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:30,074 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:30,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 23:01:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:30,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 23:01:30,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-02 23:01:30,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602422490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:30,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:30,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-02 23:01:30,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308209929] [2021-11-02 23:01:30,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:01:30,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:30,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:01:30,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:01:30,462 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-11-02 23:01:30,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:30,541 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-11-02 23:01:30,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 23:01:30,541 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 42 [2021-11-02 23:01:30,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:30,542 INFO L225 Difference]: With dead ends: 58 [2021-11-02 23:01:30,542 INFO L226 Difference]: Without dead ends: 45 [2021-11-02 23:01:30,543 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:01:30,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-02 23:01:30,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-02 23:01:30,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:30,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-11-02 23:01:30,550 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2021-11-02 23:01:30,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:30,550 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-11-02 23:01:30,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-11-02 23:01:30,551 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-11-02 23:01:30,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 23:01:30,552 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:30,552 INFO L513 BasicCegarLoop]: trace histogram [16, 15, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:30,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:30,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 23:01:30,767 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:30,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:30,767 INFO L85 PathProgramCache]: Analyzing trace with hash 635681040, now seen corresponding path program 14 times [2021-11-02 23:01:30,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:30,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286225613] [2021-11-02 23:01:30,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:30,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-02 23:01:30,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:30,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286225613] [2021-11-02 23:01:30,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286225613] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:30,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914482070] [2021-11-02 23:01:30,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:01:30,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:30,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:30,999 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:31,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 23:01:31,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:01:31,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:31,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:01:31,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:31,392 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-02 23:01:31,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914482070] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:31,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:31,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-02 23:01:31,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412643566] [2021-11-02 23:01:31,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 23:01:31,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:31,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 23:01:31,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:01:31,395 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:31,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:31,459 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-11-02 23:01:31,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 23:01:31,460 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 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 44 [2021-11-02 23:01:31,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:31,460 INFO L225 Difference]: With dead ends: 60 [2021-11-02 23:01:31,460 INFO L226 Difference]: Without dead ends: 47 [2021-11-02 23:01:31,461 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:01:31,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-02 23:01:31,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-02 23:01:31,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:31,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-11-02 23:01:31,467 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2021-11-02 23:01:31,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:31,468 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-11-02 23:01:31,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:31,468 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-11-02 23:01:31,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-02 23:01:31,469 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:31,469 INFO L513 BasicCegarLoop]: trace histogram [17, 16, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:31,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:31,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:31,690 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:31,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:31,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1429756403, now seen corresponding path program 15 times [2021-11-02 23:01:31,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:31,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085552750] [2021-11-02 23:01:31,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:31,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:31,944 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-02 23:01:31,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:31,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085552750] [2021-11-02 23:01:31,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085552750] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:31,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867977016] [2021-11-02 23:01:31,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:01:31,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:31,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:31,955 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:31,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 23:01:32,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 23:01:32,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:32,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 23:01:32,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:32,336 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-11-02 23:01:32,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867977016] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:32,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:32,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 4] total 21 [2021-11-02 23:01:32,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671670523] [2021-11-02 23:01:32,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:01:32,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:32,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:01:32,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:01:32,340 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:32,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:32,426 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2021-11-02 23:01:32,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 23:01:32,427 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 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 46 [2021-11-02 23:01:32,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:32,430 INFO L225 Difference]: With dead ends: 65 [2021-11-02 23:01:32,430 INFO L226 Difference]: Without dead ends: 52 [2021-11-02 23:01:32,431 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:01:32,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-02 23:01:32,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-11-02 23:01:32,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.08) internal successors, (54), 50 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) [2021-11-02 23:01:32,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2021-11-02 23:01:32,449 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 46 [2021-11-02 23:01:32,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:32,449 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2021-11-02 23:01:32,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:32,450 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2021-11-02 23:01:32,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 23:01:32,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:32,450 INFO L513 BasicCegarLoop]: trace histogram [19, 17, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:32,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:32,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:32,667 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:32,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:32,667 INFO L85 PathProgramCache]: Analyzing trace with hash 527553147, now seen corresponding path program 16 times [2021-11-02 23:01:32,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:32,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294859212] [2021-11-02 23:01:32,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:32,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:32,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:32,922 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 23:01:32,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:32,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294859212] [2021-11-02 23:01:32,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294859212] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:32,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228724483] [2021-11-02 23:01:32,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:01:32,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:32,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:32,924 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:32,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 23:01:33,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:01:33,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:33,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 23:01:33,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:33,316 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 23:01:33,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228724483] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:33,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:33,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-02 23:01:33,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720822095] [2021-11-02 23:01:33,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:01:33,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:33,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:01:33,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:01:33,319 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:33,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:33,387 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2021-11-02 23:01:33,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 23:01:33,387 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 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 50 [2021-11-02 23:01:33,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:33,388 INFO L225 Difference]: With dead ends: 68 [2021-11-02 23:01:33,389 INFO L226 Difference]: Without dead ends: 53 [2021-11-02 23:01:33,390 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:01:33,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-02 23:01:33,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-02 23:01:33,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:33,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2021-11-02 23:01:33,396 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 50 [2021-11-02 23:01:33,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:33,396 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2021-11-02 23:01:33,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:33,397 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2021-11-02 23:01:33,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 23:01:33,398 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:33,398 INFO L513 BasicCegarLoop]: trace histogram [20, 18, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:33,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:33,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:33,623 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:33,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:33,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1291123998, now seen corresponding path program 17 times [2021-11-02 23:01:33,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:33,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389118862] [2021-11-02 23:01:33,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:33,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:33,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 23:01:33,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:33,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389118862] [2021-11-02 23:01:33,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389118862] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:33,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291225178] [2021-11-02 23:01:33,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:01:33,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:33,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:33,890 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:33,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 23:01:34,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-11-02 23:01:34,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:34,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 23:01:34,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:34,322 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 23:01:34,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291225178] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:34,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:34,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-02 23:01:34,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414097349] [2021-11-02 23:01:34,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:01:34,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:34,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:01:34,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:01:34,324 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:34,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:34,397 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2021-11-02 23:01:34,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 23:01:34,397 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 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 52 [2021-11-02 23:01:34,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:34,398 INFO L225 Difference]: With dead ends: 70 [2021-11-02 23:01:34,398 INFO L226 Difference]: Without dead ends: 55 [2021-11-02 23:01:34,399 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:01:34,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-02 23:01:34,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-11-02 23:01:34,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:34,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-11-02 23:01:34,405 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 52 [2021-11-02 23:01:34,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:34,405 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-11-02 23:01:34,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:34,406 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-11-02 23:01:34,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-02 23:01:34,406 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:34,407 INFO L513 BasicCegarLoop]: trace histogram [21, 19, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:34,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:34,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:34,623 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:34,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:34,623 INFO L85 PathProgramCache]: Analyzing trace with hash 643304193, now seen corresponding path program 18 times [2021-11-02 23:01:34,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:34,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913782550] [2021-11-02 23:01:34,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:34,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:34,917 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 23:01:34,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:34,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913782550] [2021-11-02 23:01:34,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913782550] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:34,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666282066] [2021-11-02 23:01:34,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:01:34,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:34,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:34,927 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:34,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 23:01:35,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-02 23:01:35,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:35,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 23:01:35,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 61 proven. 15 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-11-02 23:01:35,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666282066] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:35,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:35,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 29 [2021-11-02 23:01:35,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580092077] [2021-11-02 23:01:35,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 23:01:35,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:35,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 23:01:35,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:01:35,508 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 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) [2021-11-02 23:01:35,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:35,914 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2021-11-02 23:01:35,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 23:01:35,915 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 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 54 [2021-11-02 23:01:35,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:35,916 INFO L225 Difference]: With dead ends: 79 [2021-11-02 23:01:35,916 INFO L226 Difference]: Without dead ends: 64 [2021-11-02 23:01:35,917 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=806, Invalid=1546, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 23:01:35,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-02 23:01:35,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2021-11-02 23:01:35,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:35,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2021-11-02 23:01:35,922 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 54 [2021-11-02 23:01:35,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:35,925 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2021-11-02 23:01:35,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 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) [2021-11-02 23:01:35,925 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2021-11-02 23:01:35,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-02 23:01:35,926 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:35,926 INFO L513 BasicCegarLoop]: trace histogram [22, 20, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:35,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:36,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:36,139 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:36,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:36,139 INFO L85 PathProgramCache]: Analyzing trace with hash 852476360, now seen corresponding path program 19 times [2021-11-02 23:01:36,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:36,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967566731] [2021-11-02 23:01:36,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:36,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:36,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:36,461 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 63 proven. 420 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-02 23:01:36,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:36,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967566731] [2021-11-02 23:01:36,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967566731] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:36,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995488982] [2021-11-02 23:01:36,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:01:36,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:36,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:36,463 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:36,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 23:01:36,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:36,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 23:01:36,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:36,942 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 63 proven. 420 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-02 23:01:36,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995488982] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:36,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:36,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-02 23:01:36,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362469546] [2021-11-02 23:01:36,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:01:36,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:36,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:01:36,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:01:36,946 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:37,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:37,022 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2021-11-02 23:01:37,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 23:01:37,022 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-02 23:01:37,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:37,024 INFO L225 Difference]: With dead ends: 76 [2021-11-02 23:01:37,024 INFO L226 Difference]: Without dead ends: 60 [2021-11-02 23:01:37,028 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:01:37,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-02 23:01:37,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-02 23:01:37,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 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) [2021-11-02 23:01:37,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2021-11-02 23:01:37,039 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 57 [2021-11-02 23:01:37,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:37,040 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2021-11-02 23:01:37,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:37,040 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2021-11-02 23:01:37,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-02 23:01:37,042 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:37,042 INFO L513 BasicCegarLoop]: trace histogram [23, 21, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:37,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:37,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:37,255 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:37,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:37,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1906895301, now seen corresponding path program 20 times [2021-11-02 23:01:37,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:37,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251049280] [2021-11-02 23:01:37,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:37,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:37,607 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-02 23:01:37,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:37,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251049280] [2021-11-02 23:01:37,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251049280] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:37,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448288838] [2021-11-02 23:01:37,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:01:37,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:37,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:37,609 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:37,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 23:01:37,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:01:37,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:37,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 23:01:37,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:38,046 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-02 23:01:38,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448288838] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:38,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:38,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-02 23:01:38,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546098919] [2021-11-02 23:01:38,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 23:01:38,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:38,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 23:01:38,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:01:38,049 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:38,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:38,132 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2021-11-02 23:01:38,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 23:01:38,132 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-02 23:01:38,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:38,133 INFO L225 Difference]: With dead ends: 78 [2021-11-02 23:01:38,134 INFO L226 Difference]: Without dead ends: 62 [2021-11-02 23:01:38,134 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:01:38,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-02 23:01:38,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-02 23:01:38,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:38,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2021-11-02 23:01:38,141 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 59 [2021-11-02 23:01:38,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:38,141 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2021-11-02 23:01:38,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:38,142 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2021-11-02 23:01:38,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-02 23:01:38,142 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:38,143 INFO L513 BasicCegarLoop]: trace histogram [24, 22, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:38,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:38,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-02 23:01:38,363 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:38,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:38,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1591215746, now seen corresponding path program 21 times [2021-11-02 23:01:38,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:38,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978013015] [2021-11-02 23:01:38,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:38,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:38,753 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 69 proven. 506 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-02 23:01:38,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:38,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978013015] [2021-11-02 23:01:38,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978013015] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:38,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991511921] [2021-11-02 23:01:38,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:01:38,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:38,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:38,754 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:38,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 23:01:39,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 23:01:39,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:39,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 23:01:39,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:39,454 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 70 proven. 21 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-11-02 23:01:39,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991511921] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:39,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:39,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 10] total 33 [2021-11-02 23:01:39,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661992673] [2021-11-02 23:01:39,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-02 23:01:39,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:39,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-02 23:01:39,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:01:39,457 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:39,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:39,981 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2021-11-02 23:01:39,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-02 23:01:39,982 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 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 [2021-11-02 23:01:39,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:39,983 INFO L225 Difference]: With dead ends: 87 [2021-11-02 23:01:39,983 INFO L226 Difference]: Without dead ends: 71 [2021-11-02 23:01:39,984 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1057, Invalid=2023, Unknown=0, NotChecked=0, Total=3080 [2021-11-02 23:01:39,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-02 23:01:39,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2021-11-02 23:01:39,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:39,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2021-11-02 23:01:39,992 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 61 [2021-11-02 23:01:39,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:39,992 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2021-11-02 23:01:39,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:39,993 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2021-11-02 23:01:39,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 23:01:39,993 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:39,994 INFO L513 BasicCegarLoop]: trace histogram [25, 23, 7, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:40,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:40,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-02 23:01:40,207 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:40,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:40,207 INFO L85 PathProgramCache]: Analyzing trace with hash -641498803, now seen corresponding path program 22 times [2021-11-02 23:01:40,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:40,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697529792] [2021-11-02 23:01:40,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:40,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 72 proven. 552 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-02 23:01:40,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:40,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697529792] [2021-11-02 23:01:40,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697529792] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:40,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057361057] [2021-11-02 23:01:40,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:01:40,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:40,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:40,604 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:40,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-02 23:01:40,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:01:40,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:40,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 23:01:40,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:41,175 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 72 proven. 552 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-02 23:01:41,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057361057] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:41,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:41,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-11-02 23:01:41,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928046300] [2021-11-02 23:01:41,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 23:01:41,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:41,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 23:01:41,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:01:41,178 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:41,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:41,254 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2021-11-02 23:01:41,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 23:01:41,255 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 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 64 [2021-11-02 23:01:41,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:41,256 INFO L225 Difference]: With dead ends: 84 [2021-11-02 23:01:41,256 INFO L226 Difference]: Without dead ends: 67 [2021-11-02 23:01:41,257 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:01:41,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-02 23:01:41,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-11-02 23:01:41,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:41,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2021-11-02 23:01:41,263 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 64 [2021-11-02 23:01:41,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:41,263 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2021-11-02 23:01:41,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:41,264 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2021-11-02 23:01:41,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 23:01:41,264 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:41,265 INFO L513 BasicCegarLoop]: trace histogram [26, 24, 7, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:41,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:41,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-02 23:01:41,475 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:41,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:41,476 INFO L85 PathProgramCache]: Analyzing trace with hash -601238864, now seen corresponding path program 23 times [2021-11-02 23:01:41,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:41,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517654611] [2021-11-02 23:01:41,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:41,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:41,872 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 75 proven. 600 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-02 23:01:41,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:41,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517654611] [2021-11-02 23:01:41,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517654611] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:41,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429693813] [2021-11-02 23:01:41,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:01:41,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:41,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:41,874 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:41,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-02 23:01:42,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2021-11-02 23:01:42,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:42,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-02 23:01:42,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:42,461 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 75 proven. 600 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-02 23:01:42,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429693813] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:42,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:42,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-02 23:01:42,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746300828] [2021-11-02 23:01:42,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 23:01:42,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:42,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 23:01:42,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:01:42,463 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 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) [2021-11-02 23:01:42,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:42,572 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2021-11-02 23:01:42,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 23:01:42,573 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 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 66 [2021-11-02 23:01:42,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:42,574 INFO L225 Difference]: With dead ends: 86 [2021-11-02 23:01:42,574 INFO L226 Difference]: Without dead ends: 69 [2021-11-02 23:01:42,575 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:01:42,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-02 23:01:42,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-02 23:01:42,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:42,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-11-02 23:01:42,581 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 66 [2021-11-02 23:01:42,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:42,581 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-11-02 23:01:42,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 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) [2021-11-02 23:01:42,582 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-11-02 23:01:42,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-02 23:01:42,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:42,583 INFO L513 BasicCegarLoop]: trace histogram [27, 25, 7, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:42,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:42,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:42,811 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:42,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:42,811 INFO L85 PathProgramCache]: Analyzing trace with hash -566143149, now seen corresponding path program 24 times [2021-11-02 23:01:42,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:42,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927625935] [2021-11-02 23:01:42,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:42,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 78 proven. 650 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-02 23:01:43,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:43,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927625935] [2021-11-02 23:01:43,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927625935] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:43,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373860251] [2021-11-02 23:01:43,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:01:43,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:43,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:43,263 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:43,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-02 23:01:43,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-02 23:01:43,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:43,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 23:01:43,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 79 proven. 28 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2021-11-02 23:01:44,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373860251] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:44,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:44,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 11] total 37 [2021-11-02 23:01:44,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083985142] [2021-11-02 23:01:44,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-02 23:01:44,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:44,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-02 23:01:44,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=900, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 23:01:44,096 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 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) [2021-11-02 23:01:44,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:44,819 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2021-11-02 23:01:44,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-02 23:01:44,819 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 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) Word has length 68 [2021-11-02 23:01:44,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:44,820 INFO L225 Difference]: With dead ends: 95 [2021-11-02 23:01:44,821 INFO L226 Difference]: Without dead ends: 78 [2021-11-02 23:01:44,823 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1342, Invalid=2564, Unknown=0, NotChecked=0, Total=3906 [2021-11-02 23:01:44,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-02 23:01:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2021-11-02 23:01:44,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 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) [2021-11-02 23:01:44,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2021-11-02 23:01:44,832 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 68 [2021-11-02 23:01:44,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:44,832 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2021-11-02 23:01:44,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 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) [2021-11-02 23:01:44,833 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2021-11-02 23:01:44,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-02 23:01:44,834 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:44,834 INFO L513 BasicCegarLoop]: trace histogram [28, 26, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:44,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:45,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-02 23:01:45,043 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:45,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:45,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1490489590, now seen corresponding path program 25 times [2021-11-02 23:01:45,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:45,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878661040] [2021-11-02 23:01:45,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:45,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 81 proven. 702 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-02 23:01:45,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:45,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878661040] [2021-11-02 23:01:45,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878661040] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:45,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745443479] [2021-11-02 23:01:45,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:01:45,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:45,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:45,560 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:45,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-02 23:01:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:46,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-02 23:01:46,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:46,316 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 81 proven. 702 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-02 23:01:46,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745443479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:46,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:46,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-02 23:01:46,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119450466] [2021-11-02 23:01:46,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 23:01:46,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:46,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 23:01:46,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:01:46,325 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 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) [2021-11-02 23:01:46,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:46,422 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2021-11-02 23:01:46,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 23:01:46,423 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 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) Word has length 71 [2021-11-02 23:01:46,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:46,424 INFO L225 Difference]: With dead ends: 92 [2021-11-02 23:01:46,424 INFO L226 Difference]: Without dead ends: 74 [2021-11-02 23:01:46,427 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:01:46,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-02 23:01:46,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-02 23:01:46,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 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) [2021-11-02 23:01:46,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2021-11-02 23:01:46,433 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 71 [2021-11-02 23:01:46,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:46,434 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2021-11-02 23:01:46,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 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) [2021-11-02 23:01:46,434 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2021-11-02 23:01:46,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-02 23:01:46,435 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:46,436 INFO L513 BasicCegarLoop]: trace histogram [29, 27, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:46,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:46,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:46,659 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:46,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:46,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1660418611, now seen corresponding path program 26 times [2021-11-02 23:01:46,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:46,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932298049] [2021-11-02 23:01:46,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:46,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:46,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-02 23:01:47,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:47,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932298049] [2021-11-02 23:01:47,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932298049] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:47,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765964633] [2021-11-02 23:01:47,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:01:47,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:47,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:47,167 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:47,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-02 23:01:47,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:01:47,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:47,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 23:01:47,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:48,089 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-02 23:01:48,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765964633] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:48,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:48,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-11-02 23:01:48,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090717982] [2021-11-02 23:01:48,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 23:01:48,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:48,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 23:01:48,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:01:48,092 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 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) [2021-11-02 23:01:48,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:48,196 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2021-11-02 23:01:48,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 23:01:48,197 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 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) Word has length 73 [2021-11-02 23:01:48,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:48,198 INFO L225 Difference]: With dead ends: 94 [2021-11-02 23:01:48,198 INFO L226 Difference]: Without dead ends: 76 [2021-11-02 23:01:48,200 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:01:48,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-02 23:01:48,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-02 23:01:48,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 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) [2021-11-02 23:01:48,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2021-11-02 23:01:48,206 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 73 [2021-11-02 23:01:48,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:48,207 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2021-11-02 23:01:48,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 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) [2021-11-02 23:01:48,207 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2021-11-02 23:01:48,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-02 23:01:48,208 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:48,208 INFO L513 BasicCegarLoop]: trace histogram [30, 28, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:48,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:48,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:48,438 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:48,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:48,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1753450544, now seen corresponding path program 27 times [2021-11-02 23:01:48,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:48,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150587141] [2021-11-02 23:01:48,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:48,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 87 proven. 812 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-02 23:01:48,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:48,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150587141] [2021-11-02 23:01:48,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150587141] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:48,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976053066] [2021-11-02 23:01:48,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:01:48,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:48,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:48,984 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:49,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-02 23:01:49,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-02 23:01:49,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:49,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 23:01:49,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:50,027 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 88 proven. 36 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2021-11-02 23:01:50,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976053066] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:50,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:50,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 12] total 41 [2021-11-02 23:01:50,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574750913] [2021-11-02 23:01:50,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-02 23:01:50,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:50,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-02 23:01:50,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1110, Unknown=0, NotChecked=0, Total=1640 [2021-11-02 23:01:50,031 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 41 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:50,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:50,707 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2021-11-02 23:01:50,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-02 23:01:50,708 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 41 states have internal predecessors, (84), 0 states have call successors, (0), 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 75 [2021-11-02 23:01:50,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:50,709 INFO L225 Difference]: With dead ends: 103 [2021-11-02 23:01:50,709 INFO L226 Difference]: Without dead ends: 85 [2021-11-02 23:01:50,712 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1661, Invalid=3169, Unknown=0, NotChecked=0, Total=4830 [2021-11-02 23:01:50,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-02 23:01:50,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2021-11-02 23:01:50,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 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) [2021-11-02 23:01:50,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2021-11-02 23:01:50,719 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 75 [2021-11-02 23:01:50,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:50,719 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2021-11-02 23:01:50,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 41 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:50,720 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2021-11-02 23:01:50,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-02 23:01:50,721 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:50,721 INFO L513 BasicCegarLoop]: trace histogram [31, 29, 9, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:50,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:50,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-02 23:01:50,943 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:50,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:50,943 INFO L85 PathProgramCache]: Analyzing trace with hash -215532513, now seen corresponding path program 28 times [2021-11-02 23:01:50,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:50,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612534217] [2021-11-02 23:01:50,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:50,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:50,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:51,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 90 proven. 870 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-02 23:01:51,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:51,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612534217] [2021-11-02 23:01:51,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612534217] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:51,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937250431] [2021-11-02 23:01:51,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:01:51,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:51,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:51,535 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:51,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-02 23:01:52,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:01:52,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:52,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-02 23:01:52,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 90 proven. 870 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-02 23:01:52,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937250431] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:52,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:52,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-11-02 23:01:52,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474567219] [2021-11-02 23:01:52,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-02 23:01:52,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:52,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-02 23:01:52,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:01:52,444 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 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) [2021-11-02 23:01:52,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:52,541 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2021-11-02 23:01:52,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-02 23:01:52,542 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 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) Word has length 78 [2021-11-02 23:01:52,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:52,542 INFO L225 Difference]: With dead ends: 100 [2021-11-02 23:01:52,542 INFO L226 Difference]: Without dead ends: 81 [2021-11-02 23:01:52,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:01:52,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-02 23:01:52,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-11-02 23:01:52,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:52,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2021-11-02 23:01:52,551 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 78 [2021-11-02 23:01:52,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:52,552 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2021-11-02 23:01:52,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 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) [2021-11-02 23:01:52,553 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2021-11-02 23:01:52,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-02 23:01:52,555 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:52,556 INFO L513 BasicCegarLoop]: trace histogram [32, 30, 9, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:52,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:52,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-02 23:01:52,783 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:52,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:52,783 INFO L85 PathProgramCache]: Analyzing trace with hash -142220222, now seen corresponding path program 29 times [2021-11-02 23:01:52,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:52,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460684918] [2021-11-02 23:01:52,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:52,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-02 23:01:53,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:53,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460684918] [2021-11-02 23:01:53,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460684918] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:53,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454371599] [2021-11-02 23:01:53,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:01:53,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:53,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:53,303 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:53,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-02 23:01:53,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2021-11-02 23:01:53,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:53,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-02 23:01:53,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-02 23:01:54,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454371599] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:54,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:54,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-11-02 23:01:54,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673106162] [2021-11-02 23:01:54,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-02 23:01:54,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:54,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-02 23:01:54,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 23:01:54,154 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 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) [2021-11-02 23:01:54,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:54,264 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2021-11-02 23:01:54,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-02 23:01:54,265 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 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) Word has length 80 [2021-11-02 23:01:54,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:54,266 INFO L225 Difference]: With dead ends: 102 [2021-11-02 23:01:54,266 INFO L226 Difference]: Without dead ends: 83 [2021-11-02 23:01:54,267 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 23:01:54,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-02 23:01:54,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-11-02 23:01:54,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:54,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2021-11-02 23:01:54,274 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 80 [2021-11-02 23:01:54,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:54,275 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2021-11-02 23:01:54,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 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) [2021-11-02 23:01:54,275 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2021-11-02 23:01:54,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-02 23:01:54,276 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:54,276 INFO L513 BasicCegarLoop]: trace histogram [33, 31, 9, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:54,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:54,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-02 23:01:54,499 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:54,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:54,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1591414693, now seen corresponding path program 30 times [2021-11-02 23:01:54,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:54,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536904208] [2021-11-02 23:01:54,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:54,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:54,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:55,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 96 proven. 992 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-02 23:01:55,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:55,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536904208] [2021-11-02 23:01:55,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536904208] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:55,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420391686] [2021-11-02 23:01:55,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:01:55,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:55,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:55,105 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:55,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-02 23:01:55,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-02 23:01:55,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:55,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 23:01:55,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:56,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 97 proven. 45 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2021-11-02 23:01:56,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420391686] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:56,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:56,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 13] total 45 [2021-11-02 23:01:56,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889565561] [2021-11-02 23:01:56,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-02 23:01:56,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:56,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-02 23:01:56,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=1342, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 23:01:56,222 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:57,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:57,015 INFO L93 Difference]: Finished difference Result 111 states and 122 transitions. [2021-11-02 23:01:57,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-02 23:01:57,015 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 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 [2021-11-02 23:01:57,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:57,016 INFO L225 Difference]: With dead ends: 111 [2021-11-02 23:01:57,016 INFO L226 Difference]: Without dead ends: 92 [2021-11-02 23:01:57,019 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2014, Invalid=3838, Unknown=0, NotChecked=0, Total=5852 [2021-11-02 23:01:57,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-02 23:01:57,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2021-11-02 23:01:57,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:57,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2021-11-02 23:01:57,026 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 82 [2021-11-02 23:01:57,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:57,027 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2021-11-02 23:01:57,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:57,028 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2021-11-02 23:01:57,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-02 23:01:57,028 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:57,029 INFO L513 BasicCegarLoop]: trace histogram [34, 32, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:57,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-02 23:01:57,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-02 23:01:57,231 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:57,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:57,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1826898980, now seen corresponding path program 31 times [2021-11-02 23:01:57,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:57,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878368350] [2021-11-02 23:01:57,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:57,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:57,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1211 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-02 23:01:57,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:57,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878368350] [2021-11-02 23:01:57,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878368350] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:57,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109134648] [2021-11-02 23:01:57,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:01:57,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:57,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:57,814 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:57,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-02 23:01:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:58,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-02 23:01:58,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1211 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-02 23:01:58,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109134648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:58,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:58,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-11-02 23:01:58,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078112727] [2021-11-02 23:01:58,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-02 23:01:58,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:58,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-02 23:01:58,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 23:01:58,720 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 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) [2021-11-02 23:01:58,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:58,827 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2021-11-02 23:01:58,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-02 23:01:58,828 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 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) Word has length 85 [2021-11-02 23:01:58,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:58,830 INFO L225 Difference]: With dead ends: 108 [2021-11-02 23:01:58,830 INFO L226 Difference]: Without dead ends: 88 [2021-11-02 23:01:58,831 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 23:01:58,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-02 23:01:58,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-11-02 23:01:58,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 87 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:58,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2021-11-02 23:01:58,839 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 85 [2021-11-02 23:01:58,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:58,839 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2021-11-02 23:01:58,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 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) [2021-11-02 23:01:58,840 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2021-11-02 23:01:58,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-02 23:01:58,841 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:58,841 INFO L513 BasicCegarLoop]: trace histogram [35, 33, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:58,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:59,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:59,068 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:59,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:59,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1543618209, now seen corresponding path program 32 times [2021-11-02 23:01:59,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:59,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007493228] [2021-11-02 23:01:59,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:59,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:59,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 102 proven. 1122 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-02 23:01:59,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:59,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007493228] [2021-11-02 23:01:59,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007493228] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:59,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171546012] [2021-11-02 23:01:59,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:01:59,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:59,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:59,732 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:59,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-02 23:02:00,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:02:00,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:00,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-02 23:02:00,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:00,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 102 proven. 1122 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-02 23:02:00,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171546012] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:00,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:00,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-11-02 23:02:00,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579409583] [2021-11-02 23:02:00,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-02 23:02:00,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:00,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-02 23:02:00,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 23:02:00,595 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:00,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:00,693 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2021-11-02 23:02:00,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-02 23:02:00,693 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 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 87 [2021-11-02 23:02:00,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:00,694 INFO L225 Difference]: With dead ends: 110 [2021-11-02 23:02:00,695 INFO L226 Difference]: Without dead ends: 90 [2021-11-02 23:02:00,696 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 23:02:00,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-02 23:02:00,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-02 23:02:00,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:00,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2021-11-02 23:02:00,712 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 87 [2021-11-02 23:02:00,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:00,713 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2021-11-02 23:02:00,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:00,713 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2021-11-02 23:02:00,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-02 23:02:00,714 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:00,714 INFO L513 BasicCegarLoop]: trace histogram [36, 34, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:00,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:00,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-02 23:02:00,923 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:00,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:00,924 INFO L85 PathProgramCache]: Analyzing trace with hash -106263074, now seen corresponding path program 33 times [2021-11-02 23:02:00,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:00,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094277090] [2021-11-02 23:02:00,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:00,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 105 proven. 1190 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-02 23:02:01,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:01,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094277090] [2021-11-02 23:02:01,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094277090] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:01,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135355956] [2021-11-02 23:02:01,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:02:01,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:01,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:01,635 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:01,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-02 23:02:02,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-02 23:02:02,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:02,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:02:02,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:02,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 170 proven. 4 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2021-11-02 23:02:02,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135355956] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:02,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:02,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 5] total 40 [2021-11-02 23:02:02,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766833845] [2021-11-02 23:02:02,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-02 23:02:02,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:02,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-02 23:02:02,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 23:02:02,624 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 40 states, 40 states have (on average 2.225) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:02,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:02,737 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2021-11-02 23:02:02,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-02 23:02:02,737 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 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 [2021-11-02 23:02:02,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:02,738 INFO L225 Difference]: With dead ends: 115 [2021-11-02 23:02:02,739 INFO L226 Difference]: Without dead ends: 95 [2021-11-02 23:02:02,739 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 23:02:02,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-02 23:02:02,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2021-11-02 23:02:02,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.053763440860215) internal successors, (98), 93 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:02,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2021-11-02 23:02:02,746 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 89 [2021-11-02 23:02:02,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:02,746 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2021-11-02 23:02:02,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:02,747 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2021-11-02 23:02:02,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-02 23:02:02,748 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:02,748 INFO L513 BasicCegarLoop]: trace histogram [38, 35, 10, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:02,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-02 23:02:02,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-02 23:02:02,963 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:02,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:02,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1851451562, now seen corresponding path program 34 times [2021-11-02 23:02:02,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:02,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075465734] [2021-11-02 23:02:02,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:02,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:03,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1499 backedges. 180 proven. 1260 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-02 23:02:03,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:03,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075465734] [2021-11-02 23:02:03,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075465734] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:03,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742972780] [2021-11-02 23:02:03,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:02:03,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:03,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:03,723 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:03,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-02 23:02:04,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:02:04,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:04,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 23:02:04,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1499 backedges. 180 proven. 1260 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-02 23:02:04,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742972780] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:04,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:04,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-11-02 23:02:04,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133654805] [2021-11-02 23:02:04,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-02 23:02:04,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:04,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-02 23:02:04,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 23:02:04,718 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 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) [2021-11-02 23:02:04,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:04,822 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2021-11-02 23:02:04,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-02 23:02:04,825 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 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 93 [2021-11-02 23:02:04,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:04,826 INFO L225 Difference]: With dead ends: 118 [2021-11-02 23:02:04,826 INFO L226 Difference]: Without dead ends: 96 [2021-11-02 23:02:04,826 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 23:02:04,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-02 23:02:04,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-11-02 23:02:04,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 95 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:04,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2021-11-02 23:02:04,832 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 93 [2021-11-02 23:02:04,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:04,833 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2021-11-02 23:02:04,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 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) [2021-11-02 23:02:04,833 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2021-11-02 23:02:04,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-02 23:02:04,833 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:04,834 INFO L513 BasicCegarLoop]: trace histogram [39, 36, 10, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:04,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-02 23:02:05,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-02 23:02:05,034 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:05,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:05,035 INFO L85 PathProgramCache]: Analyzing trace with hash 370328787, now seen corresponding path program 35 times [2021-11-02 23:02:05,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:05,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511895087] [2021-11-02 23:02:05,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:05,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:05,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 185 proven. 1332 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-02 23:02:05,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:05,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511895087] [2021-11-02 23:02:05,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511895087] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:05,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150919797] [2021-11-02 23:02:05,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:02:05,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:05,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:05,878 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:05,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-02 23:02:06,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2021-11-02 23:02:06,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:06,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-02 23:02:06,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:06,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 185 proven. 1332 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-02 23:02:06,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150919797] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:06,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:06,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-11-02 23:02:06,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856065762] [2021-11-02 23:02:06,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-02 23:02:06,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:06,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-02 23:02:06,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 23:02:06,955 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 40 states, 40 states have (on average 2.175) internal successors, (87), 40 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) [2021-11-02 23:02:07,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:07,066 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2021-11-02 23:02:07,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-02 23:02:07,070 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 40 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) Word has length 95 [2021-11-02 23:02:07,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:07,071 INFO L225 Difference]: With dead ends: 120 [2021-11-02 23:02:07,071 INFO L226 Difference]: Without dead ends: 98 [2021-11-02 23:02:07,072 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 23:02:07,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-02 23:02:07,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-11-02 23:02:07,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 97 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) [2021-11-02 23:02:07,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2021-11-02 23:02:07,081 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 95 [2021-11-02 23:02:07,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:07,081 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2021-11-02 23:02:07,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 40 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) [2021-11-02 23:02:07,082 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2021-11-02 23:02:07,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-02 23:02:07,083 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:07,083 INFO L513 BasicCegarLoop]: trace histogram [40, 37, 10, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:07,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-11-02 23:02:07,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-02 23:02:07,295 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:07,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:07,296 INFO L85 PathProgramCache]: Analyzing trace with hash 902498064, now seen corresponding path program 36 times [2021-11-02 23:02:07,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:07,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705098314] [2021-11-02 23:02:07,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:07,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:08,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 190 proven. 1406 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-02 23:02:08,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:08,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705098314] [2021-11-02 23:02:08,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705098314] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:08,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663129526] [2021-11-02 23:02:08,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:02:08,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:08,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:08,034 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:08,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-02 23:02:08,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-02 23:02:08,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:08,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 23:02:08,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 194 proven. 55 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2021-11-02 23:02:09,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663129526] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:09,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:09,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 15] total 53 [2021-11-02 23:02:09,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864669726] [2021-11-02 23:02:09,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-02 23:02:09,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:09,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-02 23:02:09,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=884, Invalid=1872, Unknown=0, NotChecked=0, Total=2756 [2021-11-02 23:02:09,347 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 53 states, 53 states have (on average 2.0) internal successors, (106), 53 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:10,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:10,386 INFO L93 Difference]: Finished difference Result 135 states and 151 transitions. [2021-11-02 23:02:10,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-02 23:02:10,387 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0) internal successors, (106), 53 states have internal predecessors, (106), 0 states have call successors, (0), 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 [2021-11-02 23:02:10,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:10,388 INFO L225 Difference]: With dead ends: 135 [2021-11-02 23:02:10,388 INFO L226 Difference]: Without dead ends: 113 [2021-11-02 23:02:10,389 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2784, Invalid=5406, Unknown=0, NotChecked=0, Total=8190 [2021-11-02 23:02:10,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-02 23:02:10,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2021-11-02 23:02:10,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.05) internal successors, (105), 100 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:10,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2021-11-02 23:02:10,395 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 97 [2021-11-02 23:02:10,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:10,395 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2021-11-02 23:02:10,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0) internal successors, (106), 53 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:10,396 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2021-11-02 23:02:10,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-02 23:02:10,397 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:10,397 INFO L513 BasicCegarLoop]: trace histogram [41, 38, 11, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:10,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:10,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:10,607 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:10,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:10,607 INFO L85 PathProgramCache]: Analyzing trace with hash -955024129, now seen corresponding path program 37 times [2021-11-02 23:02:10,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:10,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763751987] [2021-11-02 23:02:10,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:10,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:10,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:11,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1747 backedges. 195 proven. 1482 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-02 23:02:11,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:11,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763751987] [2021-11-02 23:02:11,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763751987] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:11,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365060459] [2021-11-02 23:02:11,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:02:11,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:11,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:11,397 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:11,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-02 23:02:12,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:12,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-02 23:02:12,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:12,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1747 backedges. 195 proven. 1482 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-02 23:02:12,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365060459] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:12,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:12,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-11-02 23:02:12,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758991204] [2021-11-02 23:02:12,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-02 23:02:12,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:12,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-02 23:02:12,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 23:02:12,552 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:12,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:12,673 INFO L93 Difference]: Finished difference Result 126 states and 135 transitions. [2021-11-02 23:02:12,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-02 23:02:12,673 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 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 100 [2021-11-02 23:02:12,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:12,675 INFO L225 Difference]: With dead ends: 126 [2021-11-02 23:02:12,675 INFO L226 Difference]: Without dead ends: 103 [2021-11-02 23:02:12,676 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 23:02:12,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-02 23:02:12,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-11-02 23:02:12,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0490196078431373) internal successors, (107), 102 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) [2021-11-02 23:02:12,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2021-11-02 23:02:12,685 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 100 [2021-11-02 23:02:12,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:12,685 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2021-11-02 23:02:12,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:12,686 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2021-11-02 23:02:12,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-02 23:02:12,687 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:12,687 INFO L513 BasicCegarLoop]: trace histogram [42, 39, 11, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:12,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:12,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-02 23:02:12,901 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:12,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:12,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1035200286, now seen corresponding path program 38 times [2021-11-02 23:02:12,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:12,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448516087] [2021-11-02 23:02:12,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:12,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:13,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 200 proven. 1560 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-02 23:02:13,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:13,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448516087] [2021-11-02 23:02:13,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448516087] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:13,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151712883] [2021-11-02 23:02:13,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:02:13,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:13,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:13,762 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:13,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-02 23:02:14,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:02:14,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:14,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 23:02:14,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:14,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 200 proven. 1560 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-02 23:02:14,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151712883] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:14,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:14,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-11-02 23:02:14,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130834026] [2021-11-02 23:02:14,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-02 23:02:14,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:14,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-02 23:02:14,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-11-02 23:02:14,940 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:15,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:15,046 INFO L93 Difference]: Finished difference Result 128 states and 137 transitions. [2021-11-02 23:02:15,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-02 23:02:15,046 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 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 102 [2021-11-02 23:02:15,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:15,047 INFO L225 Difference]: With dead ends: 128 [2021-11-02 23:02:15,047 INFO L226 Difference]: Without dead ends: 105 [2021-11-02 23:02:15,047 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-11-02 23:02:15,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-02 23:02:15,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-11-02 23:02:15,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0480769230769231) internal successors, (109), 104 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:15,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2021-11-02 23:02:15,055 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 102 [2021-11-02 23:02:15,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:15,056 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2021-11-02 23:02:15,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:15,057 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2021-11-02 23:02:15,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-02 23:02:15,057 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:15,058 INFO L513 BasicCegarLoop]: trace histogram [43, 40, 11, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:15,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:15,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:15,283 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:15,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:15,283 INFO L85 PathProgramCache]: Analyzing trace with hash -775075835, now seen corresponding path program 39 times [2021-11-02 23:02:15,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:15,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927107731] [2021-11-02 23:02:15,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:15,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:15,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:16,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1915 backedges. 205 proven. 1640 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-02 23:02:16,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:16,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927107731] [2021-11-02 23:02:16,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927107731] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:16,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097002139] [2021-11-02 23:02:16,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:02:16,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:16,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:16,322 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:16,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-02 23:02:17,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-02 23:02:17,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:17,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 23:02:17,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1915 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2021-11-02 23:02:17,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097002139] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:17,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:17,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 16] total 57 [2021-11-02 23:02:17,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403032985] [2021-11-02 23:02:17,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-02 23:02:17,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:17,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-02 23:02:17,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1022, Invalid=2170, Unknown=0, NotChecked=0, Total=3192 [2021-11-02 23:02:17,801 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:19,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:19,003 INFO L93 Difference]: Finished difference Result 143 states and 159 transitions. [2021-11-02 23:02:19,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-02 23:02:19,004 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 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 104 [2021-11-02 23:02:19,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:19,005 INFO L225 Difference]: With dead ends: 143 [2021-11-02 23:02:19,005 INFO L226 Difference]: Without dead ends: 120 [2021-11-02 23:02:19,007 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1522 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3236, Invalid=6270, Unknown=0, NotChecked=0, Total=9506 [2021-11-02 23:02:19,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-02 23:02:19,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 108. [2021-11-02 23:02:19,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0467289719626167) internal successors, (112), 107 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:19,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2021-11-02 23:02:19,017 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 104 [2021-11-02 23:02:19,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:19,017 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2021-11-02 23:02:19,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:19,018 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2021-11-02 23:02:19,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-02 23:02:19,019 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:19,019 INFO L513 BasicCegarLoop]: trace histogram [44, 41, 12, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:19,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-11-02 23:02:19,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:19,235 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:19,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:19,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1304331260, now seen corresponding path program 40 times [2021-11-02 23:02:19,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:19,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041990791] [2021-11-02 23:02:19,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:19,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:20,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2014 backedges. 210 proven. 1722 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-02 23:02:20,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:20,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041990791] [2021-11-02 23:02:20,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041990791] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:20,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262104787] [2021-11-02 23:02:20,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:02:20,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:20,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:20,135 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:20,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-02 23:02:21,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:02:21,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:21,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 23:02:21,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:21,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2014 backedges. 210 proven. 1722 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-02 23:02:21,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262104787] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:21,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:21,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-11-02 23:02:21,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302590610] [2021-11-02 23:02:21,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-02 23:02:21,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:21,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-02 23:02:21,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 23:02:21,413 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:21,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:21,534 INFO L93 Difference]: Finished difference Result 134 states and 143 transitions. [2021-11-02 23:02:21,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-02 23:02:21,534 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 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 107 [2021-11-02 23:02:21,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:21,535 INFO L225 Difference]: With dead ends: 134 [2021-11-02 23:02:21,535 INFO L226 Difference]: Without dead ends: 110 [2021-11-02 23:02:21,536 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 23:02:21,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-02 23:02:21,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-11-02 23:02:21,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 109 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) [2021-11-02 23:02:21,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2021-11-02 23:02:21,542 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 107 [2021-11-02 23:02:21,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:21,543 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2021-11-02 23:02:21,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:21,543 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2021-11-02 23:02:21,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-02 23:02:21,544 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:21,544 INFO L513 BasicCegarLoop]: trace histogram [45, 42, 12, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:21,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-11-02 23:02:21,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:21,759 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:21,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:21,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1696642367, now seen corresponding path program 41 times [2021-11-02 23:02:21,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:21,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476206688] [2021-11-02 23:02:21,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:21,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:21,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:22,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2103 backedges. 215 proven. 1806 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-02 23:02:22,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:22,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476206688] [2021-11-02 23:02:22,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476206688] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:22,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362216111] [2021-11-02 23:02:22,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:02:22,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:22,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:22,884 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:22,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-02 23:02:24,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2021-11-02 23:02:24,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:24,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-02 23:02:24,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2103 backedges. 215 proven. 1806 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-02 23:02:24,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362216111] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:24,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:24,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-11-02 23:02:24,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675513169] [2021-11-02 23:02:24,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-02 23:02:24,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:24,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-02 23:02:24,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 23:02:24,462 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:24,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:24,592 INFO L93 Difference]: Finished difference Result 136 states and 145 transitions. [2021-11-02 23:02:24,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-02 23:02:24,593 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 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 [2021-11-02 23:02:24,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:24,594 INFO L225 Difference]: With dead ends: 136 [2021-11-02 23:02:24,594 INFO L226 Difference]: Without dead ends: 112 [2021-11-02 23:02:24,594 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 23:02:24,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-02 23:02:24,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-11-02 23:02:24,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.045045045045045) internal successors, (116), 111 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:24,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2021-11-02 23:02:24,604 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 109 [2021-11-02 23:02:24,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:24,605 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2021-11-02 23:02:24,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:24,605 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2021-11-02 23:02:24,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-02 23:02:24,606 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:24,606 INFO L513 BasicCegarLoop]: trace histogram [46, 43, 12, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:24,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-02 23:02:24,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:24,823 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:24,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:24,823 INFO L85 PathProgramCache]: Analyzing trace with hash -750494146, now seen corresponding path program 42 times [2021-11-02 23:02:24,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:24,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072831101] [2021-11-02 23:02:24,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:24,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:24,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2194 backedges. 220 proven. 1892 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-02 23:02:25,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:25,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072831101] [2021-11-02 23:02:25,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072831101] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:25,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322763832] [2021-11-02 23:02:25,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:02:25,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:25,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:25,926 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:25,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-02 23:02:26,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-02 23:02:26,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:26,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:02:26,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:27,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2194 backedges. 224 proven. 78 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2021-11-02 23:02:27,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322763832] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:27,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:27,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 17] total 61 [2021-11-02 23:02:27,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213455225] [2021-11-02 23:02:27,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-02 23:02:27,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:27,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-02 23:02:27,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1170, Invalid=2490, Unknown=0, NotChecked=0, Total=3660 [2021-11-02 23:02:27,653 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand has 61 states, 61 states have (on average 1.9672131147540983) internal successors, (120), 61 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) [2021-11-02 23:02:28,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:28,923 INFO L93 Difference]: Finished difference Result 151 states and 167 transitions. [2021-11-02 23:02:28,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-02 23:02:28,925 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9672131147540983) internal successors, (120), 61 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) Word has length 111 [2021-11-02 23:02:28,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:28,926 INFO L225 Difference]: With dead ends: 151 [2021-11-02 23:02:28,926 INFO L226 Difference]: Without dead ends: 127 [2021-11-02 23:02:28,928 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1745 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3722, Invalid=7198, Unknown=0, NotChecked=0, Total=10920 [2021-11-02 23:02:28,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-02 23:02:28,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2021-11-02 23:02:28,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.043859649122807) internal successors, (119), 114 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) [2021-11-02 23:02:28,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2021-11-02 23:02:28,939 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 111 [2021-11-02 23:02:28,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:28,939 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2021-11-02 23:02:28,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9672131147540983) internal successors, (120), 61 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) [2021-11-02 23:02:28,940 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2021-11-02 23:02:28,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-02 23:02:28,941 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:28,941 INFO L513 BasicCegarLoop]: trace histogram [47, 44, 13, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:28,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:29,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-02 23:02:29,155 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:29,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:29,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1337438801, now seen corresponding path program 43 times [2021-11-02 23:02:29,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:29,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087733653] [2021-11-02 23:02:29,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:29,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2300 backedges. 225 proven. 1980 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-02 23:02:30,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:30,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087733653] [2021-11-02 23:02:30,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087733653] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:30,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461174085] [2021-11-02 23:02:30,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:02:30,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:30,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:30,370 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:30,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-02 23:02:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:31,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-02 23:02:31,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:31,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2300 backedges. 225 proven. 1980 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-02 23:02:31,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461174085] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:31,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:31,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-11-02 23:02:31,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20476148] [2021-11-02 23:02:31,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-02 23:02:31,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:31,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-02 23:02:31,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-11-02 23:02:31,783 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand has 48 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 48 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) [2021-11-02 23:02:31,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:31,938 INFO L93 Difference]: Finished difference Result 142 states and 151 transitions. [2021-11-02 23:02:31,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-02 23:02:31,951 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 48 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) Word has length 114 [2021-11-02 23:02:31,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:31,953 INFO L225 Difference]: With dead ends: 142 [2021-11-02 23:02:31,953 INFO L226 Difference]: Without dead ends: 117 [2021-11-02 23:02:31,954 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-11-02 23:02:31,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-02 23:02:31,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-11-02 23:02:31,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.043103448275862) internal successors, (121), 116 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:31,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2021-11-02 23:02:31,963 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 114 [2021-11-02 23:02:31,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:31,964 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2021-11-02 23:02:31,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 48 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) [2021-11-02 23:02:31,964 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2021-11-02 23:02:31,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-02 23:02:31,965 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:31,965 INFO L513 BasicCegarLoop]: trace histogram [48, 45, 13, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:32,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:32,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-02 23:02:32,187 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:32,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:32,187 INFO L85 PathProgramCache]: Analyzing trace with hash -808172300, now seen corresponding path program 44 times [2021-11-02 23:02:32,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:32,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816401090] [2021-11-02 23:02:32,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:32,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:32,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:33,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2395 backedges. 230 proven. 2070 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-02 23:02:33,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:33,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816401090] [2021-11-02 23:02:33,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816401090] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:33,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863561204] [2021-11-02 23:02:33,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:02:33,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:33,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:33,340 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:33,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-02 23:02:34,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:02:34,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:34,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-02 23:02:34,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:34,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2395 backedges. 230 proven. 2070 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-02 23:02:34,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863561204] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:34,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:34,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-11-02 23:02:34,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171777349] [2021-11-02 23:02:34,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-02 23:02:34,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:34,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-02 23:02:34,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 23:02:34,702 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:34,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:34,828 INFO L93 Difference]: Finished difference Result 144 states and 153 transitions. [2021-11-02 23:02:34,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-02 23:02:34,828 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 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 116 [2021-11-02 23:02:34,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:34,829 INFO L225 Difference]: With dead ends: 144 [2021-11-02 23:02:34,829 INFO L226 Difference]: Without dead ends: 119 [2021-11-02 23:02:34,830 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 23:02:34,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-02 23:02:34,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-11-02 23:02:34,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0423728813559323) internal successors, (123), 118 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:34,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2021-11-02 23:02:34,839 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 116 [2021-11-02 23:02:34,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:34,839 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2021-11-02 23:02:34,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:34,839 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2021-11-02 23:02:34,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-02 23:02:34,840 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:34,840 INFO L513 BasicCegarLoop]: trace histogram [49, 46, 13, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:34,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-11-02 23:02:35,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-02 23:02:35,059 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:35,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:35,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1156138281, now seen corresponding path program 45 times [2021-11-02 23:02:35,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:35,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738234033] [2021-11-02 23:02:35,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:35,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:35,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:36,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 235 proven. 2162 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-02 23:02:36,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:36,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738234033] [2021-11-02 23:02:36,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738234033] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:36,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400383007] [2021-11-02 23:02:36,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:02:36,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:36,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:36,053 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:36,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-02 23:02:36,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-02 23:02:36,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:36,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 23:02:36,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:37,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 239 proven. 91 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2021-11-02 23:02:37,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400383007] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:37,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:37,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 18] total 65 [2021-11-02 23:02:37,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175875691] [2021-11-02 23:02:37,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-02 23:02:37,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:37,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-02 23:02:37,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=2832, Unknown=0, NotChecked=0, Total=4160 [2021-11-02 23:02:37,659 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand has 65 states, 65 states have (on average 1.9538461538461538) internal successors, (127), 65 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) [2021-11-02 23:02:38,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:38,898 INFO L93 Difference]: Finished difference Result 159 states and 175 transitions. [2021-11-02 23:02:38,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-02 23:02:38,899 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.9538461538461538) internal successors, (127), 65 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) Word has length 118 [2021-11-02 23:02:38,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:38,900 INFO L225 Difference]: With dead ends: 159 [2021-11-02 23:02:38,900 INFO L226 Difference]: Without dead ends: 134 [2021-11-02 23:02:38,901 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1983 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4242, Invalid=8190, Unknown=0, NotChecked=0, Total=12432 [2021-11-02 23:02:38,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-02 23:02:38,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 122. [2021-11-02 23:02:38,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0413223140495869) internal successors, (126), 121 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) [2021-11-02 23:02:38,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2021-11-02 23:02:38,911 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 118 [2021-11-02 23:02:38,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:38,912 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2021-11-02 23:02:38,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.9538461538461538) internal successors, (127), 65 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) [2021-11-02 23:02:38,912 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2021-11-02 23:02:38,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-02 23:02:38,913 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:38,913 INFO L513 BasicCegarLoop]: trace histogram [50, 47, 14, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:38,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:39,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-02 23:02:39,139 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:39,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:39,139 INFO L85 PathProgramCache]: Analyzing trace with hash 317629618, now seen corresponding path program 46 times [2021-11-02 23:02:39,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:39,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209285645] [2021-11-02 23:02:39,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:39,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:39,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2605 backedges. 240 proven. 2256 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-02 23:02:40,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:40,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209285645] [2021-11-02 23:02:40,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209285645] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:40,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147191411] [2021-11-02 23:02:40,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:02:40,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:40,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:40,359 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:40,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-02 23:02:41,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:02:41,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:41,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 23:02:41,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:41,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2605 backedges. 240 proven. 2256 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-02 23:02:41,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147191411] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:41,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:41,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-11-02 23:02:41,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074560744] [2021-11-02 23:02:41,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-02 23:02:41,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:41,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-02 23:02:41,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-11-02 23:02:41,841 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand has 51 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:41,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:41,947 INFO L93 Difference]: Finished difference Result 150 states and 159 transitions. [2021-11-02 23:02:41,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-02 23:02:41,948 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 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 [2021-11-02 23:02:41,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:41,949 INFO L225 Difference]: With dead ends: 150 [2021-11-02 23:02:41,949 INFO L226 Difference]: Without dead ends: 124 [2021-11-02 23:02:41,950 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-11-02 23:02:41,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-02 23:02:41,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-11-02 23:02:41,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.0406504065040652) internal successors, (128), 123 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:41,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2021-11-02 23:02:41,956 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 121 [2021-11-02 23:02:41,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:41,956 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2021-11-02 23:02:41,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:41,957 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2021-11-02 23:02:41,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-02 23:02:41,957 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:41,957 INFO L513 BasicCegarLoop]: trace histogram [51, 48, 14, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:42,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:42,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:42,158 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:42,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:42,159 INFO L85 PathProgramCache]: Analyzing trace with hash 189359279, now seen corresponding path program 47 times [2021-11-02 23:02:42,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:42,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11778820] [2021-11-02 23:02:42,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:42,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:43,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 245 proven. 2352 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-02 23:02:43,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:43,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11778820] [2021-11-02 23:02:43,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11778820] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:43,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76781479] [2021-11-02 23:02:43,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:02:43,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:43,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:43,296 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:43,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-02 23:02:44,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2021-11-02 23:02:44,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:44,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-02 23:02:44,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:44,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 245 proven. 2352 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-02 23:02:44,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76781479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:44,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:44,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-11-02 23:02:44,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457026996] [2021-11-02 23:02:44,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-02 23:02:44,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:44,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-02 23:02:44,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-11-02 23:02:44,696 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 52 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) [2021-11-02 23:02:44,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:44,840 INFO L93 Difference]: Finished difference Result 152 states and 161 transitions. [2021-11-02 23:02:44,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-02 23:02:44,841 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 52 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) Word has length 123 [2021-11-02 23:02:44,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:44,842 INFO L225 Difference]: With dead ends: 152 [2021-11-02 23:02:44,842 INFO L226 Difference]: Without dead ends: 126 [2021-11-02 23:02:44,843 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-11-02 23:02:44,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-02 23:02:44,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-11-02 23:02:44,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.04) internal successors, (130), 125 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:44,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2021-11-02 23:02:44,852 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 123 [2021-11-02 23:02:44,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:44,853 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2021-11-02 23:02:44,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 52 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) [2021-11-02 23:02:44,853 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2021-11-02 23:02:44,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-02 23:02:44,854 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:44,854 INFO L513 BasicCegarLoop]: trace histogram [52, 49, 14, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:44,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:45,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-11-02 23:02:45,084 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:45,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:45,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1475615084, now seen corresponding path program 48 times [2021-11-02 23:02:45,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:45,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798458632] [2021-11-02 23:02:45,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:45,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:46,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 250 proven. 2450 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-02 23:02:46,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:46,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798458632] [2021-11-02 23:02:46,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798458632] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:46,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62981839] [2021-11-02 23:02:46,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:02:46,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:46,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:46,191 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:46,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-02 23:02:47,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-11-02 23:02:47,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:47,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 23:02:47,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 254 proven. 105 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2021-11-02 23:02:47,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62981839] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:47,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:47,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 19] total 69 [2021-11-02 23:02:47,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815284861] [2021-11-02 23:02:47,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-02 23:02:47,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:47,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-02 23:02:47,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1496, Invalid=3196, Unknown=0, NotChecked=0, Total=4692 [2021-11-02 23:02:47,973 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 69 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:49,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:49,607 INFO L93 Difference]: Finished difference Result 167 states and 183 transitions. [2021-11-02 23:02:49,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-02 23:02:49,608 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 69 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-02 23:02:49,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:49,609 INFO L225 Difference]: With dead ends: 167 [2021-11-02 23:02:49,609 INFO L226 Difference]: Without dead ends: 141 [2021-11-02 23:02:49,610 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2236 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4796, Invalid=9246, Unknown=0, NotChecked=0, Total=14042 [2021-11-02 23:02:49,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-02 23:02:49,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 129. [2021-11-02 23:02:49,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.0390625) internal successors, (133), 128 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:49,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2021-11-02 23:02:49,617 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 125 [2021-11-02 23:02:49,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:49,617 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2021-11-02 23:02:49,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 69 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:49,618 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2021-11-02 23:02:49,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-02 23:02:49,619 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:49,619 INFO L513 BasicCegarLoop]: trace histogram [53, 50, 15, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:49,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:49,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:49,835 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:49,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:49,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1944531875, now seen corresponding path program 49 times [2021-11-02 23:02:49,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:49,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922104435] [2021-11-02 23:02:49,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:49,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 255 proven. 2550 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-02 23:02:51,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:51,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922104435] [2021-11-02 23:02:51,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922104435] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:51,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286379740] [2021-11-02 23:02:51,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:02:51,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:51,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:51,089 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:51,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-02 23:02:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:52,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-02 23:02:52,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:52,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 255 proven. 2550 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-02 23:02:52,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286379740] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:52,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:52,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2021-11-02 23:02:52,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927948265] [2021-11-02 23:02:52,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-02 23:02:52,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:52,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-02 23:02:52,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 23:02:52,563 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 54 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:52,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:52,719 INFO L93 Difference]: Finished difference Result 158 states and 167 transitions. [2021-11-02 23:02:52,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-02 23:02:52,720 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 54 states have internal predecessors, (115), 0 states have call successors, (0), 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 128 [2021-11-02 23:02:52,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:52,721 INFO L225 Difference]: With dead ends: 158 [2021-11-02 23:02:52,721 INFO L226 Difference]: Without dead ends: 131 [2021-11-02 23:02:52,722 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 23:02:52,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-02 23:02:52,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-11-02 23:02:52,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0384615384615385) internal successors, (135), 130 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) [2021-11-02 23:02:52,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2021-11-02 23:02:52,731 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 128 [2021-11-02 23:02:52,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:52,732 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2021-11-02 23:02:52,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 54 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:52,732 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2021-11-02 23:02:52,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-02 23:02:52,733 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:52,733 INFO L513 BasicCegarLoop]: trace histogram [54, 51, 15, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:52,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-11-02 23:02:52,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-11-02 23:02:52,947 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:52,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:52,947 INFO L85 PathProgramCache]: Analyzing trace with hash -330240762, now seen corresponding path program 50 times [2021-11-02 23:02:52,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:52,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546774148] [2021-11-02 23:02:52,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:52,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:53,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:54,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3036 backedges. 260 proven. 2652 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-02 23:02:54,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:54,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546774148] [2021-11-02 23:02:54,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546774148] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:54,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999360669] [2021-11-02 23:02:54,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:02:54,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:54,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:54,283 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:54,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-02 23:02:55,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:02:55,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:55,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-02 23:02:55,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3036 backedges. 260 proven. 2652 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-02 23:02:55,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999360669] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:55,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:55,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2021-11-02 23:02:55,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097087875] [2021-11-02 23:02:55,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-02 23:02:55,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:55,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-02 23:02:55,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-11-02 23:02:55,934 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:56,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:56,135 INFO L93 Difference]: Finished difference Result 160 states and 169 transitions. [2021-11-02 23:02:56,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-02 23:02:56,135 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 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 [2021-11-02 23:02:56,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:56,136 INFO L225 Difference]: With dead ends: 160 [2021-11-02 23:02:56,137 INFO L226 Difference]: Without dead ends: 133 [2021-11-02 23:02:56,137 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-11-02 23:02:56,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-02 23:02:56,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-11-02 23:02:56,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0378787878787878) internal successors, (137), 132 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:56,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 137 transitions. [2021-11-02 23:02:56,149 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 137 transitions. Word has length 130 [2021-11-02 23:02:56,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:56,150 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 137 transitions. [2021-11-02 23:02:56,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:56,150 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 137 transitions. [2021-11-02 23:02:56,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-02 23:02:56,151 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:56,151 INFO L513 BasicCegarLoop]: trace histogram [55, 52, 15, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:56,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:56,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-02 23:02:56,367 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:56,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:56,367 INFO L85 PathProgramCache]: Analyzing trace with hash -248391255, now seen corresponding path program 51 times [2021-11-02 23:02:56,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:56,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37724188] [2021-11-02 23:02:56,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:56,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:56,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3145 backedges. 265 proven. 2756 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-02 23:02:57,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:57,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37724188] [2021-11-02 23:02:57,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37724188] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:57,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459674137] [2021-11-02 23:02:57,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:02:57,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:57,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:57,754 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:57,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-02 23:02:59,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-02 23:02:59,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:59,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:02:59,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:59,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3145 backedges. 364 proven. 9 refuted. 0 times theorem prover too weak. 2772 trivial. 0 not checked. [2021-11-02 23:02:59,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459674137] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:59,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:59,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 6] total 59 [2021-11-02 23:02:59,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165192559] [2021-11-02 23:02:59,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-02 23:02:59,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:59,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-02 23:02:59,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-11-02 23:02:59,591 INFO L87 Difference]: Start difference. First operand 133 states and 137 transitions. Second operand has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 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) [2021-11-02 23:02:59,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:59,895 INFO L93 Difference]: Finished difference Result 165 states and 177 transitions. [2021-11-02 23:02:59,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-02 23:02:59,896 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 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) Word has length 132 [2021-11-02 23:02:59,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:59,898 INFO L225 Difference]: With dead ends: 165 [2021-11-02 23:02:59,898 INFO L226 Difference]: Without dead ends: 138 [2021-11-02 23:02:59,899 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-11-02 23:02:59,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-02 23:02:59,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-11-02 23:02:59,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0441176470588236) internal successors, (142), 136 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:59,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 142 transitions. [2021-11-02 23:02:59,914 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 142 transitions. Word has length 132 [2021-11-02 23:02:59,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:59,915 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 142 transitions. [2021-11-02 23:02:59,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 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) [2021-11-02 23:02:59,915 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 142 transitions. [2021-11-02 23:02:59,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-02 23:02:59,917 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:59,917 INFO L513 BasicCegarLoop]: trace histogram [57, 53, 15, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:59,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:00,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-02 23:03:00,143 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:00,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:00,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1336946225, now seen corresponding path program 52 times [2021-11-02 23:03:00,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:00,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411740127] [2021-11-02 23:03:00,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:00,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:00,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:01,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3369 backedges. 378 proven. 2862 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-02 23:03:01,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:01,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411740127] [2021-11-02 23:03:01,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411740127] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:01,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115483026] [2021-11-02 23:03:01,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:03:01,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:01,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:01,719 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:01,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-02 23:03:03,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:03:03,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:03,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-02 23:03:03,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3369 backedges. 378 proven. 2862 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-02 23:03:03,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115483026] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:03,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:03,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2021-11-02 23:03:03,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297313440] [2021-11-02 23:03:03,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-02 23:03:03,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:03,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-02 23:03:03,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-11-02 23:03:03,566 INFO L87 Difference]: Start difference. First operand 137 states and 142 transitions. Second operand has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:03,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:03,765 INFO L93 Difference]: Finished difference Result 168 states and 179 transitions. [2021-11-02 23:03:03,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-02 23:03:03,766 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 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 136 [2021-11-02 23:03:03,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:03,767 INFO L225 Difference]: With dead ends: 168 [2021-11-02 23:03:03,767 INFO L226 Difference]: Without dead ends: 139 [2021-11-02 23:03:03,768 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-11-02 23:03:03,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-02 23:03:03,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-11-02 23:03:03,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0434782608695652) internal successors, (144), 138 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) [2021-11-02 23:03:03,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 144 transitions. [2021-11-02 23:03:03,782 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 144 transitions. Word has length 136 [2021-11-02 23:03:03,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:03,782 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 144 transitions. [2021-11-02 23:03:03,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:03,783 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 144 transitions. [2021-11-02 23:03:03,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-02 23:03:03,784 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:03,784 INFO L513 BasicCegarLoop]: trace histogram [58, 54, 15, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:03,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:03,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-02 23:03:03,999 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:03,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:03,999 INFO L85 PathProgramCache]: Analyzing trace with hash 432526484, now seen corresponding path program 53 times [2021-11-02 23:03:03,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:03,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025978245] [2021-11-02 23:03:04,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:04,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:04,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3484 backedges. 385 proven. 2970 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-02 23:03:05,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:05,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025978245] [2021-11-02 23:03:05,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025978245] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:05,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103880142] [2021-11-02 23:03:05,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:03:05,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:05,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:05,503 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:05,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-02 23:03:06,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 59 check-sat command(s) [2021-11-02 23:03:06,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:06,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-02 23:03:06,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:07,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3484 backedges. 385 proven. 2970 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-02 23:03:07,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103880142] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:07,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:07,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2021-11-02 23:03:07,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145098973] [2021-11-02 23:03:07,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-02 23:03:07,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:07,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-02 23:03:07,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-11-02 23:03:07,420 INFO L87 Difference]: Start difference. First operand 139 states and 144 transitions. Second operand has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 58 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:07,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:07,559 INFO L93 Difference]: Finished difference Result 170 states and 181 transitions. [2021-11-02 23:03:07,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-02 23:03:07,560 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 58 states have internal predecessors, (123), 0 states have call successors, (0), 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 [2021-11-02 23:03:07,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:07,563 INFO L225 Difference]: With dead ends: 170 [2021-11-02 23:03:07,564 INFO L226 Difference]: Without dead ends: 141 [2021-11-02 23:03:07,564 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-11-02 23:03:07,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-02 23:03:07,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-11-02 23:03:07,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.042857142857143) internal successors, (146), 140 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:07,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 146 transitions. [2021-11-02 23:03:07,574 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 146 transitions. Word has length 138 [2021-11-02 23:03:07,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:07,574 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 146 transitions. [2021-11-02 23:03:07,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 58 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:07,574 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 146 transitions. [2021-11-02 23:03:07,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-02 23:03:07,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:07,575 INFO L513 BasicCegarLoop]: trace histogram [59, 55, 15, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:07,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:07,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-02 23:03:07,776 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:07,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:07,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1131450825, now seen corresponding path program 54 times [2021-11-02 23:03:07,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:07,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360211652] [2021-11-02 23:03:07,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:07,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3601 backedges. 392 proven. 3080 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-02 23:03:09,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:09,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360211652] [2021-11-02 23:03:09,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360211652] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:09,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589582918] [2021-11-02 23:03:09,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:03:09,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:09,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:09,220 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:09,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-02 23:03:10,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-11-02 23:03:10,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:10,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 23:03:10,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3601 backedges. 401 proven. 120 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2021-11-02 23:03:11,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589582918] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:11,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:11,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 20] total 76 [2021-11-02 23:03:11,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127996626] [2021-11-02 23:03:11,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-02 23:03:11,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:11,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-02 23:03:11,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1842, Invalid=3858, Unknown=0, NotChecked=0, Total=5700 [2021-11-02 23:03:11,773 INFO L87 Difference]: Start difference. First operand 141 states and 146 transitions. Second operand has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:13,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:13,723 INFO L93 Difference]: Finished difference Result 193 states and 215 transitions. [2021-11-02 23:03:13,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-11-02 23:03:13,724 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 0 states have call successors, (0), 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 140 [2021-11-02 23:03:13,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:13,726 INFO L225 Difference]: With dead ends: 193 [2021-11-02 23:03:13,726 INFO L226 Difference]: Without dead ends: 164 [2021-11-02 23:03:13,728 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2802 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5874, Invalid=11418, Unknown=0, NotChecked=0, Total=17292 [2021-11-02 23:03:13,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-02 23:03:13,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 144. [2021-11-02 23:03:13,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.0419580419580419) internal successors, (149), 143 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:13,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2021-11-02 23:03:13,742 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 140 [2021-11-02 23:03:13,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:13,742 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2021-11-02 23:03:13,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:13,743 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2021-11-02 23:03:13,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-02 23:03:13,744 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:13,744 INFO L513 BasicCegarLoop]: trace histogram [60, 56, 16, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:13,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:13,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:13,959 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:13,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:13,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1356357230, now seen corresponding path program 55 times [2021-11-02 23:03:13,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:13,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054990404] [2021-11-02 23:03:13,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:13,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3736 backedges. 399 proven. 3192 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-02 23:03:15,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:15,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054990404] [2021-11-02 23:03:15,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054990404] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:15,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914023868] [2021-11-02 23:03:15,401 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:03:15,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:15,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:15,402 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:15,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-02 23:03:16,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:16,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-02 23:03:16,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3736 backedges. 399 proven. 3192 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-02 23:03:17,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914023868] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:17,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:17,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2021-11-02 23:03:17,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207713238] [2021-11-02 23:03:17,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-02 23:03:17,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:17,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-02 23:03:17,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-11-02 23:03:17,260 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand has 60 states, 60 states have (on average 2.1166666666666667) internal successors, (127), 60 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) [2021-11-02 23:03:17,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:17,404 INFO L93 Difference]: Finished difference Result 176 states and 187 transitions. [2021-11-02 23:03:17,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-02 23:03:17,404 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.1166666666666667) internal successors, (127), 60 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) Word has length 143 [2021-11-02 23:03:17,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:17,405 INFO L225 Difference]: With dead ends: 176 [2021-11-02 23:03:17,405 INFO L226 Difference]: Without dead ends: 146 [2021-11-02 23:03:17,406 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-11-02 23:03:17,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-02 23:03:17,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-11-02 23:03:17,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.0413793103448277) internal successors, (151), 145 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) [2021-11-02 23:03:17,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 151 transitions. [2021-11-02 23:03:17,413 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 151 transitions. Word has length 143 [2021-11-02 23:03:17,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:17,413 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 151 transitions. [2021-11-02 23:03:17,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.1166666666666667) internal successors, (127), 60 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) [2021-11-02 23:03:17,414 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 151 transitions. [2021-11-02 23:03:17,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-02 23:03:17,414 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:17,415 INFO L513 BasicCegarLoop]: trace histogram [61, 57, 16, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:17,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-11-02 23:03:17,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:17,631 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:17,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:17,631 INFO L85 PathProgramCache]: Analyzing trace with hash -597846577, now seen corresponding path program 56 times [2021-11-02 23:03:17,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:17,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090160338] [2021-11-02 23:03:17,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:17,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:17,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:19,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3857 backedges. 406 proven. 3306 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-02 23:03:19,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:19,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090160338] [2021-11-02 23:03:19,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090160338] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:19,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019523746] [2021-11-02 23:03:19,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:03:19,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:19,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:19,121 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:19,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-02 23:03:20,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:03:20,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:20,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-02 23:03:20,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3857 backedges. 406 proven. 3306 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-02 23:03:21,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019523746] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:21,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:21,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2021-11-02 23:03:21,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795113602] [2021-11-02 23:03:21,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-02 23:03:21,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:21,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-02 23:03:21,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-11-02 23:03:21,190 INFO L87 Difference]: Start difference. First operand 146 states and 151 transitions. Second operand has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:21,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:21,348 INFO L93 Difference]: Finished difference Result 178 states and 189 transitions. [2021-11-02 23:03:21,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-02 23:03:21,349 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-11-02 23:03:21,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:21,350 INFO L225 Difference]: With dead ends: 178 [2021-11-02 23:03:21,350 INFO L226 Difference]: Without dead ends: 148 [2021-11-02 23:03:21,350 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-11-02 23:03:21,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-02 23:03:21,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-11-02 23:03:21,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0408163265306123) internal successors, (153), 147 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) [2021-11-02 23:03:21,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 153 transitions. [2021-11-02 23:03:21,367 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 153 transitions. Word has length 145 [2021-11-02 23:03:21,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:21,367 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 153 transitions. [2021-11-02 23:03:21,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:21,367 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 153 transitions. [2021-11-02 23:03:21,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-02 23:03:21,368 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:21,368 INFO L513 BasicCegarLoop]: trace histogram [62, 58, 16, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:21,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-11-02 23:03:21,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-11-02 23:03:21,569 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:21,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:21,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1813549364, now seen corresponding path program 57 times [2021-11-02 23:03:21,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:21,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185131927] [2021-11-02 23:03:21,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:21,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:21,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:23,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 413 proven. 3422 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-02 23:03:23,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:23,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185131927] [2021-11-02 23:03:23,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185131927] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:23,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340972324] [2021-11-02 23:03:23,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:03:23,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:23,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:23,035 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:23,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-02 23:03:24,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-02 23:03:24,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:24,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 23:03:24,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:25,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 422 proven. 136 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2021-11-02 23:03:25,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340972324] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:25,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:25,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 21] total 80 [2021-11-02 23:03:25,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114914176] [2021-11-02 23:03:25,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-02 23:03:25,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:25,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-02 23:03:25,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2039, Invalid=4281, Unknown=0, NotChecked=0, Total=6320 [2021-11-02 23:03:25,521 INFO L87 Difference]: Start difference. First operand 148 states and 153 transitions. Second operand has 80 states, 80 states have (on average 1.95) internal successors, (156), 80 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) [2021-11-02 23:03:27,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:27,487 INFO L93 Difference]: Finished difference Result 201 states and 223 transitions. [2021-11-02 23:03:27,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-11-02 23:03:27,488 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.95) internal successors, (156), 80 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) Word has length 147 [2021-11-02 23:03:27,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:27,489 INFO L225 Difference]: With dead ends: 201 [2021-11-02 23:03:27,490 INFO L226 Difference]: Without dead ends: 171 [2021-11-02 23:03:27,492 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=6523, Invalid=12659, Unknown=0, NotChecked=0, Total=19182 [2021-11-02 23:03:27,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-02 23:03:27,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 151. [2021-11-02 23:03:27,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.04) internal successors, (156), 150 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) [2021-11-02 23:03:27,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 156 transitions. [2021-11-02 23:03:27,506 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 156 transitions. Word has length 147 [2021-11-02 23:03:27,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:27,507 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 156 transitions. [2021-11-02 23:03:27,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.95) internal successors, (156), 80 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) [2021-11-02 23:03:27,507 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 156 transitions. [2021-11-02 23:03:27,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-02 23:03:27,508 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:27,508 INFO L513 BasicCegarLoop]: trace histogram [63, 59, 17, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:27,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-11-02 23:03:27,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:27,722 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:27,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:27,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2073689603, now seen corresponding path program 58 times [2021-11-02 23:03:27,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:27,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31749333] [2021-11-02 23:03:27,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:27,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:29,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4122 backedges. 420 proven. 3540 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-02 23:03:29,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:29,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31749333] [2021-11-02 23:03:29,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31749333] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:29,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518316775] [2021-11-02 23:03:29,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:03:29,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:29,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:29,286 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:29,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-02 23:03:30,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:03:30,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:30,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-02 23:03:30,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:31,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4122 backedges. 420 proven. 3540 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-02 23:03:31,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518316775] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:31,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:31,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2021-11-02 23:03:31,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396784641] [2021-11-02 23:03:31,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-02 23:03:31,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:31,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-02 23:03:31,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-11-02 23:03:31,361 INFO L87 Difference]: Start difference. First operand 151 states and 156 transitions. Second operand has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:31,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:31,562 INFO L93 Difference]: Finished difference Result 184 states and 195 transitions. [2021-11-02 23:03:31,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-02 23:03:31,563 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 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 150 [2021-11-02 23:03:31,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:31,564 INFO L225 Difference]: With dead ends: 184 [2021-11-02 23:03:31,564 INFO L226 Difference]: Without dead ends: 153 [2021-11-02 23:03:31,565 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-11-02 23:03:31,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-02 23:03:31,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-11-02 23:03:31,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.0394736842105263) internal successors, (158), 152 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:31,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 158 transitions. [2021-11-02 23:03:31,578 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 158 transitions. Word has length 150 [2021-11-02 23:03:31,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:31,579 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 158 transitions. [2021-11-02 23:03:31,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:31,579 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 158 transitions. [2021-11-02 23:03:31,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-02 23:03:31,580 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:31,580 INFO L513 BasicCegarLoop]: trace histogram [64, 60, 17, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:31,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:31,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-11-02 23:03:31,803 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:31,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:31,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1479621414, now seen corresponding path program 59 times [2021-11-02 23:03:31,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:31,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901747058] [2021-11-02 23:03:31,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:31,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:31,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:33,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4249 backedges. 427 proven. 3660 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-02 23:03:33,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:33,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901747058] [2021-11-02 23:03:33,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901747058] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:33,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678525677] [2021-11-02 23:03:33,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:03:33,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:33,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:33,435 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:33,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-02 23:03:35,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) [2021-11-02 23:03:35,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:35,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-02 23:03:35,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:35,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4249 backedges. 427 proven. 3660 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-02 23:03:35,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678525677] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:35,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:35,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2021-11-02 23:03:35,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742258765] [2021-11-02 23:03:35,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-02 23:03:35,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:35,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-02 23:03:35,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-11-02 23:03:35,580 INFO L87 Difference]: Start difference. First operand 153 states and 158 transitions. Second operand has 64 states, 64 states have (on average 2.109375) internal successors, (135), 64 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) [2021-11-02 23:03:35,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:35,761 INFO L93 Difference]: Finished difference Result 186 states and 197 transitions. [2021-11-02 23:03:35,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-02 23:03:35,762 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.109375) internal successors, (135), 64 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) Word has length 152 [2021-11-02 23:03:35,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:35,763 INFO L225 Difference]: With dead ends: 186 [2021-11-02 23:03:35,763 INFO L226 Difference]: Without dead ends: 155 [2021-11-02 23:03:35,764 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-11-02 23:03:35,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-02 23:03:35,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-11-02 23:03:35,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0389610389610389) internal successors, (160), 154 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:35,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 160 transitions. [2021-11-02 23:03:35,779 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 160 transitions. Word has length 152 [2021-11-02 23:03:35,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:35,779 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 160 transitions. [2021-11-02 23:03:35,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.109375) internal successors, (135), 64 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) [2021-11-02 23:03:35,780 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 160 transitions. [2021-11-02 23:03:35,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-02 23:03:35,781 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:35,781 INFO L513 BasicCegarLoop]: trace histogram [65, 61, 17, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:35,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:35,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:35,995 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:35,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:35,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1810742153, now seen corresponding path program 60 times [2021-11-02 23:03:35,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:35,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503024555] [2021-11-02 23:03:35,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:35,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:36,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4378 backedges. 434 proven. 3782 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-02 23:03:37,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:37,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503024555] [2021-11-02 23:03:37,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503024555] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:37,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685039384] [2021-11-02 23:03:37,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:03:37,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:37,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:37,518 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:37,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-02 23:03:39,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-02 23:03:39,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:39,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:03:39,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:39,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4378 backedges. 549 proven. 16 refuted. 0 times theorem prover too weak. 3813 trivial. 0 not checked. [2021-11-02 23:03:39,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685039384] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:39,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:39,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 7] total 69 [2021-11-02 23:03:39,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089882845] [2021-11-02 23:03:39,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-02 23:03:39,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:39,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-02 23:03:39,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-11-02 23:03:39,661 INFO L87 Difference]: Start difference. First operand 155 states and 160 transitions. Second operand has 69 states, 69 states have (on average 2.130434782608696) internal successors, (147), 69 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:39,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:39,927 INFO L93 Difference]: Finished difference Result 191 states and 205 transitions. [2021-11-02 23:03:39,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-02 23:03:39,928 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.130434782608696) internal successors, (147), 69 states have internal predecessors, (147), 0 states have call successors, (0), 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 [2021-11-02 23:03:39,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:39,929 INFO L225 Difference]: With dead ends: 191 [2021-11-02 23:03:39,929 INFO L226 Difference]: Without dead ends: 160 [2021-11-02 23:03:39,930 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-11-02 23:03:39,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-02 23:03:39,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2021-11-02 23:03:39,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0443037974683544) internal successors, (165), 158 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:39,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 165 transitions. [2021-11-02 23:03:39,940 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 165 transitions. Word has length 154 [2021-11-02 23:03:39,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:39,940 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 165 transitions. [2021-11-02 23:03:39,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.130434782608696) internal successors, (147), 69 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:39,941 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 165 transitions. [2021-11-02 23:03:39,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-02 23:03:39,942 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:39,942 INFO L513 BasicCegarLoop]: trace histogram [67, 62, 17, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:39,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:40,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-11-02 23:03:40,155 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:40,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:40,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1823680879, now seen corresponding path program 61 times [2021-11-02 23:03:40,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:40,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683795095] [2021-11-02 23:03:40,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:40,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:40,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4642 backedges. 567 proven. 3906 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-02 23:03:41,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:41,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683795095] [2021-11-02 23:03:41,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683795095] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:41,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818281652] [2021-11-02 23:03:41,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:03:41,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:41,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:41,939 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:41,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-02 23:03:43,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:43,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-02 23:03:43,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:44,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4642 backedges. 567 proven. 3906 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-02 23:03:44,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818281652] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:44,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:44,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2021-11-02 23:03:44,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181927946] [2021-11-02 23:03:44,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-02 23:03:44,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:44,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-02 23:03:44,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-11-02 23:03:44,280 INFO L87 Difference]: Start difference. First operand 159 states and 165 transitions. Second operand has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 66 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:44,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:44,471 INFO L93 Difference]: Finished difference Result 194 states and 207 transitions. [2021-11-02 23:03:44,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-02 23:03:44,472 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 66 states have internal predecessors, (139), 0 states have call successors, (0), 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 158 [2021-11-02 23:03:44,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:44,473 INFO L225 Difference]: With dead ends: 194 [2021-11-02 23:03:44,473 INFO L226 Difference]: Without dead ends: 161 [2021-11-02 23:03:44,473 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-11-02 23:03:44,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-02 23:03:44,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-11-02 23:03:44,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.04375) internal successors, (167), 160 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) [2021-11-02 23:03:44,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 167 transitions. [2021-11-02 23:03:44,490 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 167 transitions. Word has length 158 [2021-11-02 23:03:44,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:44,490 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 167 transitions. [2021-11-02 23:03:44,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 66 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:44,491 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 167 transitions. [2021-11-02 23:03:44,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-02 23:03:44,492 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:44,492 INFO L513 BasicCegarLoop]: trace histogram [68, 63, 17, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:44,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:44,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:44,703 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:44,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:44,704 INFO L85 PathProgramCache]: Analyzing trace with hash 2092056756, now seen corresponding path program 62 times [2021-11-02 23:03:44,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:44,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385701516] [2021-11-02 23:03:44,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:44,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4777 backedges. 576 proven. 4032 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-02 23:03:46,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:46,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385701516] [2021-11-02 23:03:46,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385701516] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:46,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929496301] [2021-11-02 23:03:46,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:03:46,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:46,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:46,555 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:46,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-02 23:03:48,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:03:48,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:48,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-02 23:03:48,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:48,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4777 backedges. 576 proven. 4032 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-02 23:03:48,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929496301] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:48,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:48,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2021-11-02 23:03:48,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423199110] [2021-11-02 23:03:48,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-02 23:03:48,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:48,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-02 23:03:48,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-11-02 23:03:48,918 INFO L87 Difference]: Start difference. First operand 161 states and 167 transitions. Second operand has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 67 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:49,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:49,097 INFO L93 Difference]: Finished difference Result 196 states and 209 transitions. [2021-11-02 23:03:49,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-02 23:03:49,098 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 67 states have internal predecessors, (141), 0 states have call successors, (0), 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 160 [2021-11-02 23:03:49,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:49,099 INFO L225 Difference]: With dead ends: 196 [2021-11-02 23:03:49,099 INFO L226 Difference]: Without dead ends: 163 [2021-11-02 23:03:49,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-11-02 23:03:49,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-02 23:03:49,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2021-11-02 23:03:49,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0432098765432098) internal successors, (169), 162 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:49,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 169 transitions. [2021-11-02 23:03:49,118 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 169 transitions. Word has length 160 [2021-11-02 23:03:49,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:49,118 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 169 transitions. [2021-11-02 23:03:49,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 67 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:49,119 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 169 transitions. [2021-11-02 23:03:49,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-02 23:03:49,120 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:49,120 INFO L513 BasicCegarLoop]: trace histogram [69, 64, 17, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:49,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:49,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-11-02 23:03:49,335 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:49,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:49,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1570394601, now seen corresponding path program 63 times [2021-11-02 23:03:49,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:49,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191091756] [2021-11-02 23:03:49,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:49,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:51,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4914 backedges. 585 proven. 4160 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-02 23:03:51,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:51,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191091756] [2021-11-02 23:03:51,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191091756] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:51,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570260411] [2021-11-02 23:03:51,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:03:51,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:51,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:51,238 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:51,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-02 23:03:53,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-02 23:03:53,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:53,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 23:03:53,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4914 backedges. 601 proven. 153 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2021-11-02 23:03:54,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570260411] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:54,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:54,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 23] total 88 [2021-11-02 23:03:54,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40440711] [2021-11-02 23:03:54,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-11-02 23:03:54,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:54,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-11-02 23:03:54,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2463, Invalid=5193, Unknown=0, NotChecked=0, Total=7656 [2021-11-02 23:03:54,547 INFO L87 Difference]: Start difference. First operand 163 states and 169 transitions. Second operand has 88 states, 88 states have (on average 1.9431818181818181) internal successors, (171), 88 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:57,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:57,088 INFO L93 Difference]: Finished difference Result 229 states and 258 transitions. [2021-11-02 23:03:57,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-02 23:03:57,089 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.9431818181818181) internal successors, (171), 88 states have internal predecessors, (171), 0 states have call successors, (0), 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 [2021-11-02 23:03:57,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:57,090 INFO L225 Difference]: With dead ends: 229 [2021-11-02 23:03:57,090 INFO L226 Difference]: Without dead ends: 196 [2021-11-02 23:03:57,091 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3834 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=7858, Invalid=15398, Unknown=0, NotChecked=0, Total=23256 [2021-11-02 23:03:57,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-02 23:03:57,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 166. [2021-11-02 23:03:57,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.0424242424242425) internal successors, (172), 165 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:57,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 172 transitions. [2021-11-02 23:03:57,111 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 172 transitions. Word has length 162 [2021-11-02 23:03:57,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:57,111 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 172 transitions. [2021-11-02 23:03:57,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.9431818181818181) internal successors, (171), 88 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:57,111 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 172 transitions. [2021-11-02 23:03:57,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-02 23:03:57,113 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:57,113 INFO L513 BasicCegarLoop]: trace histogram [70, 65, 18, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:57,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-11-02 23:03:57,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:57,331 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:57,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:57,331 INFO L85 PathProgramCache]: Analyzing trace with hash -175115790, now seen corresponding path program 64 times [2021-11-02 23:03:57,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:57,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417664886] [2021-11-02 23:03:57,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:57,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:57,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 594 proven. 4290 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-02 23:03:59,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:59,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417664886] [2021-11-02 23:03:59,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417664886] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:59,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64469595] [2021-11-02 23:03:59,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:03:59,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:03:59,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:03:59,349 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:03:59,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-02 23:04:01,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:04:01,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:04:01,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-02 23:04:01,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:01,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 594 proven. 4290 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-02 23:04:01,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64469595] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:01,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:01,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2021-11-02 23:04:01,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907505540] [2021-11-02 23:04:01,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-02 23:04:01,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:01,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-02 23:04:01,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-11-02 23:04:01,699 INFO L87 Difference]: Start difference. First operand 166 states and 172 transitions. Second operand has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:01,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:01,877 INFO L93 Difference]: Finished difference Result 202 states and 215 transitions. [2021-11-02 23:04:01,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-02 23:04:01,877 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 0 states have call successors, (0), 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 165 [2021-11-02 23:04:01,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:01,878 INFO L225 Difference]: With dead ends: 202 [2021-11-02 23:04:01,878 INFO L226 Difference]: Without dead ends: 168 [2021-11-02 23:04:01,878 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-11-02 23:04:01,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-02 23:04:01,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-11-02 23:04:01,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0419161676646707) internal successors, (174), 167 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) [2021-11-02 23:04:01,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 174 transitions. [2021-11-02 23:04:01,890 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 174 transitions. Word has length 165 [2021-11-02 23:04:01,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:01,891 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 174 transitions. [2021-11-02 23:04:01,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:01,891 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 174 transitions. [2021-11-02 23:04:01,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-02 23:04:01,891 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:01,892 INFO L513 BasicCegarLoop]: trace histogram [71, 66, 18, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:01,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-11-02 23:04:02,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:02,095 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:02,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:02,095 INFO L85 PathProgramCache]: Analyzing trace with hash 283667055, now seen corresponding path program 65 times [2021-11-02 23:04:02,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:02,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841960908] [2021-11-02 23:04:02,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:02,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:03,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5212 backedges. 603 proven. 4422 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-02 23:04:03,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:03,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841960908] [2021-11-02 23:04:03,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841960908] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:03,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968392436] [2021-11-02 23:04:03,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:04:03,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:03,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:03,674 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:03,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-02 23:04:05,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2021-11-02 23:04:05,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:04:05,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-02 23:04:05,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5212 backedges. 603 proven. 4422 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-02 23:04:05,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968392436] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:05,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:05,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2021-11-02 23:04:05,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999166341] [2021-11-02 23:04:05,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-02 23:04:05,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:05,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-02 23:04:05,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-11-02 23:04:05,828 INFO L87 Difference]: Start difference. First operand 168 states and 174 transitions. Second operand has 70 states, 70 states have (on average 2.1) internal successors, (147), 70 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:05,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:05,969 INFO L93 Difference]: Finished difference Result 204 states and 217 transitions. [2021-11-02 23:04:05,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-02 23:04:05,969 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1) internal successors, (147), 70 states have internal predecessors, (147), 0 states have call successors, (0), 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 167 [2021-11-02 23:04:05,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:05,970 INFO L225 Difference]: With dead ends: 204 [2021-11-02 23:04:05,970 INFO L226 Difference]: Without dead ends: 170 [2021-11-02 23:04:05,971 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-11-02 23:04:05,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-02 23:04:05,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2021-11-02 23:04:05,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.0414201183431953) internal successors, (176), 169 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) [2021-11-02 23:04:05,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 176 transitions. [2021-11-02 23:04:05,981 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 176 transitions. Word has length 167 [2021-11-02 23:04:05,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:05,982 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 176 transitions. [2021-11-02 23:04:05,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.1) internal successors, (147), 70 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:05,982 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 176 transitions. [2021-11-02 23:04:05,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-02 23:04:05,983 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:05,983 INFO L513 BasicCegarLoop]: trace histogram [72, 67, 18, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:06,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-11-02 23:04:06,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-11-02 23:04:06,187 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:06,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:06,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1207650388, now seen corresponding path program 66 times [2021-11-02 23:04:06,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:06,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131813263] [2021-11-02 23:04:06,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:06,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5355 backedges. 612 proven. 4556 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-02 23:04:07,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:07,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131813263] [2021-11-02 23:04:07,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131813263] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:07,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404589283] [2021-11-02 23:04:07,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:04:07,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:07,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:07,796 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:07,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-02 23:04:09,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-02 23:04:09,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:04:09,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 23:04:09,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:10,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5355 backedges. 628 proven. 171 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2021-11-02 23:04:10,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404589283] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:10,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:10,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 24] total 92 [2021-11-02 23:04:10,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236371384] [2021-11-02 23:04:10,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-11-02 23:04:10,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:10,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-11-02 23:04:10,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2690, Invalid=5682, Unknown=0, NotChecked=0, Total=8372 [2021-11-02 23:04:10,539 INFO L87 Difference]: Start difference. First operand 170 states and 176 transitions. Second operand has 92 states, 92 states have (on average 1.934782608695652) internal successors, (178), 92 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:12,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:12,686 INFO L93 Difference]: Finished difference Result 237 states and 266 transitions. [2021-11-02 23:04:12,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-11-02 23:04:12,686 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.934782608695652) internal successors, (178), 92 states have internal predecessors, (178), 0 states have call successors, (0), 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 169 [2021-11-02 23:04:12,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:12,687 INFO L225 Difference]: With dead ends: 237 [2021-11-02 23:04:12,687 INFO L226 Difference]: Without dead ends: 203 [2021-11-02 23:04:12,688 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4184 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=8606, Invalid=16834, Unknown=0, NotChecked=0, Total=25440 [2021-11-02 23:04:12,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-02 23:04:12,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 173. [2021-11-02 23:04:12,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0406976744186047) internal successors, (179), 172 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) [2021-11-02 23:04:12,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 179 transitions. [2021-11-02 23:04:12,697 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 179 transitions. Word has length 169 [2021-11-02 23:04:12,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:12,697 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 179 transitions. [2021-11-02 23:04:12,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.934782608695652) internal successors, (178), 92 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:12,697 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 179 transitions. [2021-11-02 23:04:12,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-02 23:04:12,698 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:12,698 INFO L513 BasicCegarLoop]: trace histogram [73, 68, 19, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:12,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-11-02 23:04:12,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:12,899 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:12,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:12,899 INFO L85 PathProgramCache]: Analyzing trace with hash 522974435, now seen corresponding path program 67 times [2021-11-02 23:04:12,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:12,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795090732] [2021-11-02 23:04:12,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:12,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:14,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5519 backedges. 621 proven. 4692 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-11-02 23:04:14,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:14,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795090732] [2021-11-02 23:04:14,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795090732] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:14,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582374324] [2021-11-02 23:04:14,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:04:14,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:14,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:14,561 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:14,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-02 23:04:16,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:16,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-02 23:04:16,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5519 backedges. 621 proven. 4692 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-11-02 23:04:16,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582374324] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:16,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:16,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2021-11-02 23:04:16,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104701532] [2021-11-02 23:04:16,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-02 23:04:16,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:16,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-02 23:04:16,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-11-02 23:04:16,781 INFO L87 Difference]: Start difference. First operand 173 states and 179 transitions. Second operand has 72 states, 72 states have (on average 2.0972222222222223) internal successors, (151), 72 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) [2021-11-02 23:04:16,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:16,935 INFO L93 Difference]: Finished difference Result 210 states and 223 transitions. [2021-11-02 23:04:16,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-02 23:04:16,936 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0972222222222223) internal successors, (151), 72 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) Word has length 172 [2021-11-02 23:04:16,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:16,937 INFO L225 Difference]: With dead ends: 210 [2021-11-02 23:04:16,937 INFO L226 Difference]: Without dead ends: 175 [2021-11-02 23:04:16,937 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-11-02 23:04:16,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-02 23:04:16,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2021-11-02 23:04:16,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0402298850574712) internal successors, (181), 174 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:16,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 181 transitions. [2021-11-02 23:04:16,951 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 181 transitions. Word has length 172 [2021-11-02 23:04:16,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:16,951 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 181 transitions. [2021-11-02 23:04:16,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0972222222222223) internal successors, (151), 72 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) [2021-11-02 23:04:16,952 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 181 transitions. [2021-11-02 23:04:16,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-02 23:04:16,953 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:16,953 INFO L513 BasicCegarLoop]: trace histogram [74, 69, 19, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:16,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-11-02 23:04:17,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:17,179 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:17,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:17,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1456432582, now seen corresponding path program 68 times [2021-11-02 23:04:17,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:17,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402622204] [2021-11-02 23:04:17,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:17,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:17,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5666 backedges. 630 proven. 4830 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-11-02 23:04:18,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:18,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402622204] [2021-11-02 23:04:18,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402622204] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:18,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776633682] [2021-11-02 23:04:18,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:04:18,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:18,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:18,894 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:18,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-11-02 23:04:20,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:04:20,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:04:20,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-02 23:04:20,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5666 backedges. 630 proven. 4830 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-11-02 23:04:21,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776633682] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:21,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:21,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2021-11-02 23:04:21,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390021332] [2021-11-02 23:04:21,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-02 23:04:21,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:21,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-02 23:04:21,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-11-02 23:04:21,114 INFO L87 Difference]: Start difference. First operand 175 states and 181 transitions. Second operand has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 73 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) [2021-11-02 23:04:21,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:21,282 INFO L93 Difference]: Finished difference Result 212 states and 225 transitions. [2021-11-02 23:04:21,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-02 23:04:21,282 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 73 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) Word has length 174 [2021-11-02 23:04:21,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:21,283 INFO L225 Difference]: With dead ends: 212 [2021-11-02 23:04:21,283 INFO L226 Difference]: Without dead ends: 177 [2021-11-02 23:04:21,284 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-11-02 23:04:21,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-02 23:04:21,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-11-02 23:04:21,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.0397727272727273) internal successors, (183), 176 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:21,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 183 transitions. [2021-11-02 23:04:21,298 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 183 transitions. Word has length 174 [2021-11-02 23:04:21,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:21,298 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 183 transitions. [2021-11-02 23:04:21,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 73 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) [2021-11-02 23:04:21,298 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 183 transitions. [2021-11-02 23:04:21,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-02 23:04:21,299 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:21,300 INFO L513 BasicCegarLoop]: trace histogram [75, 70, 19, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:21,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-11-02 23:04:21,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-11-02 23:04:21,523 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:21,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:21,523 INFO L85 PathProgramCache]: Analyzing trace with hash 861546985, now seen corresponding path program 69 times [2021-11-02 23:04:21,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:21,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656074550] [2021-11-02 23:04:21,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:21,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5815 backedges. 639 proven. 4970 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-11-02 23:04:23,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:23,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656074550] [2021-11-02 23:04:23,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656074550] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:23,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461747875] [2021-11-02 23:04:23,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:04:23,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:23,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:23,280 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:23,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-02 23:04:25,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-02 23:04:25,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:04:25,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-02 23:04:25,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:26,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5815 backedges. 655 proven. 190 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2021-11-02 23:04:26,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461747875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:26,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:26,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 25] total 96 [2021-11-02 23:04:26,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030629630] [2021-11-02 23:04:26,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-02 23:04:26,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:26,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-02 23:04:26,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2927, Invalid=6193, Unknown=0, NotChecked=0, Total=9120 [2021-11-02 23:04:26,318 INFO L87 Difference]: Start difference. First operand 177 states and 183 transitions. Second operand has 96 states, 96 states have (on average 1.9270833333333333) internal successors, (185), 96 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:28,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:28,562 INFO L93 Difference]: Finished difference Result 245 states and 274 transitions. [2021-11-02 23:04:28,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-02 23:04:28,562 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.9270833333333333) internal successors, (185), 96 states have internal predecessors, (185), 0 states have call successors, (0), 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 176 [2021-11-02 23:04:28,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:28,564 INFO L225 Difference]: With dead ends: 245 [2021-11-02 23:04:28,564 INFO L226 Difference]: Without dead ends: 210 [2021-11-02 23:04:28,566 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4549 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=9388, Invalid=18334, Unknown=0, NotChecked=0, Total=27722 [2021-11-02 23:04:28,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-02 23:04:28,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 180. [2021-11-02 23:04:28,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.0391061452513966) internal successors, (186), 179 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) [2021-11-02 23:04:28,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 186 transitions. [2021-11-02 23:04:28,582 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 186 transitions. Word has length 176 [2021-11-02 23:04:28,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:28,582 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 186 transitions. [2021-11-02 23:04:28,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.9270833333333333) internal successors, (185), 96 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:28,583 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 186 transitions. [2021-11-02 23:04:28,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-02 23:04:28,584 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:28,584 INFO L513 BasicCegarLoop]: trace histogram [76, 71, 20, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:28,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-11-02 23:04:28,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-11-02 23:04:28,811 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:28,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:28,811 INFO L85 PathProgramCache]: Analyzing trace with hash -261938784, now seen corresponding path program 70 times [2021-11-02 23:04:28,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:28,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640817749] [2021-11-02 23:04:28,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:28,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:28,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5986 backedges. 648 proven. 5112 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-11-02 23:04:30,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:30,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640817749] [2021-11-02 23:04:30,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640817749] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:30,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947649039] [2021-11-02 23:04:30,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:04:30,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:30,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:30,647 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:30,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-02 23:04:32,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:04:32,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:04:32,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-02 23:04:32,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:33,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5986 backedges. 648 proven. 5112 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-11-02 23:04:33,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947649039] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:33,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:33,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2021-11-02 23:04:33,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645353291] [2021-11-02 23:04:33,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-02 23:04:33,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:33,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-02 23:04:33,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-11-02 23:04:33,057 INFO L87 Difference]: Start difference. First operand 180 states and 186 transitions. Second operand has 75 states, 75 states have (on average 2.0933333333333333) internal successors, (157), 75 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:33,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:33,215 INFO L93 Difference]: Finished difference Result 218 states and 231 transitions. [2021-11-02 23:04:33,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-02 23:04:33,215 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.0933333333333333) internal successors, (157), 75 states have internal predecessors, (157), 0 states have call successors, (0), 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 179 [2021-11-02 23:04:33,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:33,220 INFO L225 Difference]: With dead ends: 218 [2021-11-02 23:04:33,220 INFO L226 Difference]: Without dead ends: 182 [2021-11-02 23:04:33,220 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-11-02 23:04:33,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-02 23:04:33,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-11-02 23:04:33,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.0386740331491713) internal successors, (188), 181 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:33,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 188 transitions. [2021-11-02 23:04:33,236 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 188 transitions. Word has length 179 [2021-11-02 23:04:33,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:33,236 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 188 transitions. [2021-11-02 23:04:33,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.0933333333333333) internal successors, (157), 75 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:33,236 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 188 transitions. [2021-11-02 23:04:33,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-02 23:04:33,237 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:33,238 INFO L513 BasicCegarLoop]: trace histogram [77, 72, 20, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:33,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-11-02 23:04:33,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:33,453 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:33,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:33,453 INFO L85 PathProgramCache]: Analyzing trace with hash 195853149, now seen corresponding path program 71 times [2021-11-02 23:04:33,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:33,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914997735] [2021-11-02 23:04:33,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:33,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:33,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6139 backedges. 657 proven. 5256 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-11-02 23:04:35,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:35,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914997735] [2021-11-02 23:04:35,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914997735] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:35,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274346590] [2021-11-02 23:04:35,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:04:35,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:35,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:35,339 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:35,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-11-02 23:04:37,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2021-11-02 23:04:37,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:04:37,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-02 23:04:37,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:37,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6139 backedges. 657 proven. 5256 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-11-02 23:04:37,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274346590] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:37,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:37,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2021-11-02 23:04:37,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986007692] [2021-11-02 23:04:37,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-02 23:04:37,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:37,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-02 23:04:37,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-11-02 23:04:37,937 INFO L87 Difference]: Start difference. First operand 182 states and 188 transitions. Second operand has 76 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 76 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) [2021-11-02 23:04:38,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:38,115 INFO L93 Difference]: Finished difference Result 220 states and 233 transitions. [2021-11-02 23:04:38,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-02 23:04:38,116 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 76 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) Word has length 181 [2021-11-02 23:04:38,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:38,117 INFO L225 Difference]: With dead ends: 220 [2021-11-02 23:04:38,117 INFO L226 Difference]: Without dead ends: 184 [2021-11-02 23:04:38,117 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-11-02 23:04:38,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-02 23:04:38,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2021-11-02 23:04:38,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.0382513661202186) internal successors, (190), 183 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:38,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 190 transitions. [2021-11-02 23:04:38,134 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 190 transitions. Word has length 181 [2021-11-02 23:04:38,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:38,135 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 190 transitions. [2021-11-02 23:04:38,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 76 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) [2021-11-02 23:04:38,135 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 190 transitions. [2021-11-02 23:04:38,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-02 23:04:38,136 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:38,136 INFO L513 BasicCegarLoop]: trace histogram [78, 73, 20, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:38,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-11-02 23:04:38,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:38,347 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:38,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:38,347 INFO L85 PathProgramCache]: Analyzing trace with hash 2047236570, now seen corresponding path program 72 times [2021-11-02 23:04:38,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:38,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206396184] [2021-11-02 23:04:38,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:38,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:38,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6294 backedges. 666 proven. 5402 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-11-02 23:04:40,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:40,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206396184] [2021-11-02 23:04:40,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206396184] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:40,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471084124] [2021-11-02 23:04:40,325 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:04:40,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:40,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:40,326 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:40,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-02 23:04:42,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-11-02 23:04:42,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:04:42,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 23:04:42,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6294 backedges. 682 proven. 210 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2021-11-02 23:04:43,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471084124] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:43,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:43,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 26] total 100 [2021-11-02 23:04:43,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271168256] [2021-11-02 23:04:43,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-11-02 23:04:43,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:43,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-11-02 23:04:43,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3174, Invalid=6726, Unknown=0, NotChecked=0, Total=9900 [2021-11-02 23:04:43,636 INFO L87 Difference]: Start difference. First operand 184 states and 190 transitions. Second operand has 100 states, 100 states have (on average 1.92) internal successors, (192), 100 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) [2021-11-02 23:04:46,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:46,160 INFO L93 Difference]: Finished difference Result 253 states and 282 transitions. [2021-11-02 23:04:46,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-02 23:04:46,160 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.92) internal successors, (192), 100 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) Word has length 183 [2021-11-02 23:04:46,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:46,161 INFO L225 Difference]: With dead ends: 253 [2021-11-02 23:04:46,161 INFO L226 Difference]: Without dead ends: 217 [2021-11-02 23:04:46,162 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4929 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=10204, Invalid=19898, Unknown=0, NotChecked=0, Total=30102 [2021-11-02 23:04:46,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-02 23:04:46,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 187. [2021-11-02 23:04:46,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.0376344086021505) internal successors, (193), 186 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:46,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 193 transitions. [2021-11-02 23:04:46,172 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 193 transitions. Word has length 183 [2021-11-02 23:04:46,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:46,172 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 193 transitions. [2021-11-02 23:04:46,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.92) internal successors, (192), 100 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) [2021-11-02 23:04:46,172 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 193 transitions. [2021-11-02 23:04:46,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-02 23:04:46,173 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:46,173 INFO L513 BasicCegarLoop]: trace histogram [79, 74, 21, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:46,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-11-02 23:04:46,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-11-02 23:04:46,375 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:46,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:46,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1929936693, now seen corresponding path program 73 times [2021-11-02 23:04:46,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:46,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864071138] [2021-11-02 23:04:46,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:46,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6472 backedges. 675 proven. 5550 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-02 23:04:48,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:48,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864071138] [2021-11-02 23:04:48,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864071138] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:48,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193710946] [2021-11-02 23:04:48,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:04:48,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:48,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:48,436 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:48,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-02 23:04:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:50,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-02 23:04:50,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:51,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6472 backedges. 675 proven. 5550 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-02 23:04:51,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193710946] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:51,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:51,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2021-11-02 23:04:51,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703448904] [2021-11-02 23:04:51,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-02 23:04:51,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:51,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-02 23:04:51,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-11-02 23:04:51,073 INFO L87 Difference]: Start difference. First operand 187 states and 193 transitions. Second operand has 78 states, 78 states have (on average 2.08974358974359) internal successors, (163), 78 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:51,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:51,254 INFO L93 Difference]: Finished difference Result 226 states and 239 transitions. [2021-11-02 23:04:51,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-11-02 23:04:51,254 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.08974358974359) internal successors, (163), 78 states have internal predecessors, (163), 0 states have call successors, (0), 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 186 [2021-11-02 23:04:51,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:51,255 INFO L225 Difference]: With dead ends: 226 [2021-11-02 23:04:51,255 INFO L226 Difference]: Without dead ends: 189 [2021-11-02 23:04:51,256 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-11-02 23:04:51,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-02 23:04:51,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-11-02 23:04:51,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0372340425531914) internal successors, (195), 188 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:51,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 195 transitions. [2021-11-02 23:04:51,269 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 195 transitions. Word has length 186 [2021-11-02 23:04:51,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:51,269 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 195 transitions. [2021-11-02 23:04:51,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.08974358974359) internal successors, (163), 78 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:51,269 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 195 transitions. [2021-11-02 23:04:51,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-02 23:04:51,271 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:51,272 INFO L513 BasicCegarLoop]: trace histogram [80, 75, 21, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:51,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-11-02 23:04:51,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:51,488 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:51,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:51,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1116264744, now seen corresponding path program 74 times [2021-11-02 23:04:51,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:51,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207568212] [2021-11-02 23:04:51,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:51,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:51,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:53,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6631 backedges. 684 proven. 5700 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-02 23:04:53,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:53,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207568212] [2021-11-02 23:04:53,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207568212] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:53,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934477260] [2021-11-02 23:04:53,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:04:53,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:53,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:53,549 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:53,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-11-02 23:04:55,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:04:55,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:04:55,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-02 23:04:55,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:56,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6631 backedges. 684 proven. 5700 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-02 23:04:56,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934477260] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:56,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:04:56,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2021-11-02 23:04:56,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634883277] [2021-11-02 23:04:56,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-02 23:04:56,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:04:56,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-02 23:04:56,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-11-02 23:04:56,190 INFO L87 Difference]: Start difference. First operand 189 states and 195 transitions. Second operand has 79 states, 79 states have (on average 2.088607594936709) internal successors, (165), 79 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:56,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:56,357 INFO L93 Difference]: Finished difference Result 228 states and 241 transitions. [2021-11-02 23:04:56,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-02 23:04:56,358 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.088607594936709) internal successors, (165), 79 states have internal predecessors, (165), 0 states have call successors, (0), 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 188 [2021-11-02 23:04:56,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:56,359 INFO L225 Difference]: With dead ends: 228 [2021-11-02 23:04:56,359 INFO L226 Difference]: Without dead ends: 191 [2021-11-02 23:04:56,359 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-11-02 23:04:56,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-02 23:04:56,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-11-02 23:04:56,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.0368421052631578) internal successors, (197), 190 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:56,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 197 transitions. [2021-11-02 23:04:56,376 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 197 transitions. Word has length 188 [2021-11-02 23:04:56,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:56,376 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 197 transitions. [2021-11-02 23:04:56,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.088607594936709) internal successors, (165), 79 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:04:56,376 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 197 transitions. [2021-11-02 23:04:56,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-02 23:04:56,378 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:56,378 INFO L513 BasicCegarLoop]: trace histogram [81, 76, 21, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:04:56,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-11-02 23:04:56,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-11-02 23:04:56,591 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:04:56,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:56,591 INFO L85 PathProgramCache]: Analyzing trace with hash 651850171, now seen corresponding path program 75 times [2021-11-02 23:04:56,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:04:56,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817562986] [2021-11-02 23:04:56,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:56,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:04:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6792 backedges. 693 proven. 5852 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-02 23:04:58,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:04:58,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817562986] [2021-11-02 23:04:58,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817562986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:04:58,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561558000] [2021-11-02 23:04:58,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:04:58,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:04:58,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:04:58,903 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:04:58,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-11-02 23:05:01,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-02 23:05:01,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:01,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 23:05:01,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6792 backedges. 836 proven. 25 refuted. 0 times theorem prover too weak. 5931 trivial. 0 not checked. [2021-11-02 23:05:02,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561558000] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:02,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:02,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 8] total 85 [2021-11-02 23:05:02,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257148158] [2021-11-02 23:05:02,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-02 23:05:02,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:02,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-02 23:05:02,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-11-02 23:05:02,016 INFO L87 Difference]: Start difference. First operand 191 states and 197 transitions. Second operand has 85 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 85 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) [2021-11-02 23:05:02,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:02,381 INFO L93 Difference]: Finished difference Result 233 states and 249 transitions. [2021-11-02 23:05:02,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-11-02 23:05:02,381 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 85 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) Word has length 190 [2021-11-02 23:05:02,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:02,383 INFO L225 Difference]: With dead ends: 233 [2021-11-02 23:05:02,383 INFO L226 Difference]: Without dead ends: 196 [2021-11-02 23:05:02,384 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-11-02 23:05:02,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-02 23:05:02,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2021-11-02 23:05:02,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.041237113402062) internal successors, (202), 194 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:02,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 202 transitions. [2021-11-02 23:05:02,405 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 202 transitions. Word has length 190 [2021-11-02 23:05:02,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:02,405 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 202 transitions. [2021-11-02 23:05:02,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 85 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) [2021-11-02 23:05:02,406 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 202 transitions. [2021-11-02 23:05:02,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-02 23:05:02,407 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:02,407 INFO L513 BasicCegarLoop]: trace histogram [83, 77, 21, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:02,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-11-02 23:05:02,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-11-02 23:05:02,623 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:02,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:02,623 INFO L85 PathProgramCache]: Analyzing trace with hash 185817155, now seen corresponding path program 76 times [2021-11-02 23:05:02,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:02,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354593268] [2021-11-02 23:05:02,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:02,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 858 proven. 6006 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-02 23:05:05,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:05,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354593268] [2021-11-02 23:05:05,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354593268] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:05,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754797426] [2021-11-02 23:05:05,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:05:05,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:05,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:05,247 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:05,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-02 23:05:07,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:05:07,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:07,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-02 23:05:07,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 858 proven. 6006 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-02 23:05:08,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754797426] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:08,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:08,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2021-11-02 23:05:08,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977772109] [2021-11-02 23:05:08,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-11-02 23:05:08,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:08,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-11-02 23:05:08,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-11-02 23:05:08,352 INFO L87 Difference]: Start difference. First operand 195 states and 202 transitions. Second operand has 81 states, 81 states have (on average 2.0864197530864197) internal successors, (169), 81 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:08,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:08,526 INFO L93 Difference]: Finished difference Result 236 states and 251 transitions. [2021-11-02 23:05:08,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-11-02 23:05:08,527 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0864197530864197) internal successors, (169), 81 states have internal predecessors, (169), 0 states have call successors, (0), 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 194 [2021-11-02 23:05:08,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:08,528 INFO L225 Difference]: With dead ends: 236 [2021-11-02 23:05:08,528 INFO L226 Difference]: Without dead ends: 197 [2021-11-02 23:05:08,528 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-11-02 23:05:08,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-02 23:05:08,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-11-02 23:05:08,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.0408163265306123) internal successors, (204), 196 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) [2021-11-02 23:05:08,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 204 transitions. [2021-11-02 23:05:08,540 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 204 transitions. Word has length 194 [2021-11-02 23:05:08,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:08,540 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 204 transitions. [2021-11-02 23:05:08,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0864197530864197) internal successors, (169), 81 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:08,540 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 204 transitions. [2021-11-02 23:05:08,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-02 23:05:08,541 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:08,541 INFO L513 BasicCegarLoop]: trace histogram [84, 78, 21, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:08,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:08,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:08,742 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:08,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:08,742 INFO L85 PathProgramCache]: Analyzing trace with hash 327003366, now seen corresponding path program 77 times [2021-11-02 23:05:08,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:08,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239341706] [2021-11-02 23:05:08,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:08,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7287 backedges. 869 proven. 6162 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-02 23:05:11,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:11,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239341706] [2021-11-02 23:05:11,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239341706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:11,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308059168] [2021-11-02 23:05:11,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:05:11,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:11,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:11,363 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:11,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-11-02 23:05:14,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2021-11-02 23:05:14,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:14,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-02 23:05:14,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:14,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7287 backedges. 869 proven. 6162 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-02 23:05:14,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308059168] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:14,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:14,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2021-11-02 23:05:14,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609091238] [2021-11-02 23:05:14,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-02 23:05:14,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:14,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-02 23:05:14,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-11-02 23:05:14,670 INFO L87 Difference]: Start difference. First operand 197 states and 204 transitions. Second operand has 82 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 82 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:14,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:14,892 INFO L93 Difference]: Finished difference Result 238 states and 253 transitions. [2021-11-02 23:05:14,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-02 23:05:14,892 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 82 states have internal predecessors, (171), 0 states have call successors, (0), 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 196 [2021-11-02 23:05:14,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:14,893 INFO L225 Difference]: With dead ends: 238 [2021-11-02 23:05:14,893 INFO L226 Difference]: Without dead ends: 199 [2021-11-02 23:05:14,894 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-11-02 23:05:14,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-02 23:05:14,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2021-11-02 23:05:14,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.0404040404040404) internal successors, (206), 198 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:14,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 206 transitions. [2021-11-02 23:05:14,916 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 206 transitions. Word has length 196 [2021-11-02 23:05:14,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:14,916 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 206 transitions. [2021-11-02 23:05:14,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 82 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:14,917 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 206 transitions. [2021-11-02 23:05:14,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-02 23:05:14,918 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:14,918 INFO L513 BasicCegarLoop]: trace histogram [85, 79, 21, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:14,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:15,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:15,136 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:15,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:15,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1432001335, now seen corresponding path program 78 times [2021-11-02 23:05:15,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:15,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121352785] [2021-11-02 23:05:15,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:15,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:15,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7456 backedges. 880 proven. 6320 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-02 23:05:17,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:17,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121352785] [2021-11-02 23:05:17,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121352785] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:17,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609869339] [2021-11-02 23:05:17,791 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:05:17,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:17,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:17,793 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:17,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-11-02 23:05:20,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-11-02 23:05:20,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:20,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 23:05:20,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:22,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7456 backedges. 905 proven. 231 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked. [2021-11-02 23:05:22,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609869339] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:22,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:22,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 27] total 107 [2021-11-02 23:05:22,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692583681] [2021-11-02 23:05:22,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-11-02 23:05:22,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:22,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-11-02 23:05:22,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3671, Invalid=7671, Unknown=0, NotChecked=0, Total=11342 [2021-11-02 23:05:22,059 INFO L87 Difference]: Start difference. First operand 199 states and 206 transitions. Second operand has 107 states, 107 states have (on average 1.9345794392523366) internal successors, (207), 107 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:25,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:25,564 INFO L93 Difference]: Finished difference Result 283 states and 320 transitions. [2021-11-02 23:05:25,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-02 23:05:25,565 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.9345794392523366) internal successors, (207), 107 states have internal predecessors, (207), 0 states have call successors, (0), 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 198 [2021-11-02 23:05:25,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:25,566 INFO L225 Difference]: With dead ends: 283 [2021-11-02 23:05:25,566 INFO L226 Difference]: Without dead ends: 244 [2021-11-02 23:05:25,567 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5751 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=11751, Invalid=23031, Unknown=0, NotChecked=0, Total=34782 [2021-11-02 23:05:25,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-02 23:05:25,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 202. [2021-11-02 23:05:25,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.0398009950248757) internal successors, (209), 201 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:25,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 209 transitions. [2021-11-02 23:05:25,579 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 209 transitions. Word has length 198 [2021-11-02 23:05:25,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:25,579 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 209 transitions. [2021-11-02 23:05:25,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.9345794392523366) internal successors, (207), 107 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:25,579 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 209 transitions. [2021-11-02 23:05:25,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-02 23:05:25,580 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:25,580 INFO L513 BasicCegarLoop]: trace histogram [86, 80, 22, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:25,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-11-02 23:05:25,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-11-02 23:05:25,781 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:25,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:25,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1053772032, now seen corresponding path program 79 times [2021-11-02 23:05:25,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:25,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416499661] [2021-11-02 23:05:25,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:25,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:28,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7649 backedges. 891 proven. 6480 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-11-02 23:05:28,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:28,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416499661] [2021-11-02 23:05:28,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416499661] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:28,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236202203] [2021-11-02 23:05:28,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:05:28,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:28,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:28,027 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:28,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-11-02 23:05:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:30,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-02 23:05:30,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:30,888 INFO L134 CoverageAnalysis]: Checked inductivity of 7649 backedges. 891 proven. 6480 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-11-02 23:05:30,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236202203] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:30,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:30,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2021-11-02 23:05:30,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774098263] [2021-11-02 23:05:30,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-02 23:05:30,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:30,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-02 23:05:30,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-11-02 23:05:30,890 INFO L87 Difference]: Start difference. First operand 202 states and 209 transitions. Second operand has 84 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:31,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:31,059 INFO L93 Difference]: Finished difference Result 244 states and 259 transitions. [2021-11-02 23:05:31,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-02 23:05:31,060 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 states have internal predecessors, (175), 0 states have call successors, (0), 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 201 [2021-11-02 23:05:31,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:31,061 INFO L225 Difference]: With dead ends: 244 [2021-11-02 23:05:31,061 INFO L226 Difference]: Without dead ends: 204 [2021-11-02 23:05:31,061 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-11-02 23:05:31,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-02 23:05:31,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2021-11-02 23:05:31,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0394088669950738) internal successors, (211), 203 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:31,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 211 transitions. [2021-11-02 23:05:31,074 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 211 transitions. Word has length 201 [2021-11-02 23:05:31,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:31,074 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 211 transitions. [2021-11-02 23:05:31,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:31,074 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 211 transitions. [2021-11-02 23:05:31,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-02 23:05:31,075 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:31,076 INFO L513 BasicCegarLoop]: trace histogram [87, 81, 22, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:31,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-11-02 23:05:31,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:31,291 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:31,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:31,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1419736317, now seen corresponding path program 80 times [2021-11-02 23:05:31,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:31,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340651871] [2021-11-02 23:05:31,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:31,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7822 backedges. 902 proven. 6642 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-11-02 23:05:33,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:33,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340651871] [2021-11-02 23:05:33,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340651871] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:33,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140730146] [2021-11-02 23:05:33,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:05:33,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:33,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:33,647 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:33,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-11-02 23:05:36,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:05:36,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:36,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-02 23:05:36,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7822 backedges. 902 proven. 6642 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-11-02 23:05:36,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140730146] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:36,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:36,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2021-11-02 23:05:36,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736927259] [2021-11-02 23:05:36,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-02 23:05:36,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:36,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-02 23:05:36,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-11-02 23:05:36,727 INFO L87 Difference]: Start difference. First operand 204 states and 211 transitions. Second operand has 85 states, 85 states have (on average 2.0823529411764707) internal successors, (177), 85 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:36,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:36,918 INFO L93 Difference]: Finished difference Result 246 states and 261 transitions. [2021-11-02 23:05:36,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-02 23:05:36,919 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0823529411764707) internal successors, (177), 85 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2021-11-02 23:05:36,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:36,920 INFO L225 Difference]: With dead ends: 246 [2021-11-02 23:05:36,920 INFO L226 Difference]: Without dead ends: 206 [2021-11-02 23:05:36,920 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-11-02 23:05:36,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-02 23:05:36,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2021-11-02 23:05:36,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.0390243902439025) internal successors, (213), 205 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:36,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 213 transitions. [2021-11-02 23:05:36,936 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 213 transitions. Word has length 203 [2021-11-02 23:05:36,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:36,936 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 213 transitions. [2021-11-02 23:05:36,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.0823529411764707) internal successors, (177), 85 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:36,936 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 213 transitions. [2021-11-02 23:05:36,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-02 23:05:36,938 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:36,938 INFO L513 BasicCegarLoop]: trace histogram [88, 82, 22, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:36,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:37,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:37,139 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:37,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:37,139 INFO L85 PathProgramCache]: Analyzing trace with hash -950622278, now seen corresponding path program 81 times [2021-11-02 23:05:37,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:37,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617153974] [2021-11-02 23:05:37,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:37,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:37,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:39,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7997 backedges. 913 proven. 6806 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-11-02 23:05:39,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:39,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617153974] [2021-11-02 23:05:39,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617153974] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:39,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3537847] [2021-11-02 23:05:39,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:05:39,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:39,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:39,582 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:39,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-11-02 23:05:42,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-02 23:05:42,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:42,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-02 23:05:42,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:43,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7997 backedges. 938 proven. 253 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2021-11-02 23:05:43,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3537847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:43,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:43,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 28] total 111 [2021-11-02 23:05:43,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158396916] [2021-11-02 23:05:43,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2021-11-02 23:05:43,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:43,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-11-02 23:05:43,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3947, Invalid=8263, Unknown=0, NotChecked=0, Total=12210 [2021-11-02 23:05:43,548 INFO L87 Difference]: Start difference. First operand 206 states and 213 transitions. Second operand has 111 states, 111 states have (on average 1.927927927927928) internal successors, (214), 111 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:46,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:46,842 INFO L93 Difference]: Finished difference Result 291 states and 328 transitions. [2021-11-02 23:05:46,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-11-02 23:05:46,843 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.927927927927928) internal successors, (214), 111 states have internal predecessors, (214), 0 states have call successors, (0), 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 205 [2021-11-02 23:05:46,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:46,844 INFO L225 Difference]: With dead ends: 291 [2021-11-02 23:05:46,844 INFO L226 Difference]: Without dead ends: 251 [2021-11-02 23:05:46,847 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6178 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=12662, Invalid=24780, Unknown=0, NotChecked=0, Total=37442 [2021-11-02 23:05:46,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-02 23:05:46,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 209. [2021-11-02 23:05:46,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.0384615384615385) internal successors, (216), 208 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) [2021-11-02 23:05:46,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 216 transitions. [2021-11-02 23:05:46,860 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 216 transitions. Word has length 205 [2021-11-02 23:05:46,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:46,860 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 216 transitions. [2021-11-02 23:05:46,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.927927927927928) internal successors, (214), 111 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:46,861 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 216 transitions. [2021-11-02 23:05:46,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-02 23:05:46,862 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:46,862 INFO L513 BasicCegarLoop]: trace histogram [89, 83, 23, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:46,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-11-02 23:05:47,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-11-02 23:05:47,087 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:47,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:47,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1198444267, now seen corresponding path program 82 times [2021-11-02 23:05:47,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:47,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750560886] [2021-11-02 23:05:47,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:47,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8197 backedges. 924 proven. 6972 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-02 23:05:49,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:49,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750560886] [2021-11-02 23:05:49,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750560886] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:49,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935654920] [2021-11-02 23:05:49,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:05:49,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:49,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:49,647 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:49,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-11-02 23:05:52,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:05:52,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:52,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-02 23:05:52,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:52,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8197 backedges. 924 proven. 6972 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-02 23:05:52,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935654920] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:52,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:52,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2021-11-02 23:05:52,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13172622] [2021-11-02 23:05:52,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-02 23:05:52,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:52,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-02 23:05:52,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2021-11-02 23:05:52,834 INFO L87 Difference]: Start difference. First operand 209 states and 216 transitions. Second operand has 87 states, 87 states have (on average 2.0804597701149423) internal successors, (181), 87 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:53,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:53,072 INFO L93 Difference]: Finished difference Result 252 states and 267 transitions. [2021-11-02 23:05:53,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-02 23:05:53,073 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0804597701149423) internal successors, (181), 87 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2021-11-02 23:05:53,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:53,074 INFO L225 Difference]: With dead ends: 252 [2021-11-02 23:05:53,074 INFO L226 Difference]: Without dead ends: 211 [2021-11-02 23:05:53,075 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2021-11-02 23:05:53,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-02 23:05:53,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2021-11-02 23:05:53,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.0380952380952382) internal successors, (218), 210 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:53,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 218 transitions. [2021-11-02 23:05:53,098 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 218 transitions. Word has length 208 [2021-11-02 23:05:53,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:53,098 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 218 transitions. [2021-11-02 23:05:53,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0804597701149423) internal successors, (181), 87 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:53,099 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 218 transitions. [2021-11-02 23:05:53,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-02 23:05:53,100 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:53,100 INFO L513 BasicCegarLoop]: trace histogram [90, 84, 23, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:53,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:53,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:53,327 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:53,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:53,327 INFO L85 PathProgramCache]: Analyzing trace with hash -183686024, now seen corresponding path program 83 times [2021-11-02 23:05:53,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:53,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318675876] [2021-11-02 23:05:53,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:53,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:53,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8376 backedges. 935 proven. 7140 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-02 23:05:55,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:55,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318675876] [2021-11-02 23:05:55,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318675876] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:55,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546719102] [2021-11-02 23:05:55,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:05:55,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:55,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:55,820 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:55,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-11-02 23:05:58,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 91 check-sat command(s) [2021-11-02 23:05:58,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:58,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-02 23:05:58,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8376 backedges. 935 proven. 7140 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-02 23:05:59,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546719102] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:59,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:59,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2021-11-02 23:05:59,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201433153] [2021-11-02 23:05:59,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-11-02 23:05:59,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:59,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-11-02 23:05:59,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2021-11-02 23:05:59,046 INFO L87 Difference]: Start difference. First operand 211 states and 218 transitions. Second operand has 88 states, 88 states have (on average 2.0795454545454546) internal successors, (183), 88 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:59,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:59,279 INFO L93 Difference]: Finished difference Result 254 states and 269 transitions. [2021-11-02 23:05:59,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-02 23:05:59,279 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0795454545454546) internal successors, (183), 88 states have internal predecessors, (183), 0 states have call successors, (0), 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 210 [2021-11-02 23:05:59,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:59,280 INFO L225 Difference]: With dead ends: 254 [2021-11-02 23:05:59,280 INFO L226 Difference]: Without dead ends: 213 [2021-11-02 23:05:59,281 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2021-11-02 23:05:59,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-02 23:05:59,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2021-11-02 23:05:59,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.0377358490566038) internal successors, (220), 212 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:59,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 220 transitions. [2021-11-02 23:05:59,294 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 220 transitions. Word has length 210 [2021-11-02 23:05:59,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:59,294 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 220 transitions. [2021-11-02 23:05:59,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.0795454545454546) internal successors, (183), 88 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:59,294 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 220 transitions. [2021-11-02 23:05:59,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-02 23:05:59,295 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:59,296 INFO L513 BasicCegarLoop]: trace histogram [91, 85, 23, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:59,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:59,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:59,498 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:59,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:59,498 INFO L85 PathProgramCache]: Analyzing trace with hash 41409307, now seen corresponding path program 84 times [2021-11-02 23:05:59,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:59,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690399704] [2021-11-02 23:05:59,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:59,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:01,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8557 backedges. 946 proven. 7310 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-02 23:06:01,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:01,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690399704] [2021-11-02 23:06:01,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690399704] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:01,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859949051] [2021-11-02 23:06:01,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:06:01,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:01,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:01,999 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:02,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-11-02 23:06:04,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-11-02 23:06:04,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:06:04,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-02 23:06:04,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:06,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8557 backedges. 971 proven. 276 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked. [2021-11-02 23:06:06,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859949051] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:06,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:06,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 29] total 115 [2021-11-02 23:06:06,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056478735] [2021-11-02 23:06:06,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2021-11-02 23:06:06,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:06,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-11-02 23:06:06,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4233, Invalid=8877, Unknown=0, NotChecked=0, Total=13110 [2021-11-02 23:06:06,209 INFO L87 Difference]: Start difference. First operand 213 states and 220 transitions. Second operand has 115 states, 115 states have (on average 1.9217391304347826) internal successors, (221), 115 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:09,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:09,600 INFO L93 Difference]: Finished difference Result 299 states and 336 transitions. [2021-11-02 23:06:09,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-11-02 23:06:09,600 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.9217391304347826) internal successors, (221), 115 states have internal predecessors, (221), 0 states have call successors, (0), 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 212 [2021-11-02 23:06:09,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:09,602 INFO L225 Difference]: With dead ends: 299 [2021-11-02 23:06:09,602 INFO L226 Difference]: Without dead ends: 258 [2021-11-02 23:06:09,603 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6620 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=13607, Invalid=26593, Unknown=0, NotChecked=0, Total=40200 [2021-11-02 23:06:09,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-02 23:06:09,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 216. [2021-11-02 23:06:09,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.0372093023255815) internal successors, (223), 215 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:09,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 223 transitions. [2021-11-02 23:06:09,617 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 223 transitions. Word has length 212 [2021-11-02 23:06:09,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:09,617 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 223 transitions. [2021-11-02 23:06:09,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.9217391304347826) internal successors, (221), 115 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:09,617 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 223 transitions. [2021-11-02 23:06:09,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-02 23:06:09,618 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:09,619 INFO L513 BasicCegarLoop]: trace histogram [92, 86, 24, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:09,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-11-02 23:06:09,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-11-02 23:06:09,822 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:09,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:09,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1638556626, now seen corresponding path program 85 times [2021-11-02 23:06:09,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:09,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727513073] [2021-11-02 23:06:09,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:09,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:12,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8764 backedges. 957 proven. 7482 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-02 23:06:12,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:12,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727513073] [2021-11-02 23:06:12,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727513073] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:12,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938567627] [2021-11-02 23:06:12,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:06:12,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:12,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:12,552 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:12,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-11-02 23:06:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:15,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-02 23:06:15,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8764 backedges. 957 proven. 7482 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-02 23:06:15,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938567627] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:15,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:15,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2021-11-02 23:06:15,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899700452] [2021-11-02 23:06:15,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-11-02 23:06:15,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:15,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-11-02 23:06:15,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-11-02 23:06:15,957 INFO L87 Difference]: Start difference. First operand 216 states and 223 transitions. Second operand has 90 states, 90 states have (on average 2.077777777777778) internal successors, (187), 90 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:16,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:16,179 INFO L93 Difference]: Finished difference Result 260 states and 275 transitions. [2021-11-02 23:06:16,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-11-02 23:06:16,179 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.077777777777778) internal successors, (187), 90 states have internal predecessors, (187), 0 states have call successors, (0), 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 215 [2021-11-02 23:06:16,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:16,180 INFO L225 Difference]: With dead ends: 260 [2021-11-02 23:06:16,180 INFO L226 Difference]: Without dead ends: 218 [2021-11-02 23:06:16,181 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-11-02 23:06:16,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-02 23:06:16,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2021-11-02 23:06:16,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.0368663594470047) internal successors, (225), 217 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:16,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 225 transitions. [2021-11-02 23:06:16,196 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 225 transitions. Word has length 215 [2021-11-02 23:06:16,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:16,196 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 225 transitions. [2021-11-02 23:06:16,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.077777777777778) internal successors, (187), 90 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:16,196 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 225 transitions. [2021-11-02 23:06:16,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-02 23:06:16,197 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:16,197 INFO L513 BasicCegarLoop]: trace histogram [93, 87, 24, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:16,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-11-02 23:06:16,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:16,399 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:16,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:16,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1687001963, now seen corresponding path program 86 times [2021-11-02 23:06:16,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:16,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619895362] [2021-11-02 23:06:16,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:16,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:16,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8949 backedges. 968 proven. 7656 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-02 23:06:19,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:19,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619895362] [2021-11-02 23:06:19,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619895362] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:19,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058595339] [2021-11-02 23:06:19,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:06:19,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:19,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:19,165 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:19,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-11-02 23:06:22,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:06:22,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:06:22,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-02 23:06:22,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:22,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8949 backedges. 968 proven. 7656 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-02 23:06:22,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058595339] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:22,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:22,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 91 [2021-11-02 23:06:22,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705988869] [2021-11-02 23:06:22,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-11-02 23:06:22,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:22,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-11-02 23:06:22,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2021-11-02 23:06:22,724 INFO L87 Difference]: Start difference. First operand 218 states and 225 transitions. Second operand has 91 states, 91 states have (on average 2.076923076923077) internal successors, (189), 91 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:22,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:22,916 INFO L93 Difference]: Finished difference Result 262 states and 277 transitions. [2021-11-02 23:06:22,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-02 23:06:22,917 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.076923076923077) internal successors, (189), 91 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 217 [2021-11-02 23:06:22,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:22,918 INFO L225 Difference]: With dead ends: 262 [2021-11-02 23:06:22,918 INFO L226 Difference]: Without dead ends: 220 [2021-11-02 23:06:22,918 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2021-11-02 23:06:22,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-02 23:06:22,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2021-11-02 23:06:22,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.0365296803652968) internal successors, (227), 219 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) [2021-11-02 23:06:22,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 227 transitions. [2021-11-02 23:06:22,933 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 227 transitions. Word has length 217 [2021-11-02 23:06:22,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:22,934 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 227 transitions. [2021-11-02 23:06:22,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.076923076923077) internal successors, (189), 91 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:22,934 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 227 transitions. [2021-11-02 23:06:22,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-02 23:06:22,935 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:22,936 INFO L513 BasicCegarLoop]: trace histogram [94, 88, 24, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:22,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-11-02 23:06:23,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:23,147 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:23,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:23,147 INFO L85 PathProgramCache]: Analyzing trace with hash 2093137768, now seen corresponding path program 87 times [2021-11-02 23:06:23,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:23,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699132075] [2021-11-02 23:06:23,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:23,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:23,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9136 backedges. 979 proven. 7832 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-02 23:06:25,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:25,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699132075] [2021-11-02 23:06:25,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699132075] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:25,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471225687] [2021-11-02 23:06:25,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:06:25,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:25,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:25,880 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:25,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-11-02 23:06:28,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-02 23:06:28,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:06:28,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-02 23:06:28,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9136 backedges. 1004 proven. 300 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2021-11-02 23:06:30,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471225687] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:30,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:30,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 30] total 119 [2021-11-02 23:06:30,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126906474] [2021-11-02 23:06:30,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-11-02 23:06:30,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:30,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-11-02 23:06:30,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4529, Invalid=9513, Unknown=0, NotChecked=0, Total=14042 [2021-11-02 23:06:30,290 INFO L87 Difference]: Start difference. First operand 220 states and 227 transitions. Second operand has 119 states, 119 states have (on average 1.915966386554622) internal successors, (228), 119 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) [2021-11-02 23:06:33,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:33,783 INFO L93 Difference]: Finished difference Result 307 states and 344 transitions. [2021-11-02 23:06:33,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-11-02 23:06:33,784 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.915966386554622) internal successors, (228), 119 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 219 [2021-11-02 23:06:33,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:33,785 INFO L225 Difference]: With dead ends: 307 [2021-11-02 23:06:33,785 INFO L226 Difference]: Without dead ends: 265 [2021-11-02 23:06:33,786 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7077 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=14586, Invalid=28470, Unknown=0, NotChecked=0, Total=43056 [2021-11-02 23:06:33,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-02 23:06:33,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 223. [2021-11-02 23:06:33,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.0360360360360361) internal successors, (230), 222 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:33,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 230 transitions. [2021-11-02 23:06:33,806 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 230 transitions. Word has length 219 [2021-11-02 23:06:33,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:33,806 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 230 transitions. [2021-11-02 23:06:33,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.915966386554622) internal successors, (228), 119 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) [2021-11-02 23:06:33,806 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 230 transitions. [2021-11-02 23:06:33,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-02 23:06:33,807 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:33,807 INFO L513 BasicCegarLoop]: trace histogram [95, 89, 25, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:33,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-11-02 23:06:34,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:34,008 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:34,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:34,008 INFO L85 PathProgramCache]: Analyzing trace with hash 733320679, now seen corresponding path program 88 times [2021-11-02 23:06:34,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:34,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063969923] [2021-11-02 23:06:34,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:34,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:34,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:36,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9350 backedges. 990 proven. 8010 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-11-02 23:06:36,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:36,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063969923] [2021-11-02 23:06:36,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063969923] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:36,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736545557] [2021-11-02 23:06:36,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:06:36,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:36,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:36,764 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:36,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-11-02 23:06:39,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:06:39,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:06:39,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-02 23:06:39,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9350 backedges. 990 proven. 8010 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-11-02 23:06:40,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736545557] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:40,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:40,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 93 [2021-11-02 23:06:40,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526423503] [2021-11-02 23:06:40,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-02 23:06:40,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:40,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-02 23:06:40,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2021-11-02 23:06:40,290 INFO L87 Difference]: Start difference. First operand 223 states and 230 transitions. Second operand has 93 states, 93 states have (on average 2.075268817204301) internal successors, (193), 93 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:40,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:40,501 INFO L93 Difference]: Finished difference Result 268 states and 283 transitions. [2021-11-02 23:06:40,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-11-02 23:06:40,501 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.075268817204301) internal successors, (193), 93 states have internal predecessors, (193), 0 states have call successors, (0), 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 222 [2021-11-02 23:06:40,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:40,502 INFO L225 Difference]: With dead ends: 268 [2021-11-02 23:06:40,502 INFO L226 Difference]: Without dead ends: 225 [2021-11-02 23:06:40,503 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2021-11-02 23:06:40,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-11-02 23:06:40,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2021-11-02 23:06:40,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.0357142857142858) internal successors, (232), 224 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:40,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 232 transitions. [2021-11-02 23:06:40,517 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 232 transitions. Word has length 222 [2021-11-02 23:06:40,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:40,517 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 232 transitions. [2021-11-02 23:06:40,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.075268817204301) internal successors, (193), 93 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:40,517 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 232 transitions. [2021-11-02 23:06:40,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-02 23:06:40,518 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:40,518 INFO L513 BasicCegarLoop]: trace histogram [96, 90, 25, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:40,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-11-02 23:06:40,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:40,719 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:40,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:40,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1442342922, now seen corresponding path program 89 times [2021-11-02 23:06:40,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:40,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63533914] [2021-11-02 23:06:40,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:40,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:40,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9541 backedges. 1001 proven. 8190 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-11-02 23:06:43,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:43,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63533914] [2021-11-02 23:06:43,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63533914] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:43,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888979522] [2021-11-02 23:06:43,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:06:43,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:43,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:43,585 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:43,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-11-02 23:06:46,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 97 check-sat command(s) [2021-11-02 23:06:46,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:06:46,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-02 23:06:46,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9541 backedges. 1001 proven. 8190 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-11-02 23:06:47,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888979522] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:47,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:47,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2021-11-02 23:06:47,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033146175] [2021-11-02 23:06:47,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-02 23:06:47,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:47,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-02 23:06:47,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-11-02 23:06:47,428 INFO L87 Difference]: Start difference. First operand 225 states and 232 transitions. Second operand has 94 states, 94 states have (on average 2.074468085106383) internal successors, (195), 94 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:47,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:47,704 INFO L93 Difference]: Finished difference Result 270 states and 285 transitions. [2021-11-02 23:06:47,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-11-02 23:06:47,705 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.074468085106383) internal successors, (195), 94 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2021-11-02 23:06:47,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:47,706 INFO L225 Difference]: With dead ends: 270 [2021-11-02 23:06:47,706 INFO L226 Difference]: Without dead ends: 227 [2021-11-02 23:06:47,706 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-11-02 23:06:47,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-02 23:06:47,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2021-11-02 23:06:47,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.0353982300884956) internal successors, (234), 226 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) [2021-11-02 23:06:47,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 234 transitions. [2021-11-02 23:06:47,721 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 234 transitions. Word has length 224 [2021-11-02 23:06:47,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:47,721 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 234 transitions. [2021-11-02 23:06:47,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.074468085106383) internal successors, (195), 94 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:47,722 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 234 transitions. [2021-11-02 23:06:47,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-02 23:06:47,722 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:47,723 INFO L513 BasicCegarLoop]: trace histogram [97, 91, 25, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:47,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-11-02 23:06:47,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:47,923 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:47,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:47,923 INFO L85 PathProgramCache]: Analyzing trace with hash -87081619, now seen corresponding path program 90 times [2021-11-02 23:06:47,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:47,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701904605] [2021-11-02 23:06:47,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:47,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:50,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9734 backedges. 1012 proven. 8372 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-11-02 23:06:50,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:50,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701904605] [2021-11-02 23:06:50,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701904605] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:50,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22555796] [2021-11-02 23:06:50,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:06:50,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:50,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:50,979 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:50,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-11-02 23:06:54,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-11-02 23:06:54,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:06:54,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 23:06:54,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9734 backedges. 1037 proven. 325 refuted. 0 times theorem prover too weak. 8372 trivial. 0 not checked. [2021-11-02 23:06:55,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22555796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:55,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:55,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 31] total 123 [2021-11-02 23:06:55,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738550374] [2021-11-02 23:06:55,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2021-11-02 23:06:55,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:55,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-11-02 23:06:55,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4835, Invalid=10171, Unknown=0, NotChecked=0, Total=15006 [2021-11-02 23:06:55,791 INFO L87 Difference]: Start difference. First operand 227 states and 234 transitions. Second operand has 123 states, 123 states have (on average 1.910569105691057) internal successors, (235), 123 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:59,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:59,580 INFO L93 Difference]: Finished difference Result 315 states and 352 transitions. [2021-11-02 23:06:59,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-11-02 23:06:59,581 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.910569105691057) internal successors, (235), 123 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 226 [2021-11-02 23:06:59,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:59,582 INFO L225 Difference]: With dead ends: 315 [2021-11-02 23:06:59,582 INFO L226 Difference]: Without dead ends: 272 [2021-11-02 23:06:59,584 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7549 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=15599, Invalid=30411, Unknown=0, NotChecked=0, Total=46010 [2021-11-02 23:06:59,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-02 23:06:59,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 230. [2021-11-02 23:06:59,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.034934497816594) internal successors, (237), 229 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:59,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 237 transitions. [2021-11-02 23:06:59,599 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 237 transitions. Word has length 226 [2021-11-02 23:06:59,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:59,599 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 237 transitions. [2021-11-02 23:06:59,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.910569105691057) internal successors, (235), 123 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:59,599 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 237 transitions. [2021-11-02 23:06:59,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-02 23:06:59,600 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:59,600 INFO L513 BasicCegarLoop]: trace histogram [98, 92, 26, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:59,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-11-02 23:06:59,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:59,801 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:59,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:59,801 INFO L85 PathProgramCache]: Analyzing trace with hash -476322468, now seen corresponding path program 91 times [2021-11-02 23:06:59,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:59,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558152389] [2021-11-02 23:06:59,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:59,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9955 backedges. 1023 proven. 8556 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-02 23:07:02,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:02,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558152389] [2021-11-02 23:07:02,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558152389] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:02,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415735920] [2021-11-02 23:07:02,823 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:07:02,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:02,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:02,824 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:02,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-11-02 23:07:06,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:06,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 94 conjunts are in the unsatisfiable core [2021-11-02 23:07:06,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:06,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9955 backedges. 1023 proven. 8556 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-02 23:07:06,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415735920] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:06,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:06,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 96 [2021-11-02 23:07:06,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871784974] [2021-11-02 23:07:06,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-02 23:07:06,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:06,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-02 23:07:06,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-11-02 23:07:06,622 INFO L87 Difference]: Start difference. First operand 230 states and 237 transitions. Second operand has 96 states, 96 states have (on average 2.0729166666666665) internal successors, (199), 96 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:06,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:06,875 INFO L93 Difference]: Finished difference Result 276 states and 291 transitions. [2021-11-02 23:07:06,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-02 23:07:06,875 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0729166666666665) internal successors, (199), 96 states have internal predecessors, (199), 0 states have call successors, (0), 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 229 [2021-11-02 23:07:06,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:06,877 INFO L225 Difference]: With dead ends: 276 [2021-11-02 23:07:06,877 INFO L226 Difference]: Without dead ends: 232 [2021-11-02 23:07:06,877 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-11-02 23:07:06,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-02 23:07:06,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2021-11-02 23:07:06,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.0346320346320346) internal successors, (239), 231 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) [2021-11-02 23:07:06,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 239 transitions. [2021-11-02 23:07:06,901 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 239 transitions. Word has length 229 [2021-11-02 23:07:06,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:06,901 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 239 transitions. [2021-11-02 23:07:06,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0729166666666665) internal successors, (199), 96 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:06,901 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 239 transitions. [2021-11-02 23:07:06,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-02 23:07:06,902 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:06,902 INFO L513 BasicCegarLoop]: trace histogram [99, 93, 26, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:06,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:07,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:07,103 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:07,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:07,103 INFO L85 PathProgramCache]: Analyzing trace with hash -172886567, now seen corresponding path program 92 times [2021-11-02 23:07:07,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:07,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687065895] [2021-11-02 23:07:07,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:07,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:10,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10152 backedges. 1034 proven. 8742 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-02 23:07:10,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:10,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687065895] [2021-11-02 23:07:10,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687065895] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:10,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226737923] [2021-11-02 23:07:10,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:07:10,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:10,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:10,305 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:10,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-11-02 23:07:13,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:07:13,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:13,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-02 23:07:13,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:14,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10152 backedges. 1034 proven. 8742 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-02 23:07:14,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226737923] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:14,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:14,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 97 [2021-11-02 23:07:14,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068983766] [2021-11-02 23:07:14,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-02 23:07:14,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:14,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-02 23:07:14,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-11-02 23:07:14,230 INFO L87 Difference]: Start difference. First operand 232 states and 239 transitions. Second operand has 97 states, 97 states have (on average 2.0721649484536084) internal successors, (201), 97 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:14,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:14,466 INFO L93 Difference]: Finished difference Result 278 states and 293 transitions. [2021-11-02 23:07:14,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-02 23:07:14,467 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0721649484536084) internal successors, (201), 97 states have internal predecessors, (201), 0 states have call successors, (0), 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 231 [2021-11-02 23:07:14,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:14,468 INFO L225 Difference]: With dead ends: 278 [2021-11-02 23:07:14,468 INFO L226 Difference]: Without dead ends: 234 [2021-11-02 23:07:14,469 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-11-02 23:07:14,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-02 23:07:14,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2021-11-02 23:07:14,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.0343347639484979) internal successors, (241), 233 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:14,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 241 transitions. [2021-11-02 23:07:14,494 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 241 transitions. Word has length 231 [2021-11-02 23:07:14,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:14,494 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 241 transitions. [2021-11-02 23:07:14,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0721649484536084) internal successors, (201), 97 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:14,495 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 241 transitions. [2021-11-02 23:07:14,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-11-02 23:07:14,496 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:14,496 INFO L513 BasicCegarLoop]: trace histogram [100, 94, 26, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:14,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:14,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:14,712 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:14,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:14,713 INFO L85 PathProgramCache]: Analyzing trace with hash -628761834, now seen corresponding path program 93 times [2021-11-02 23:07:14,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:14,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677658014] [2021-11-02 23:07:14,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:14,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:17,943 INFO L134 CoverageAnalysis]: Checked inductivity of 10351 backedges. 1045 proven. 8930 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-02 23:07:17,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:17,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677658014] [2021-11-02 23:07:17,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677658014] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:17,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003055820] [2021-11-02 23:07:17,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:07:17,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:17,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:17,947 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:17,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-11-02 23:07:21,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-02 23:07:21,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:21,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-02 23:07:21,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 10351 backedges. 1070 proven. 351 refuted. 0 times theorem prover too weak. 8930 trivial. 0 not checked. [2021-11-02 23:07:22,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003055820] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:22,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:22,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 32] total 127 [2021-11-02 23:07:22,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315746308] [2021-11-02 23:07:22,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2021-11-02 23:07:22,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:22,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-11-02 23:07:22,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=10851, Unknown=0, NotChecked=0, Total=16002 [2021-11-02 23:07:23,000 INFO L87 Difference]: Start difference. First operand 234 states and 241 transitions. Second operand has 127 states, 127 states have (on average 1.905511811023622) internal successors, (242), 127 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:27,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:27,213 INFO L93 Difference]: Finished difference Result 323 states and 360 transitions. [2021-11-02 23:07:27,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-11-02 23:07:27,213 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.905511811023622) internal successors, (242), 127 states have internal predecessors, (242), 0 states have call successors, (0), 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 233 [2021-11-02 23:07:27,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:27,214 INFO L225 Difference]: With dead ends: 323 [2021-11-02 23:07:27,214 INFO L226 Difference]: Without dead ends: 279 [2021-11-02 23:07:27,217 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8036 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=16646, Invalid=32416, Unknown=0, NotChecked=0, Total=49062 [2021-11-02 23:07:27,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-11-02 23:07:27,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 237. [2021-11-02 23:07:27,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.0338983050847457) internal successors, (244), 236 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:27,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 244 transitions. [2021-11-02 23:07:27,239 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 244 transitions. Word has length 233 [2021-11-02 23:07:27,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:27,239 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 244 transitions. [2021-11-02 23:07:27,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.905511811023622) internal successors, (242), 127 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:27,239 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 244 transitions. [2021-11-02 23:07:27,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-02 23:07:27,241 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:27,241 INFO L513 BasicCegarLoop]: trace histogram [101, 95, 27, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:27,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-11-02 23:07:27,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:27,441 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:27,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:27,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1691395769, now seen corresponding path program 94 times [2021-11-02 23:07:27,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:27,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974753836] [2021-11-02 23:07:27,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:27,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:30,620 INFO L134 CoverageAnalysis]: Checked inductivity of 10579 backedges. 1056 proven. 9120 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2021-11-02 23:07:30,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:30,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974753836] [2021-11-02 23:07:30,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974753836] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:30,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30109110] [2021-11-02 23:07:30,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:07:30,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:30,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:30,621 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:30,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-11-02 23:07:34,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:07:34,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:34,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-02 23:07:34,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 10579 backedges. 1056 proven. 9120 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2021-11-02 23:07:34,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30109110] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:34,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:34,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 99 [2021-11-02 23:07:34,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123967566] [2021-11-02 23:07:34,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-02 23:07:34,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:34,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-02 23:07:34,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-11-02 23:07:34,567 INFO L87 Difference]: Start difference. First operand 237 states and 244 transitions. Second operand has 99 states, 99 states have (on average 2.0707070707070705) internal successors, (205), 99 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:34,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:34,829 INFO L93 Difference]: Finished difference Result 284 states and 299 transitions. [2021-11-02 23:07:34,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-11-02 23:07:34,830 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0707070707070705) internal successors, (205), 99 states have internal predecessors, (205), 0 states have call successors, (0), 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 236 [2021-11-02 23:07:34,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:34,831 INFO L225 Difference]: With dead ends: 284 [2021-11-02 23:07:34,831 INFO L226 Difference]: Without dead ends: 239 [2021-11-02 23:07:34,832 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-11-02 23:07:34,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-02 23:07:34,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2021-11-02 23:07:34,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.0336134453781514) internal successors, (246), 238 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) [2021-11-02 23:07:34,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 246 transitions. [2021-11-02 23:07:34,848 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 246 transitions. Word has length 236 [2021-11-02 23:07:34,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:34,848 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 246 transitions. [2021-11-02 23:07:34,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.0707070707070705) internal successors, (205), 99 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:34,849 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 246 transitions. [2021-11-02 23:07:34,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-02 23:07:34,849 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:34,850 INFO L513 BasicCegarLoop]: trace histogram [102, 96, 27, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:34,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-11-02 23:07:35,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-11-02 23:07:35,050 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:35,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:35,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1178894436, now seen corresponding path program 95 times [2021-11-02 23:07:35,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:35,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592984558] [2021-11-02 23:07:35,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:35,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:38,221 INFO L134 CoverageAnalysis]: Checked inductivity of 10782 backedges. 1067 proven. 9312 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2021-11-02 23:07:38,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:38,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592984558] [2021-11-02 23:07:38,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592984558] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:38,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652998274] [2021-11-02 23:07:38,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:07:38,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:38,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:38,223 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:38,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-11-02 23:07:41,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 103 check-sat command(s) [2021-11-02 23:07:41,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:41,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-02 23:07:41,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:42,404 INFO L134 CoverageAnalysis]: Checked inductivity of 10782 backedges. 1067 proven. 9312 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2021-11-02 23:07:42,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652998274] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:42,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:42,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 100 [2021-11-02 23:07:42,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569084676] [2021-11-02 23:07:42,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-11-02 23:07:42,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:42,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-11-02 23:07:42,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2021-11-02 23:07:42,407 INFO L87 Difference]: Start difference. First operand 239 states and 246 transitions. Second operand has 100 states, 100 states have (on average 2.07) internal successors, (207), 100 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:42,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:42,671 INFO L93 Difference]: Finished difference Result 286 states and 301 transitions. [2021-11-02 23:07:42,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-11-02 23:07:42,671 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.07) internal successors, (207), 100 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2021-11-02 23:07:42,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:42,672 INFO L225 Difference]: With dead ends: 286 [2021-11-02 23:07:42,673 INFO L226 Difference]: Without dead ends: 241 [2021-11-02 23:07:42,674 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2021-11-02 23:07:42,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-02 23:07:42,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2021-11-02 23:07:42,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.0333333333333334) internal successors, (248), 240 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:42,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 248 transitions. [2021-11-02 23:07:42,693 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 248 transitions. Word has length 238 [2021-11-02 23:07:42,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:42,694 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 248 transitions. [2021-11-02 23:07:42,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.07) internal successors, (207), 100 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:42,694 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 248 transitions. [2021-11-02 23:07:42,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-02 23:07:42,695 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:42,695 INFO L513 BasicCegarLoop]: trace histogram [103, 97, 27, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:42,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-11-02 23:07:42,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:42,899 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:42,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:42,899 INFO L85 PathProgramCache]: Analyzing trace with hash 2136189887, now seen corresponding path program 96 times [2021-11-02 23:07:42,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:42,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519867302] [2021-11-02 23:07:42,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:42,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:42,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 10987 backedges. 1078 proven. 9506 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2021-11-02 23:07:46,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:46,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519867302] [2021-11-02 23:07:46,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519867302] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:46,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460797055] [2021-11-02 23:07:46,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:07:46,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:46,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:46,151 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:46,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-11-02 23:07:49,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-11-02 23:07:49,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:49,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 23:07:49,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10987 backedges. 1261 proven. 36 refuted. 0 times theorem prover too weak. 9690 trivial. 0 not checked. [2021-11-02 23:07:50,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460797055] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:50,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:50,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 9] total 107 [2021-11-02 23:07:50,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294253019] [2021-11-02 23:07:50,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-11-02 23:07:50,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:50,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-11-02 23:07:50,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2021-11-02 23:07:50,627 INFO L87 Difference]: Start difference. First operand 241 states and 248 transitions. Second operand has 107 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:51,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:51,066 INFO L93 Difference]: Finished difference Result 291 states and 309 transitions. [2021-11-02 23:07:51,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-02 23:07:51,068 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 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 240 [2021-11-02 23:07:51,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:51,070 INFO L225 Difference]: With dead ends: 291 [2021-11-02 23:07:51,070 INFO L226 Difference]: Without dead ends: 246 [2021-11-02 23:07:51,071 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2021-11-02 23:07:51,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-02 23:07:51,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2021-11-02 23:07:51,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.0368852459016393) internal successors, (253), 244 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:51,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 253 transitions. [2021-11-02 23:07:51,090 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 253 transitions. Word has length 240 [2021-11-02 23:07:51,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:51,090 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 253 transitions. [2021-11-02 23:07:51,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:51,091 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 253 transitions. [2021-11-02 23:07:51,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-02 23:07:51,091 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:51,092 INFO L513 BasicCegarLoop]: trace histogram [105, 98, 27, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:51,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-11-02 23:07:51,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-11-02 23:07:51,295 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:51,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:51,295 INFO L85 PathProgramCache]: Analyzing trace with hash 476201671, now seen corresponding path program 97 times [2021-11-02 23:07:51,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:51,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305435541] [2021-11-02 23:07:51,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:51,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:54,584 INFO L134 CoverageAnalysis]: Checked inductivity of 11403 backedges. 1287 proven. 9702 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-11-02 23:07:54,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:54,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305435541] [2021-11-02 23:07:54,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305435541] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:54,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084214356] [2021-11-02 23:07:54,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:07:54,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:07:54,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:07:54,585 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:07:54,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-11-02 23:07:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:58,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-02 23:07:58,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:58,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11403 backedges. 1287 proven. 9702 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-11-02 23:07:58,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084214356] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:07:58,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:58,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 102 [2021-11-02 23:07:58,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828682040] [2021-11-02 23:07:58,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-11-02 23:07:58,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:58,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-11-02 23:07:58,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-11-02 23:07:58,749 INFO L87 Difference]: Start difference. First operand 245 states and 253 transitions. Second operand has 102 states, 102 states have (on average 2.0686274509803924) internal successors, (211), 102 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:59,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:59,015 INFO L93 Difference]: Finished difference Result 294 states and 311 transitions. [2021-11-02 23:07:59,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-11-02 23:07:59,015 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0686274509803924) internal successors, (211), 102 states have internal predecessors, (211), 0 states have call successors, (0), 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 244 [2021-11-02 23:07:59,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:59,016 INFO L225 Difference]: With dead ends: 294 [2021-11-02 23:07:59,016 INFO L226 Difference]: Without dead ends: 247 [2021-11-02 23:07:59,017 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-11-02 23:07:59,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-11-02 23:07:59,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2021-11-02 23:07:59,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.0365853658536586) internal successors, (255), 246 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:59,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 255 transitions. [2021-11-02 23:07:59,034 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 255 transitions. Word has length 244 [2021-11-02 23:07:59,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:59,034 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 255 transitions. [2021-11-02 23:07:59,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0686274509803924) internal successors, (211), 102 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:59,034 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 255 transitions. [2021-11-02 23:07:59,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-02 23:07:59,035 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:59,035 INFO L513 BasicCegarLoop]: trace histogram [106, 99, 27, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:59,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-11-02 23:07:59,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-11-02 23:07:59,236 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:59,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:59,237 INFO L85 PathProgramCache]: Analyzing trace with hash 497256618, now seen corresponding path program 98 times [2021-11-02 23:07:59,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:59,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546307969] [2021-11-02 23:07:59,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:59,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:59,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 11614 backedges. 1300 proven. 9900 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-11-02 23:08:02,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:02,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546307969] [2021-11-02 23:08:02,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546307969] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:02,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491088648] [2021-11-02 23:08:02,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:08:02,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:02,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:02,625 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:02,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-11-02 23:08:06,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:08:06,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:06,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-02 23:08:06,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:06,961 INFO L134 CoverageAnalysis]: Checked inductivity of 11614 backedges. 1300 proven. 9900 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-11-02 23:08:06,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491088648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:06,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:06,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 103 [2021-11-02 23:08:06,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64462066] [2021-11-02 23:08:06,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-11-02 23:08:06,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:06,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-11-02 23:08:06,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2021-11-02 23:08:06,964 INFO L87 Difference]: Start difference. First operand 247 states and 255 transitions. Second operand has 103 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 103 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:07,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:07,207 INFO L93 Difference]: Finished difference Result 296 states and 313 transitions. [2021-11-02 23:08:07,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-02 23:08:07,208 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 103 states have internal predecessors, (213), 0 states have call successors, (0), 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 246 [2021-11-02 23:08:07,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:07,208 INFO L225 Difference]: With dead ends: 296 [2021-11-02 23:08:07,208 INFO L226 Difference]: Without dead ends: 249 [2021-11-02 23:08:07,209 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2021-11-02 23:08:07,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-02 23:08:07,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2021-11-02 23:08:07,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.0362903225806452) internal successors, (257), 248 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:07,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 257 transitions. [2021-11-02 23:08:07,236 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 257 transitions. Word has length 246 [2021-11-02 23:08:07,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:07,236 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 257 transitions. [2021-11-02 23:08:07,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 103 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:07,236 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 257 transitions. [2021-11-02 23:08:07,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-11-02 23:08:07,237 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:07,237 INFO L513 BasicCegarLoop]: trace histogram [107, 100, 27, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:07,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-11-02 23:08:07,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-11-02 23:08:07,438 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:07,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:07,438 INFO L85 PathProgramCache]: Analyzing trace with hash -743775795, now seen corresponding path program 99 times [2021-11-02 23:08:07,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:07,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160545820] [2021-11-02 23:08:07,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:07,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:10,872 INFO L134 CoverageAnalysis]: Checked inductivity of 11827 backedges. 1313 proven. 10100 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-11-02 23:08:10,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:10,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160545820] [2021-11-02 23:08:10,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160545820] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:10,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318098332] [2021-11-02 23:08:10,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:08:10,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:10,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:10,873 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:10,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-11-02 23:08:14,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-02 23:08:14,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:14,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-02 23:08:14,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 11827 backedges. 1349 proven. 378 refuted. 0 times theorem prover too weak. 10100 trivial. 0 not checked. [2021-11-02 23:08:16,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318098332] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:16,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:16,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 34] total 135 [2021-11-02 23:08:16,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873662347] [2021-11-02 23:08:16,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2021-11-02 23:08:16,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:16,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2021-11-02 23:08:16,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5813, Invalid=12277, Unknown=0, NotChecked=0, Total=18090 [2021-11-02 23:08:16,474 INFO L87 Difference]: Start difference. First operand 249 states and 257 transitions. Second operand has 135 states, 135 states have (on average 1.9037037037037037) internal successors, (257), 135 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:21,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:21,148 INFO L93 Difference]: Finished difference Result 355 states and 401 transitions. [2021-11-02 23:08:21,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-11-02 23:08:21,148 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.9037037037037037) internal successors, (257), 135 states have internal predecessors, (257), 0 states have call successors, (0), 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 248 [2021-11-02 23:08:21,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:21,149 INFO L225 Difference]: With dead ends: 355 [2021-11-02 23:08:21,149 INFO L226 Difference]: Without dead ends: 308 [2021-11-02 23:08:21,154 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9192 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=18741, Invalid=36719, Unknown=0, NotChecked=0, Total=55460 [2021-11-02 23:08:21,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-02 23:08:21,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 252. [2021-11-02 23:08:21,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.0358565737051793) internal successors, (260), 251 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) [2021-11-02 23:08:21,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 260 transitions. [2021-11-02 23:08:21,172 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 260 transitions. Word has length 248 [2021-11-02 23:08:21,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:21,173 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 260 transitions. [2021-11-02 23:08:21,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.9037037037037037) internal successors, (257), 135 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:21,173 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 260 transitions. [2021-11-02 23:08:21,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-02 23:08:21,174 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:21,174 INFO L513 BasicCegarLoop]: trace histogram [108, 101, 28, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:21,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-11-02 23:08:21,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-11-02 23:08:21,378 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:21,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:21,378 INFO L85 PathProgramCache]: Analyzing trace with hash -2098679492, now seen corresponding path program 100 times [2021-11-02 23:08:21,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:21,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246255681] [2021-11-02 23:08:21,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:21,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:21,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12070 backedges. 1326 proven. 10302 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-02 23:08:24,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:24,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246255681] [2021-11-02 23:08:24,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246255681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:24,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051879731] [2021-11-02 23:08:24,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:08:24,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:24,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:24,915 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:24,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-11-02 23:08:28,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:08:28,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:28,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 103 conjunts are in the unsatisfiable core [2021-11-02 23:08:28,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:29,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12070 backedges. 1326 proven. 10302 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-02 23:08:29,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051879731] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:29,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:29,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 105 [2021-11-02 23:08:29,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225943998] [2021-11-02 23:08:29,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-11-02 23:08:29,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:29,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-11-02 23:08:29,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-11-02 23:08:29,361 INFO L87 Difference]: Start difference. First operand 252 states and 260 transitions. Second operand has 105 states, 105 states have (on average 2.066666666666667) internal successors, (217), 105 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:29,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:29,640 INFO L93 Difference]: Finished difference Result 302 states and 319 transitions. [2021-11-02 23:08:29,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-02 23:08:29,640 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.066666666666667) internal successors, (217), 105 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 251 [2021-11-02 23:08:29,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:29,641 INFO L225 Difference]: With dead ends: 302 [2021-11-02 23:08:29,641 INFO L226 Difference]: Without dead ends: 254 [2021-11-02 23:08:29,642 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-11-02 23:08:29,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-02 23:08:29,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-11-02 23:08:29,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.0355731225296443) internal successors, (262), 253 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:29,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 262 transitions. [2021-11-02 23:08:29,660 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 262 transitions. Word has length 251 [2021-11-02 23:08:29,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:29,660 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 262 transitions. [2021-11-02 23:08:29,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.066666666666667) internal successors, (217), 105 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:29,661 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 262 transitions. [2021-11-02 23:08:29,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-02 23:08:29,661 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:29,661 INFO L513 BasicCegarLoop]: trace histogram [109, 102, 28, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:29,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-11-02 23:08:29,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:29,862 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:29,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:29,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1807051271, now seen corresponding path program 101 times [2021-11-02 23:08:29,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:29,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311878958] [2021-11-02 23:08:29,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:29,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12287 backedges. 1339 proven. 10506 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-02 23:08:33,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:33,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311878958] [2021-11-02 23:08:33,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311878958] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:33,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562879941] [2021-11-02 23:08:33,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:08:33,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:33,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:33,436 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:33,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-11-02 23:08:37,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 110 check-sat command(s) [2021-11-02 23:08:37,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:37,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-02 23:08:37,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:38,088 INFO L134 CoverageAnalysis]: Checked inductivity of 12287 backedges. 1339 proven. 10506 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-02 23:08:38,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562879941] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:38,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:38,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 106 [2021-11-02 23:08:38,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837630344] [2021-11-02 23:08:38,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-11-02 23:08:38,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:38,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-11-02 23:08:38,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2021-11-02 23:08:38,091 INFO L87 Difference]: Start difference. First operand 254 states and 262 transitions. Second operand has 106 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:38,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:38,341 INFO L93 Difference]: Finished difference Result 304 states and 321 transitions. [2021-11-02 23:08:38,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-11-02 23:08:38,341 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 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 253 [2021-11-02 23:08:38,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:38,342 INFO L225 Difference]: With dead ends: 304 [2021-11-02 23:08:38,342 INFO L226 Difference]: Without dead ends: 256 [2021-11-02 23:08:38,343 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2021-11-02 23:08:38,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-02 23:08:38,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2021-11-02 23:08:38,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.035294117647059) internal successors, (264), 255 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:38,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 264 transitions. [2021-11-02 23:08:38,361 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 264 transitions. Word has length 253 [2021-11-02 23:08:38,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:38,362 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 264 transitions. [2021-11-02 23:08:38,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:38,362 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 264 transitions. [2021-11-02 23:08:38,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-02 23:08:38,363 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:38,363 INFO L513 BasicCegarLoop]: trace histogram [110, 103, 28, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:38,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-11-02 23:08:38,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:38,563 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:38,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:38,563 INFO L85 PathProgramCache]: Analyzing trace with hash -725205130, now seen corresponding path program 102 times [2021-11-02 23:08:38,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:38,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069856261] [2021-11-02 23:08:38,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:38,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12506 backedges. 1352 proven. 10712 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-02 23:08:42,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:42,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069856261] [2021-11-02 23:08:42,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069856261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:42,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367163145] [2021-11-02 23:08:42,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:08:42,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:42,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:42,263 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:42,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-11-02 23:08:46,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-11-02 23:08:46,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:46,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 23:08:46,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 12506 backedges. 1388 proven. 406 refuted. 0 times theorem prover too weak. 10712 trivial. 0 not checked. [2021-11-02 23:08:48,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367163145] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:48,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:48,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 35] total 139 [2021-11-02 23:08:48,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957426271] [2021-11-02 23:08:48,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2021-11-02 23:08:48,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:48,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2021-11-02 23:08:48,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6159, Invalid=13023, Unknown=0, NotChecked=0, Total=19182 [2021-11-02 23:08:48,197 INFO L87 Difference]: Start difference. First operand 256 states and 264 transitions. Second operand has 139 states, 139 states have (on average 1.8992805755395683) internal successors, (264), 139 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:53,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:53,165 INFO L93 Difference]: Finished difference Result 363 states and 409 transitions. [2021-11-02 23:08:53,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-11-02 23:08:53,165 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 1.8992805755395683) internal successors, (264), 139 states have internal predecessors, (264), 0 states have call successors, (0), 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 255 [2021-11-02 23:08:53,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:53,166 INFO L225 Difference]: With dead ends: 363 [2021-11-02 23:08:53,166 INFO L226 Difference]: Without dead ends: 315 [2021-11-02 23:08:53,171 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9729 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=19887, Invalid=38919, Unknown=0, NotChecked=0, Total=58806 [2021-11-02 23:08:53,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-02 23:08:53,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 259. [2021-11-02 23:08:53,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.0348837209302326) internal successors, (267), 258 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:53,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 267 transitions. [2021-11-02 23:08:53,191 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 267 transitions. Word has length 255 [2021-11-02 23:08:53,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:53,191 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 267 transitions. [2021-11-02 23:08:53,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 1.8992805755395683) internal successors, (264), 139 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:53,191 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 267 transitions. [2021-11-02 23:08:53,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-02 23:08:53,192 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:53,192 INFO L513 BasicCegarLoop]: trace histogram [111, 104, 29, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:53,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-11-02 23:08:53,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-11-02 23:08:53,393 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:53,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:53,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1161059815, now seen corresponding path program 103 times [2021-11-02 23:08:53,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:53,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459713383] [2021-11-02 23:08:53,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:53,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:53,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12756 backedges. 1365 proven. 10920 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2021-11-02 23:08:57,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:57,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459713383] [2021-11-02 23:08:57,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459713383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:57,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424313750] [2021-11-02 23:08:57,146 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:08:57,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:57,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:57,147 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:57,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-11-02 23:09:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:01,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-02 23:09:01,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:01,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12756 backedges. 1365 proven. 10920 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2021-11-02 23:09:01,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424313750] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:01,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:01,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 108 [2021-11-02 23:09:01,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719249589] [2021-11-02 23:09:01,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-11-02 23:09:01,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:01,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-11-02 23:09:01,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2021-11-02 23:09:01,772 INFO L87 Difference]: Start difference. First operand 259 states and 267 transitions. Second operand has 108 states, 108 states have (on average 2.064814814814815) internal successors, (223), 108 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:02,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:02,048 INFO L93 Difference]: Finished difference Result 310 states and 327 transitions. [2021-11-02 23:09:02,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-02 23:09:02,048 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.064814814814815) internal successors, (223), 108 states have internal predecessors, (223), 0 states have call successors, (0), 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 258 [2021-11-02 23:09:02,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:02,049 INFO L225 Difference]: With dead ends: 310 [2021-11-02 23:09:02,049 INFO L226 Difference]: Without dead ends: 261 [2021-11-02 23:09:02,050 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2021-11-02 23:09:02,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-02 23:09:02,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2021-11-02 23:09:02,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.0346153846153847) internal successors, (269), 260 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:02,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 269 transitions. [2021-11-02 23:09:02,070 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 269 transitions. Word has length 258 [2021-11-02 23:09:02,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:02,070 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 269 transitions. [2021-11-02 23:09:02,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.064814814814815) internal successors, (223), 108 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:02,070 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 269 transitions. [2021-11-02 23:09:02,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-02 23:09:02,071 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:02,071 INFO L513 BasicCegarLoop]: trace histogram [112, 105, 29, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:02,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-11-02 23:09:02,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-11-02 23:09:02,272 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:02,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:02,272 INFO L85 PathProgramCache]: Analyzing trace with hash -947953988, now seen corresponding path program 104 times [2021-11-02 23:09:02,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:02,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196800118] [2021-11-02 23:09:02,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:02,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:02,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:06,025 INFO L134 CoverageAnalysis]: Checked inductivity of 12979 backedges. 1378 proven. 11130 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2021-11-02 23:09:06,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:06,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196800118] [2021-11-02 23:09:06,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196800118] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:06,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770646] [2021-11-02 23:09:06,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:09:06,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:06,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:06,026 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:06,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-11-02 23:09:10,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:09:10,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:10,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 107 conjunts are in the unsatisfiable core [2021-11-02 23:09:10,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:10,780 INFO L134 CoverageAnalysis]: Checked inductivity of 12979 backedges. 1378 proven. 11130 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2021-11-02 23:09:10,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770646] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:10,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:10,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 109 [2021-11-02 23:09:10,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470002833] [2021-11-02 23:09:10,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-11-02 23:09:10,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:10,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-11-02 23:09:10,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2021-11-02 23:09:10,784 INFO L87 Difference]: Start difference. First operand 261 states and 269 transitions. Second operand has 109 states, 109 states have (on average 2.0642201834862384) internal successors, (225), 109 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:11,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:11,074 INFO L93 Difference]: Finished difference Result 312 states and 329 transitions. [2021-11-02 23:09:11,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-11-02 23:09:11,075 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0642201834862384) internal successors, (225), 109 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 260 [2021-11-02 23:09:11,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:11,075 INFO L225 Difference]: With dead ends: 312 [2021-11-02 23:09:11,076 INFO L226 Difference]: Without dead ends: 263 [2021-11-02 23:09:11,077 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2021-11-02 23:09:11,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-11-02 23:09:11,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2021-11-02 23:09:11,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.034351145038168) internal successors, (271), 262 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:11,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 271 transitions. [2021-11-02 23:09:11,097 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 271 transitions. Word has length 260 [2021-11-02 23:09:11,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:11,097 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 271 transitions. [2021-11-02 23:09:11,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0642201834862384) internal successors, (225), 109 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:11,098 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 271 transitions. [2021-11-02 23:09:11,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-02 23:09:11,098 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:11,098 INFO L513 BasicCegarLoop]: trace histogram [113, 106, 29, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:11,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-11-02 23:09:11,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:11,299 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:11,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:11,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1983282847, now seen corresponding path program 105 times [2021-11-02 23:09:11,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:11,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664123007] [2021-11-02 23:09:11,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:11,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:15,212 INFO L134 CoverageAnalysis]: Checked inductivity of 13204 backedges. 1391 proven. 11342 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2021-11-02 23:09:15,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:15,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664123007] [2021-11-02 23:09:15,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664123007] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:15,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117232326] [2021-11-02 23:09:15,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:09:15,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:15,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:15,213 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:15,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-11-02 23:09:19,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-02 23:09:19,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:19,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-02 23:09:19,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:21,448 INFO L134 CoverageAnalysis]: Checked inductivity of 13204 backedges. 1427 proven. 435 refuted. 0 times theorem prover too weak. 11342 trivial. 0 not checked. [2021-11-02 23:09:21,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117232326] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:21,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:21,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 36] total 143 [2021-11-02 23:09:21,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669264828] [2021-11-02 23:09:21,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2021-11-02 23:09:21,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:21,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2021-11-02 23:09:21,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6515, Invalid=13791, Unknown=0, NotChecked=0, Total=20306 [2021-11-02 23:09:21,451 INFO L87 Difference]: Start difference. First operand 263 states and 271 transitions. Second operand has 143 states, 143 states have (on average 1.8951048951048952) internal successors, (271), 143 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:26,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:26,868 INFO L93 Difference]: Finished difference Result 371 states and 417 transitions. [2021-11-02 23:09:26,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-11-02 23:09:26,868 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 1.8951048951048952) internal successors, (271), 143 states have internal predecessors, (271), 0 states have call successors, (0), 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 262 [2021-11-02 23:09:26,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:26,869 INFO L225 Difference]: With dead ends: 371 [2021-11-02 23:09:26,869 INFO L226 Difference]: Without dead ends: 322 [2021-11-02 23:09:26,874 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10281 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=21067, Invalid=41183, Unknown=0, NotChecked=0, Total=62250 [2021-11-02 23:09:26,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-11-02 23:09:26,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 266. [2021-11-02 23:09:26,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 1.0339622641509434) internal successors, (274), 265 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:26,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 274 transitions. [2021-11-02 23:09:26,897 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 274 transitions. Word has length 262 [2021-11-02 23:09:26,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:26,897 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 274 transitions. [2021-11-02 23:09:26,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 1.8951048951048952) internal successors, (271), 143 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:26,897 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 274 transitions. [2021-11-02 23:09:26,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-02 23:09:26,898 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:26,898 INFO L513 BasicCegarLoop]: trace histogram [114, 107, 30, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:26,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-11-02 23:09:27,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-11-02 23:09:27,099 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:27,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:27,099 INFO L85 PathProgramCache]: Analyzing trace with hash 555380714, now seen corresponding path program 106 times [2021-11-02 23:09:27,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:27,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663969450] [2021-11-02 23:09:27,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:27,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 13461 backedges. 1404 proven. 11556 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2021-11-02 23:09:31,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:31,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663969450] [2021-11-02 23:09:31,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663969450] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:31,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203825187] [2021-11-02 23:09:31,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:09:31,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:31,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:31,060 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:31,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-11-02 23:09:35,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:09:35,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:35,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 109 conjunts are in the unsatisfiable core [2021-11-02 23:09:35,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 13461 backedges. 1404 proven. 11556 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2021-11-02 23:09:35,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203825187] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:35,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:35,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 111 [2021-11-02 23:09:35,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575267959] [2021-11-02 23:09:35,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2021-11-02 23:09:35,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:35,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-11-02 23:09:35,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2021-11-02 23:09:35,950 INFO L87 Difference]: Start difference. First operand 266 states and 274 transitions. Second operand has 111 states, 111 states have (on average 2.063063063063063) internal successors, (229), 111 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:36,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:36,227 INFO L93 Difference]: Finished difference Result 318 states and 335 transitions. [2021-11-02 23:09:36,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-11-02 23:09:36,227 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.063063063063063) internal successors, (229), 111 states have internal predecessors, (229), 0 states have call successors, (0), 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 265 [2021-11-02 23:09:36,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:36,228 INFO L225 Difference]: With dead ends: 318 [2021-11-02 23:09:36,228 INFO L226 Difference]: Without dead ends: 268 [2021-11-02 23:09:36,229 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2021-11-02 23:09:36,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-02 23:09:36,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2021-11-02 23:09:36,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.0337078651685394) internal successors, (276), 267 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:36,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 276 transitions. [2021-11-02 23:09:36,249 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 276 transitions. Word has length 265 [2021-11-02 23:09:36,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:36,249 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 276 transitions. [2021-11-02 23:09:36,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.063063063063063) internal successors, (229), 111 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:36,250 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 276 transitions. [2021-11-02 23:09:36,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-02 23:09:36,250 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:36,250 INFO L513 BasicCegarLoop]: trace histogram [115, 108, 30, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:36,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-11-02 23:09:36,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:36,455 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:36,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:36,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1985660391, now seen corresponding path program 107 times [2021-11-02 23:09:36,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:36,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065341504] [2021-11-02 23:09:36,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:36,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:36,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 13690 backedges. 1417 proven. 11772 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2021-11-02 23:09:40,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:40,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065341504] [2021-11-02 23:09:40,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065341504] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:40,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423635787] [2021-11-02 23:09:40,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:09:40,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:40,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:40,438 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:40,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-11-02 23:09:44,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 116 check-sat command(s) [2021-11-02 23:09:44,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:44,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 110 conjunts are in the unsatisfiable core [2021-11-02 23:09:44,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 13690 backedges. 1417 proven. 11772 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2021-11-02 23:09:45,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423635787] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:45,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:45,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 112 [2021-11-02 23:09:45,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716549278] [2021-11-02 23:09:45,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2021-11-02 23:09:45,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:45,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-11-02 23:09:45,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2021-11-02 23:09:45,543 INFO L87 Difference]: Start difference. First operand 268 states and 276 transitions. Second operand has 112 states, 112 states have (on average 2.0625) internal successors, (231), 112 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:45,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:45,852 INFO L93 Difference]: Finished difference Result 320 states and 337 transitions. [2021-11-02 23:09:45,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-11-02 23:09:45,852 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0625) internal successors, (231), 112 states have internal predecessors, (231), 0 states have call successors, (0), 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 267 [2021-11-02 23:09:45,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:45,853 INFO L225 Difference]: With dead ends: 320 [2021-11-02 23:09:45,853 INFO L226 Difference]: Without dead ends: 270 [2021-11-02 23:09:45,854 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2021-11-02 23:09:45,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-02 23:09:45,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2021-11-02 23:09:45,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.033457249070632) internal successors, (278), 269 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:45,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 278 transitions. [2021-11-02 23:09:45,876 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 278 transitions. Word has length 267 [2021-11-02 23:09:45,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:45,876 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 278 transitions. [2021-11-02 23:09:45,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0625) internal successors, (231), 112 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:45,876 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 278 transitions. [2021-11-02 23:09:45,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-11-02 23:09:45,877 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:45,877 INFO L513 BasicCegarLoop]: trace histogram [116, 109, 30, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:45,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-11-02 23:09:46,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:46,078 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:46,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:46,078 INFO L85 PathProgramCache]: Analyzing trace with hash 2094895268, now seen corresponding path program 108 times [2021-11-02 23:09:46,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:46,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85688429] [2021-11-02 23:09:46,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:46,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:50,232 INFO L134 CoverageAnalysis]: Checked inductivity of 13921 backedges. 1430 proven. 11990 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2021-11-02 23:09:50,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:50,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85688429] [2021-11-02 23:09:50,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85688429] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:50,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403066091] [2021-11-02 23:09:50,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:09:50,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:50,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:50,233 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:50,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-11-02 23:09:54,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-11-02 23:09:54,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:54,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-02 23:09:54,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:56,899 INFO L134 CoverageAnalysis]: Checked inductivity of 13921 backedges. 1466 proven. 465 refuted. 0 times theorem prover too weak. 11990 trivial. 0 not checked. [2021-11-02 23:09:56,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403066091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:56,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:56,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 37] total 147 [2021-11-02 23:09:56,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285677541] [2021-11-02 23:09:56,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2021-11-02 23:09:56,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:56,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2021-11-02 23:09:56,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6881, Invalid=14581, Unknown=0, NotChecked=0, Total=21462 [2021-11-02 23:09:56,903 INFO L87 Difference]: Start difference. First operand 270 states and 278 transitions. Second operand has 147 states, 147 states have (on average 1.8911564625850341) internal successors, (278), 147 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:02,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:02,447 INFO L93 Difference]: Finished difference Result 379 states and 425 transitions. [2021-11-02 23:10:02,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2021-11-02 23:10:02,447 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 1.8911564625850341) internal successors, (278), 147 states have internal predecessors, (278), 0 states have call successors, (0), 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 269 [2021-11-02 23:10:02,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:02,448 INFO L225 Difference]: With dead ends: 379 [2021-11-02 23:10:02,448 INFO L226 Difference]: Without dead ends: 329 [2021-11-02 23:10:02,454 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10848 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=22281, Invalid=43511, Unknown=0, NotChecked=0, Total=65792 [2021-11-02 23:10:02,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-11-02 23:10:02,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 273. [2021-11-02 23:10:02,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.0330882352941178) internal successors, (281), 272 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:02,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 281 transitions. [2021-11-02 23:10:02,479 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 281 transitions. Word has length 269 [2021-11-02 23:10:02,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:02,479 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 281 transitions. [2021-11-02 23:10:02,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 1.8911564625850341) internal successors, (278), 147 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:02,480 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 281 transitions. [2021-11-02 23:10:02,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-02 23:10:02,480 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:02,481 INFO L513 BasicCegarLoop]: trace histogram [117, 110, 31, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:02,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:02,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:02,681 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:02,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:02,682 INFO L85 PathProgramCache]: Analyzing trace with hash -850080405, now seen corresponding path program 109 times [2021-11-02 23:10:02,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:02,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482484725] [2021-11-02 23:10:02,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:02,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:02,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:06,928 INFO L134 CoverageAnalysis]: Checked inductivity of 14185 backedges. 1443 proven. 12210 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-02 23:10:06,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:06,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482484725] [2021-11-02 23:10:06,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482484725] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:06,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748011900] [2021-11-02 23:10:06,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:10:06,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:06,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:06,930 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:06,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-11-02 23:10:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:11,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 112 conjunts are in the unsatisfiable core [2021-11-02 23:10:11,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:12,184 INFO L134 CoverageAnalysis]: Checked inductivity of 14185 backedges. 1443 proven. 12210 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-02 23:10:12,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748011900] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:12,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:12,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 114 [2021-11-02 23:10:12,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810644545] [2021-11-02 23:10:12,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2021-11-02 23:10:12,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:12,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-11-02 23:10:12,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2021-11-02 23:10:12,188 INFO L87 Difference]: Start difference. First operand 273 states and 281 transitions. Second operand has 114 states, 114 states have (on average 2.06140350877193) internal successors, (235), 114 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:12,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:12,467 INFO L93 Difference]: Finished difference Result 326 states and 343 transitions. [2021-11-02 23:10:12,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-11-02 23:10:12,468 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.06140350877193) internal successors, (235), 114 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 272 [2021-11-02 23:10:12,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:12,468 INFO L225 Difference]: With dead ends: 326 [2021-11-02 23:10:12,469 INFO L226 Difference]: Without dead ends: 275 [2021-11-02 23:10:12,470 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2021-11-02 23:10:12,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-02 23:10:12,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2021-11-02 23:10:12,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.032846715328467) internal successors, (283), 274 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:12,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 283 transitions. [2021-11-02 23:10:12,492 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 283 transitions. Word has length 272 [2021-11-02 23:10:12,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:12,493 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 283 transitions. [2021-11-02 23:10:12,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.06140350877193) internal successors, (235), 114 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:12,493 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 283 transitions. [2021-11-02 23:10:12,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-11-02 23:10:12,494 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:12,494 INFO L513 BasicCegarLoop]: trace histogram [118, 111, 31, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:12,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-11-02 23:10:12,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:12,694 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:12,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:12,695 INFO L85 PathProgramCache]: Analyzing trace with hash 2105815246, now seen corresponding path program 110 times [2021-11-02 23:10:12,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:12,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103424336] [2021-11-02 23:10:12,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:12,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 14420 backedges. 1456 proven. 12432 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-02 23:10:16,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:16,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103424336] [2021-11-02 23:10:16,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103424336] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:16,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980630434] [2021-11-02 23:10:16,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:10:16,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:16,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:16,932 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:16,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-11-02 23:10:21,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:10:21,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:21,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 113 conjunts are in the unsatisfiable core [2021-11-02 23:10:21,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:22,235 INFO L134 CoverageAnalysis]: Checked inductivity of 14420 backedges. 1456 proven. 12432 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-02 23:10:22,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980630434] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:22,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:22,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 115 [2021-11-02 23:10:22,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684496820] [2021-11-02 23:10:22,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2021-11-02 23:10:22,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:22,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-11-02 23:10:22,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2021-11-02 23:10:22,239 INFO L87 Difference]: Start difference. First operand 275 states and 283 transitions. Second operand has 115 states, 115 states have (on average 2.0608695652173914) internal successors, (237), 115 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:22,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:22,605 INFO L93 Difference]: Finished difference Result 328 states and 345 transitions. [2021-11-02 23:10:22,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-11-02 23:10:22,606 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.0608695652173914) internal successors, (237), 115 states have internal predecessors, (237), 0 states have call successors, (0), 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 274 [2021-11-02 23:10:22,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:22,606 INFO L225 Difference]: With dead ends: 328 [2021-11-02 23:10:22,607 INFO L226 Difference]: Without dead ends: 277 [2021-11-02 23:10:22,607 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2021-11-02 23:10:22,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-02 23:10:22,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2021-11-02 23:10:22,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.0326086956521738) internal successors, (285), 276 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:22,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 285 transitions. [2021-11-02 23:10:22,633 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 285 transitions. Word has length 274 [2021-11-02 23:10:22,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:22,633 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 285 transitions. [2021-11-02 23:10:22,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.0608695652173914) internal successors, (237), 115 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:22,633 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 285 transitions. [2021-11-02 23:10:22,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-11-02 23:10:22,634 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:22,634 INFO L513 BasicCegarLoop]: trace histogram [119, 112, 31, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:22,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-11-02 23:10:22,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-11-02 23:10:22,835 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:22,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:22,835 INFO L85 PathProgramCache]: Analyzing trace with hash -546814095, now seen corresponding path program 111 times [2021-11-02 23:10:22,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:22,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916952187] [2021-11-02 23:10:22,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:22,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 14657 backedges. 1469 proven. 12656 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-02 23:10:27,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:27,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916952187] [2021-11-02 23:10:27,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916952187] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:27,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429536541] [2021-11-02 23:10:27,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:10:27,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:27,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:27,121 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:27,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-11-02 23:10:31,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-02 23:10:31,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:31,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 23:10:31,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 14657 backedges. 1680 proven. 49 refuted. 0 times theorem prover too weak. 12928 trivial. 0 not checked. [2021-11-02 23:10:32,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429536541] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:32,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:32,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 10] total 123 [2021-11-02 23:10:32,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771960841] [2021-11-02 23:10:32,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2021-11-02 23:10:32,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:32,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-11-02 23:10:32,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2021-11-02 23:10:32,892 INFO L87 Difference]: Start difference. First operand 277 states and 285 transitions. Second operand has 123 states, 123 states have (on average 2.073170731707317) internal successors, (255), 123 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:33,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:33,371 INFO L93 Difference]: Finished difference Result 333 states and 353 transitions. [2021-11-02 23:10:33,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-11-02 23:10:33,371 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.073170731707317) internal successors, (255), 123 states have internal predecessors, (255), 0 states have call successors, (0), 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 276 [2021-11-02 23:10:33,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:33,372 INFO L225 Difference]: With dead ends: 333 [2021-11-02 23:10:33,372 INFO L226 Difference]: Without dead ends: 282 [2021-11-02 23:10:33,373 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2021-11-02 23:10:33,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-02 23:10:33,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2021-11-02 23:10:33,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.0357142857142858) internal successors, (290), 280 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:33,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 290 transitions. [2021-11-02 23:10:33,395 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 290 transitions. Word has length 276 [2021-11-02 23:10:33,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:33,396 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 290 transitions. [2021-11-02 23:10:33,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.073170731707317) internal successors, (255), 123 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:33,396 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 290 transitions. [2021-11-02 23:10:33,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-11-02 23:10:33,397 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:33,397 INFO L513 BasicCegarLoop]: trace histogram [121, 113, 31, 8, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:33,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-11-02 23:10:33,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-11-02 23:10:33,597 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:33,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:33,598 INFO L85 PathProgramCache]: Analyzing trace with hash -291927559, now seen corresponding path program 112 times [2021-11-02 23:10:33,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:33,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697694471] [2021-11-02 23:10:33,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:33,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 15137 backedges. 1710 proven. 12882 refuted. 0 times theorem prover too weak. 545 trivial. 0 not checked. [2021-11-02 23:10:38,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:38,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697694471] [2021-11-02 23:10:38,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697694471] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:38,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221791804] [2021-11-02 23:10:38,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:10:38,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:38,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:38,019 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:38,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-11-02 23:10:42,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:10:42,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:42,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 115 conjunts are in the unsatisfiable core [2021-11-02 23:10:42,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:43,568 INFO L134 CoverageAnalysis]: Checked inductivity of 15137 backedges. 1710 proven. 12882 refuted. 0 times theorem prover too weak. 545 trivial. 0 not checked. [2021-11-02 23:10:43,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221791804] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:43,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:43,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 117 [2021-11-02 23:10:43,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060538295] [2021-11-02 23:10:43,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2021-11-02 23:10:43,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:43,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2021-11-02 23:10:43,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2021-11-02 23:10:43,571 INFO L87 Difference]: Start difference. First operand 281 states and 290 transitions. Second operand has 117 states, 117 states have (on average 2.0598290598290596) internal successors, (241), 117 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:43,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:43,890 INFO L93 Difference]: Finished difference Result 336 states and 355 transitions. [2021-11-02 23:10:43,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-11-02 23:10:43,890 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0598290598290596) internal successors, (241), 117 states have internal predecessors, (241), 0 states have call successors, (0), 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 280 [2021-11-02 23:10:43,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:43,891 INFO L225 Difference]: With dead ends: 336 [2021-11-02 23:10:43,891 INFO L226 Difference]: Without dead ends: 283 [2021-11-02 23:10:43,892 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2021-11-02 23:10:43,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-02 23:10:43,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2021-11-02 23:10:43,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 1.0354609929078014) internal successors, (292), 282 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:43,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 292 transitions. [2021-11-02 23:10:43,915 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 292 transitions. Word has length 280 [2021-11-02 23:10:43,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:43,916 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 292 transitions. [2021-11-02 23:10:43,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.0598290598290596) internal successors, (241), 117 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:43,916 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 292 transitions. [2021-11-02 23:10:43,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-11-02 23:10:43,917 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:43,917 INFO L513 BasicCegarLoop]: trace histogram [122, 114, 31, 8, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:43,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-11-02 23:10:44,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-11-02 23:10:44,117 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:44,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:44,118 INFO L85 PathProgramCache]: Analyzing trace with hash -852698532, now seen corresponding path program 113 times [2021-11-02 23:10:44,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:44,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210121991] [2021-11-02 23:10:44,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:44,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:48,595 INFO L134 CoverageAnalysis]: Checked inductivity of 15380 backedges. 1725 proven. 13110 refuted. 0 times theorem prover too weak. 545 trivial. 0 not checked. [2021-11-02 23:10:48,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:48,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210121991] [2021-11-02 23:10:48,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210121991] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:48,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697431950] [2021-11-02 23:10:48,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:10:48,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:48,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:48,596 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:48,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-11-02 23:10:53,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 123 check-sat command(s) [2021-11-02 23:10:53,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:53,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 116 conjunts are in the unsatisfiable core [2021-11-02 23:10:53,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:54,241 INFO L134 CoverageAnalysis]: Checked inductivity of 15380 backedges. 1725 proven. 13110 refuted. 0 times theorem prover too weak. 545 trivial. 0 not checked. [2021-11-02 23:10:54,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697431950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:54,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:54,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 118 [2021-11-02 23:10:54,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102608514] [2021-11-02 23:10:54,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2021-11-02 23:10:54,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:54,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-11-02 23:10:54,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2021-11-02 23:10:54,244 INFO L87 Difference]: Start difference. First operand 283 states and 292 transitions. Second operand has 118 states, 118 states have (on average 2.059322033898305) internal successors, (243), 118 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:54,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:54,575 INFO L93 Difference]: Finished difference Result 338 states and 357 transitions. [2021-11-02 23:10:54,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-11-02 23:10:54,575 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.059322033898305) internal successors, (243), 118 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 282 [2021-11-02 23:10:54,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:54,577 INFO L225 Difference]: With dead ends: 338 [2021-11-02 23:10:54,577 INFO L226 Difference]: Without dead ends: 285 [2021-11-02 23:10:54,578 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2021-11-02 23:10:54,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-02 23:10:54,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2021-11-02 23:10:54,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.0352112676056338) internal successors, (294), 284 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) [2021-11-02 23:10:54,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 294 transitions. [2021-11-02 23:10:54,601 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 294 transitions. Word has length 282 [2021-11-02 23:10:54,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:54,601 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 294 transitions. [2021-11-02 23:10:54,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.059322033898305) internal successors, (243), 118 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:54,602 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 294 transitions. [2021-11-02 23:10:54,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-11-02 23:10:54,603 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:54,603 INFO L513 BasicCegarLoop]: trace histogram [123, 115, 31, 8, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:54,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:54,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:54,803 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:54,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:54,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1412275711, now seen corresponding path program 114 times [2021-11-02 23:10:54,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:54,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229203994] [2021-11-02 23:10:54,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:54,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:54,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:59,350 INFO L134 CoverageAnalysis]: Checked inductivity of 15625 backedges. 1740 proven. 13340 refuted. 0 times theorem prover too weak. 545 trivial. 0 not checked. [2021-11-02 23:10:59,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:59,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229203994] [2021-11-02 23:10:59,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229203994] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:59,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72032744] [2021-11-02 23:10:59,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:10:59,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:59,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:59,351 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:59,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-11-02 23:11:04,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2021-11-02 23:11:04,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:11:04,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 23:11:04,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 15625 backedges. 1789 proven. 496 refuted. 0 times theorem prover too weak. 13340 trivial. 0 not checked. [2021-11-02 23:11:06,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72032744] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:06,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:06,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 38] total 154 [2021-11-02 23:11:06,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242846553] [2021-11-02 23:11:06,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2021-11-02 23:11:06,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:06,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2021-11-02 23:11:06,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7605, Invalid=15957, Unknown=0, NotChecked=0, Total=23562 [2021-11-02 23:11:06,672 INFO L87 Difference]: Start difference. First operand 285 states and 294 transitions. Second operand has 154 states, 154 states have (on average 1.9025974025974026) internal successors, (293), 154 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:12,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:12,861 INFO L93 Difference]: Finished difference Result 413 states and 469 transitions. [2021-11-02 23:11:12,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2021-11-02 23:11:12,862 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 1.9025974025974026) internal successors, (293), 154 states have internal predecessors, (293), 0 states have call successors, (0), 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 284 [2021-11-02 23:11:12,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:12,863 INFO L225 Difference]: With dead ends: 413 [2021-11-02 23:11:12,863 INFO L226 Difference]: Without dead ends: 360 [2021-11-02 23:11:12,868 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12054 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=24541, Invalid=48089, Unknown=0, NotChecked=0, Total=72630 [2021-11-02 23:11:12,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-02 23:11:12,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 288. [2021-11-02 23:11:12,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.0348432055749128) internal successors, (297), 287 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:12,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 297 transitions. [2021-11-02 23:11:12,892 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 297 transitions. Word has length 284 [2021-11-02 23:11:12,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:12,893 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 297 transitions. [2021-11-02 23:11:12,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 1.9025974025974026) internal successors, (293), 154 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:12,893 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 297 transitions. [2021-11-02 23:11:12,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-11-02 23:11:12,894 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:12,894 INFO L513 BasicCegarLoop]: trace histogram [124, 116, 32, 8, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:12,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-11-02 23:11:13,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-11-02 23:11:13,094 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:13,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:13,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1550974774, now seen corresponding path program 115 times [2021-11-02 23:11:13,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:13,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920641724] [2021-11-02 23:11:13,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:13,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:13,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 15904 backedges. 1755 proven. 13572 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2021-11-02 23:11:17,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:17,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920641724] [2021-11-02 23:11:17,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920641724] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:17,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154257390] [2021-11-02 23:11:17,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:11:17,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:17,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:17,732 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:17,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-11-02 23:11:22,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:22,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 118 conjunts are in the unsatisfiable core [2021-11-02 23:11:22,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 15904 backedges. 1755 proven. 13572 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2021-11-02 23:11:23,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154257390] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:23,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:23,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 120 [2021-11-02 23:11:23,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440272963] [2021-11-02 23:11:23,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2021-11-02 23:11:23,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:23,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-11-02 23:11:23,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2021-11-02 23:11:23,491 INFO L87 Difference]: Start difference. First operand 288 states and 297 transitions. Second operand has 120 states, 120 states have (on average 2.058333333333333) internal successors, (247), 120 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:23,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:23,841 INFO L93 Difference]: Finished difference Result 344 states and 363 transitions. [2021-11-02 23:11:23,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-11-02 23:11:23,842 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.058333333333333) internal successors, (247), 120 states have internal predecessors, (247), 0 states have call successors, (0), 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 287 [2021-11-02 23:11:23,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:23,842 INFO L225 Difference]: With dead ends: 344 [2021-11-02 23:11:23,842 INFO L226 Difference]: Without dead ends: 290 [2021-11-02 23:11:23,844 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2021-11-02 23:11:23,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-02 23:11:23,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2021-11-02 23:11:23,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.0346020761245676) internal successors, (299), 289 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:23,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 299 transitions. [2021-11-02 23:11:23,869 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 299 transitions. Word has length 287 [2021-11-02 23:11:23,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:23,869 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 299 transitions. [2021-11-02 23:11:23,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.058333333333333) internal successors, (247), 120 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:23,870 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 299 transitions. [2021-11-02 23:11:23,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-11-02 23:11:23,870 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:23,871 INFO L513 BasicCegarLoop]: trace histogram [125, 117, 32, 8, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:23,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-11-02 23:11:24,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:24,071 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:24,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:24,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1404373767, now seen corresponding path program 116 times [2021-11-02 23:11:24,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:24,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597334369] [2021-11-02 23:11:24,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:24,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:24,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 16153 backedges. 1770 proven. 13806 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2021-11-02 23:11:28,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:28,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597334369] [2021-11-02 23:11:28,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597334369] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:28,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721562994] [2021-11-02 23:11:28,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:11:28,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:28,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:28,750 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:28,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-11-02 23:11:33,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:11:33,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:11:33,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 119 conjunts are in the unsatisfiable core [2021-11-02 23:11:33,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:34,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16153 backedges. 1770 proven. 13806 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2021-11-02 23:11:34,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721562994] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:34,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:34,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 121 [2021-11-02 23:11:34,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113715532] [2021-11-02 23:11:34,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2021-11-02 23:11:34,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:11:34,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-11-02 23:11:34,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2021-11-02 23:11:34,683 INFO L87 Difference]: Start difference. First operand 290 states and 299 transitions. Second operand has 121 states, 121 states have (on average 2.0578512396694215) internal successors, (249), 121 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:35,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:35,047 INFO L93 Difference]: Finished difference Result 346 states and 365 transitions. [2021-11-02 23:11:35,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-11-02 23:11:35,048 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.0578512396694215) internal successors, (249), 121 states have internal predecessors, (249), 0 states have call successors, (0), 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 289 [2021-11-02 23:11:35,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:35,049 INFO L225 Difference]: With dead ends: 346 [2021-11-02 23:11:35,049 INFO L226 Difference]: Without dead ends: 292 [2021-11-02 23:11:35,049 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2021-11-02 23:11:35,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-11-02 23:11:35,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2021-11-02 23:11:35,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.034364261168385) internal successors, (301), 291 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:35,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 301 transitions. [2021-11-02 23:11:35,076 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 301 transitions. Word has length 289 [2021-11-02 23:11:35,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:35,076 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 301 transitions. [2021-11-02 23:11:35,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.0578512396694215) internal successors, (249), 121 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:35,076 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 301 transitions. [2021-11-02 23:11:35,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2021-11-02 23:11:35,077 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:35,077 INFO L513 BasicCegarLoop]: trace histogram [126, 118, 32, 8, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:11:35,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-11-02 23:11:35,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:35,277 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:35,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:35,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1774028284, now seen corresponding path program 117 times [2021-11-02 23:11:35,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:11:35,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175820716] [2021-11-02 23:11:35,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:11:35,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:11:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:11:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16404 backedges. 1785 proven. 14042 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2021-11-02 23:11:40,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:11:40,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175820716] [2021-11-02 23:11:40,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175820716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:11:40,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490074862] [2021-11-02 23:11:40,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:11:40,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:11:40,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:11:40,166 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:11:40,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069e67f-0515-40b6-a1f4-cc26887357f1/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-11-02 23:11:45,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-11-02 23:11:45,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:11:45,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-02 23:11:45,362 INFO L286 TraceCheckSpWp]: Computing forward predicates...