./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/n.c24.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/n.c24.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY --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 ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:14:03,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:14:03,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:14:03,418 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:14:03,419 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:14:03,420 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:14:03,423 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:14:03,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:14:03,429 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:14:03,430 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:14:03,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:14:03,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:14:03,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:14:03,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:14:03,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:14:03,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:14:03,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:14:03,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:14:03,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:14:03,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:14:03,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:14:03,455 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:14:03,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:14:03,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:14:03,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:14:03,464 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:14:03,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:14:03,466 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:14:03,467 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:14:03,469 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:14:03,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:14:03,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:14:03,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:14:03,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:14:03,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:14:03,483 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:14:03,485 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:14:03,486 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:14:03,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:14:03,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:14:03,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:14:03,491 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:14:03,538 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:14:03,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:14:03,539 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:14:03,539 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:14:03,541 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:14:03,542 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:14:03,542 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:14:03,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:14:03,543 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:14:03,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:14:03,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:14:03,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:14:03,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:14:03,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:14:03,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:14:03,546 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:14:03,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:14:03,546 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:14:03,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:14:03,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:14:03,547 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:14:03,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:14:03,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:14:03,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:14:03,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:14:03,549 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:14:03,549 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:14:03,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:14:03,550 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:14:03,551 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:14:03,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:14:03,552 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:14:03,553 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_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d [2021-11-07 08:14:03,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:14:03,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:14:03,971 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:14:03,973 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:14:03,974 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:14:03,975 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/loops/n.c24.i [2021-11-07 08:14:04,055 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/data/864da1a31/c556872879c54a7e9409af1a1781e68c/FLAG4873c4eea [2021-11-07 08:14:04,694 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:14:04,698 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/sv-benchmarks/c/loops/n.c24.i [2021-11-07 08:14:04,711 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/data/864da1a31/c556872879c54a7e9409af1a1781e68c/FLAG4873c4eea [2021-11-07 08:14:04,985 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/data/864da1a31/c556872879c54a7e9409af1a1781e68c [2021-11-07 08:14:04,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:14:04,999 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:14:05,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:14:05,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:14:05,008 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:14:05,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:14:04" (1/1) ... [2021-11-07 08:14:05,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@697d065c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:05, skipping insertion in model container [2021-11-07 08:14:05,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:14:04" (1/1) ... [2021-11-07 08:14:05,023 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:14:05,062 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:14:05,348 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_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/sv-benchmarks/c/loops/n.c24.i[805,818] [2021-11-07 08:14:05,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:14:05,470 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:14:05,491 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_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/sv-benchmarks/c/loops/n.c24.i[805,818] [2021-11-07 08:14:05,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:14:05,547 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:14:05,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:05 WrapperNode [2021-11-07 08:14:05,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:14:05,549 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:14:05,549 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:14:05,550 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:14:05,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:05" (1/1) ... [2021-11-07 08:14:05,572 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:05" (1/1) ... [2021-11-07 08:14:05,603 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:14:05,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:14:05,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:14:05,604 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:14:05,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:05" (1/1) ... [2021-11-07 08:14:05,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:05" (1/1) ... [2021-11-07 08:14:05,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:05" (1/1) ... [2021-11-07 08:14:05,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:05" (1/1) ... [2021-11-07 08:14:05,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:05" (1/1) ... [2021-11-07 08:14:05,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:05" (1/1) ... [2021-11-07 08:14:05,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:05" (1/1) ... [2021-11-07 08:14:05,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:14:05,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:14:05,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:14:05,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:14:05,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:05" (1/1) ... [2021-11-07 08:14:05,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:14:05,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:05,698 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:14:05,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:14:05,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-07 08:14:05,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:14:05,751 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 08:14:05,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 08:14:05,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 08:14:05,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:14:05,751 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-07 08:14:05,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:14:05,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:14:06,182 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:14:06,182 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-11-07 08:14:06,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:14:06 BoogieIcfgContainer [2021-11-07 08:14:06,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:14:06,203 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:14:06,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:14:06,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:14:06,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:14:04" (1/3) ... [2021-11-07 08:14:06,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5646b16a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:14:06, skipping insertion in model container [2021-11-07 08:14:06,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:05" (2/3) ... [2021-11-07 08:14:06,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5646b16a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:14:06, skipping insertion in model container [2021-11-07 08:14:06,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:14:06" (3/3) ... [2021-11-07 08:14:06,211 INFO L111 eAbstractionObserver]: Analyzing ICFG n.c24.i [2021-11-07 08:14:06,220 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:14:06,220 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:14:06,287 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:14:06,294 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 [2021-11-07 08:14:06,295 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:14:06,314 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 32 states have (on average 1.625) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:06,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 08:14:06,320 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:06,321 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:06,322 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:06,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:06,330 INFO L85 PathProgramCache]: Analyzing trace with hash 214843119, now seen corresponding path program 1 times [2021-11-07 08:14:06,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:06,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113238522] [2021-11-07 08:14:06,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:06,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:06,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:06,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:06,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113238522] [2021-11-07 08:14:06,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113238522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:06,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:06,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:14:06,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093152263] [2021-11-07 08:14:06,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:14:06,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:06,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:14:06,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:14:06,585 INFO L87 Difference]: Start difference. First operand has 34 states, 32 states have (on average 1.625) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:06,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:06,706 INFO L93 Difference]: Finished difference Result 90 states and 141 transitions. [2021-11-07 08:14:06,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:14:06,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-07 08:14:06,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:06,722 INFO L225 Difference]: With dead ends: 90 [2021-11-07 08:14:06,723 INFO L226 Difference]: Without dead ends: 53 [2021-11-07 08:14:06,728 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 [2021-11-07 08:14:06,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-07 08:14:06,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2021-11-07 08:14:06,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 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) [2021-11-07 08:14:06,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-11-07 08:14:06,773 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 8 [2021-11-07 08:14:06,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:06,774 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-11-07 08:14:06,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:06,775 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-11-07 08:14:06,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 08:14:06,776 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:06,776 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:06,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:14:06,777 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:06,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:06,779 INFO L85 PathProgramCache]: Analyzing trace with hash 979779318, now seen corresponding path program 1 times [2021-11-07 08:14:06,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:06,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026631570] [2021-11-07 08:14:06,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:06,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:06,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:14:06,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:06,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026631570] [2021-11-07 08:14:06,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026631570] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:06,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094808008] [2021-11-07 08:14:06,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:06,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:06,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:06,888 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:06,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:14:06,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:06,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:14:06,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:07,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:14:07,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094808008] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:07,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:07,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-07 08:14:07,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515585644] [2021-11-07 08:14:07,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:14:07,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:07,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:14:07,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:14:07,083 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-11-07 08:14:07,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:07,182 INFO L93 Difference]: Finished difference Result 103 states and 142 transitions. [2021-11-07 08:14:07,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:14:07,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) Word has length 15 [2021-11-07 08:14:07,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:07,201 INFO L225 Difference]: With dead ends: 103 [2021-11-07 08:14:07,201 INFO L226 Difference]: Without dead ends: 76 [2021-11-07 08:14:07,202 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:14:07,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-07 08:14:07,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 55. [2021-11-07 08:14:07,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 54 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:07,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 74 transitions. [2021-11-07 08:14:07,246 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 74 transitions. Word has length 15 [2021-11-07 08:14:07,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:07,246 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 74 transitions. [2021-11-07 08:14:07,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-11-07 08:14:07,247 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 74 transitions. [2021-11-07 08:14:07,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 08:14:07,248 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:07,249 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:07,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:07,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-07 08:14:07,450 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:07,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:07,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1772486034, now seen corresponding path program 2 times [2021-11-07 08:14:07,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:07,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448611952] [2021-11-07 08:14:07,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:07,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:07,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:07,569 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 08:14:07,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:07,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448611952] [2021-11-07 08:14:07,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448611952] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:07,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:07,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:14:07,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036948375] [2021-11-07 08:14:07,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:14:07,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:07,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:14:07,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:14:07,574 INFO L87 Difference]: Start difference. First operand 55 states and 74 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-11-07 08:14:07,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:07,612 INFO L93 Difference]: Finished difference Result 99 states and 136 transitions. [2021-11-07 08:14:07,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:14:07,613 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) Word has length 22 [2021-11-07 08:14:07,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:07,615 INFO L225 Difference]: With dead ends: 99 [2021-11-07 08:14:07,615 INFO L226 Difference]: Without dead ends: 95 [2021-11-07 08:14:07,616 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:14:07,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-07 08:14:07,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 56. [2021-11-07 08:14:07,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 55 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:07,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2021-11-07 08:14:07,628 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 22 [2021-11-07 08:14:07,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:07,629 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2021-11-07 08:14:07,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-11-07 08:14:07,630 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2021-11-07 08:14:07,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 08:14:07,631 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:07,632 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:07,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:14:07,632 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:07,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:07,633 INFO L85 PathProgramCache]: Analyzing trace with hash -60131068, now seen corresponding path program 1 times [2021-11-07 08:14:07,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:07,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084648124] [2021-11-07 08:14:07,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:07,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:07,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 08:14:07,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:07,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084648124] [2021-11-07 08:14:07,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084648124] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:07,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578109634] [2021-11-07 08:14:07,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:07,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:07,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:07,772 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:07,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:14:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:07,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:14:07,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:07,980 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 08:14:07,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578109634] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:07,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:07,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-07 08:14:07,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107011984] [2021-11-07 08:14:07,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:14:07,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:07,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:14:07,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:14:07,984 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 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) [2021-11-07 08:14:08,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:08,057 INFO L93 Difference]: Finished difference Result 156 states and 217 transitions. [2021-11-07 08:14:08,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:14:08,057 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 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 27 [2021-11-07 08:14:08,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:08,059 INFO L225 Difference]: With dead ends: 156 [2021-11-07 08:14:08,059 INFO L226 Difference]: Without dead ends: 107 [2021-11-07 08:14:08,060 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:14:08,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-07 08:14:08,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 79. [2021-11-07 08:14:08,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.3846153846153846) internal successors, (108), 78 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:08,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 108 transitions. [2021-11-07 08:14:08,072 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 108 transitions. Word has length 27 [2021-11-07 08:14:08,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:08,073 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 108 transitions. [2021-11-07 08:14:08,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 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) [2021-11-07 08:14:08,073 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 108 transitions. [2021-11-07 08:14:08,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 08:14:08,075 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:08,075 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:08,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:08,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:08,291 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:08,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:08,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1460150848, now seen corresponding path program 2 times [2021-11-07 08:14:08,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:08,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763331264] [2021-11-07 08:14:08,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:08,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:08,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:08,390 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 08:14:08,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:08,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763331264] [2021-11-07 08:14:08,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763331264] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:08,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192600121] [2021-11-07 08:14:08,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:14:08,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:08,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:08,393 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:08,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:14:08,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:14:08,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:08,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 08:14:08,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 08:14:08,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192600121] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:08,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:08,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-07 08:14:08,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022492903] [2021-11-07 08:14:08,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:14:08,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:08,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:14:08,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:14:08,636 INFO L87 Difference]: Start difference. First operand 79 states and 108 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:08,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:08,742 INFO L93 Difference]: Finished difference Result 200 states and 279 transitions. [2021-11-07 08:14:08,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:14:08,743 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 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 34 [2021-11-07 08:14:08,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:08,754 INFO L225 Difference]: With dead ends: 200 [2021-11-07 08:14:08,754 INFO L226 Difference]: Without dead ends: 130 [2021-11-07 08:14:08,759 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:14:08,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-07 08:14:08,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 102. [2021-11-07 08:14:08,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.386138613861386) internal successors, (140), 101 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:08,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 140 transitions. [2021-11-07 08:14:08,803 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 140 transitions. Word has length 34 [2021-11-07 08:14:08,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:08,804 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 140 transitions. [2021-11-07 08:14:08,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:08,805 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 140 transitions. [2021-11-07 08:14:08,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 08:14:08,808 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:08,808 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:08,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:09,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:09,031 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:09,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:09,032 INFO L85 PathProgramCache]: Analyzing trace with hash -569704896, now seen corresponding path program 3 times [2021-11-07 08:14:09,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:09,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401365559] [2021-11-07 08:14:09,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:09,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-07 08:14:09,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:09,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401365559] [2021-11-07 08:14:09,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401365559] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:09,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911497791] [2021-11-07 08:14:09,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:14:09,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:09,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:09,130 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:09,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:14:09,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 08:14:09,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:09,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 08:14:09,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:09,419 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-07 08:14:09,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911497791] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:09,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:09,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-11-07 08:14:09,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789044943] [2021-11-07 08:14:09,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:14:09,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:09,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:14:09,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:14:09,422 INFO L87 Difference]: Start difference. First operand 102 states and 140 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 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) [2021-11-07 08:14:09,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:09,967 INFO L93 Difference]: Finished difference Result 479 states and 683 transitions. [2021-11-07 08:14:09,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 08:14:09,967 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 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) Word has length 41 [2021-11-07 08:14:09,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:09,970 INFO L225 Difference]: With dead ends: 479 [2021-11-07 08:14:09,970 INFO L226 Difference]: Without dead ends: 386 [2021-11-07 08:14:09,972 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2021-11-07 08:14:09,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-07 08:14:09,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 142. [2021-11-07 08:14:09,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.4042553191489362) internal successors, (198), 141 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:09,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 198 transitions. [2021-11-07 08:14:09,989 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 198 transitions. Word has length 41 [2021-11-07 08:14:09,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:09,989 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 198 transitions. [2021-11-07 08:14:09,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 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) [2021-11-07 08:14:09,990 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 198 transitions. [2021-11-07 08:14:09,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 08:14:09,992 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:09,992 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:10,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:10,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-07 08:14:10,207 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:10,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:10,207 INFO L85 PathProgramCache]: Analyzing trace with hash 699814446, now seen corresponding path program 4 times [2021-11-07 08:14:10,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:10,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276165168] [2021-11-07 08:14:10,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:10,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:10,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-07 08:14:10,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:10,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276165168] [2021-11-07 08:14:10,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276165168] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:10,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132144619] [2021-11-07 08:14:10,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:14:10,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:10,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:10,318 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:10,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:14:10,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:14:10,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:10,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 08:14:10,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:10,565 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-07 08:14:10,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132144619] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:10,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:10,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-07 08:14:10,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254351415] [2021-11-07 08:14:10,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:14:10,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:10,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:14:10,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:14:10,575 INFO L87 Difference]: Start difference. First operand 142 states and 198 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-11-07 08:14:10,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:10,701 INFO L93 Difference]: Finished difference Result 356 states and 507 transitions. [2021-11-07 08:14:10,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:14:10,702 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 53 [2021-11-07 08:14:10,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:10,704 INFO L225 Difference]: With dead ends: 356 [2021-11-07 08:14:10,704 INFO L226 Difference]: Without dead ends: 227 [2021-11-07 08:14:10,705 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:14:10,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-07 08:14:10,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 165. [2021-11-07 08:14:10,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.4024390243902438) internal successors, (230), 164 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) [2021-11-07 08:14:10,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 230 transitions. [2021-11-07 08:14:10,723 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 230 transitions. Word has length 53 [2021-11-07 08:14:10,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:10,723 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 230 transitions. [2021-11-07 08:14:10,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-11-07 08:14:10,724 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 230 transitions. [2021-11-07 08:14:10,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 08:14:10,727 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:10,727 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:10,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-07 08:14:10,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-07 08:14:10,955 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:10,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:10,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1002785610, now seen corresponding path program 5 times [2021-11-07 08:14:10,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:10,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220474697] [2021-11-07 08:14:10,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:10,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:10,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-07 08:14:11,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:11,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220474697] [2021-11-07 08:14:11,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220474697] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:11,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548486115] [2021-11-07 08:14:11,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:14:11,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:11,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:11,101 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:11,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 08:14:11,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-07 08:14:11,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:11,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:14:11,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-07 08:14:11,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548486115] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:11,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:11,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-07 08:14:11,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813950420] [2021-11-07 08:14:11,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:14:11,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:11,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:14:11,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:14:11,472 INFO L87 Difference]: Start difference. First operand 165 states and 230 transitions. Second operand has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:11,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:11,589 INFO L93 Difference]: Finished difference Result 400 states and 569 transitions. [2021-11-07 08:14:11,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:14:11,589 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 08:14:11,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:11,591 INFO L225 Difference]: With dead ends: 400 [2021-11-07 08:14:11,591 INFO L226 Difference]: Without dead ends: 250 [2021-11-07 08:14:11,592 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:14:11,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-11-07 08:14:11,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 188. [2021-11-07 08:14:11,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.4010695187165776) internal successors, (262), 187 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) [2021-11-07 08:14:11,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 262 transitions. [2021-11-07 08:14:11,619 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 262 transitions. Word has length 60 [2021-11-07 08:14:11,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:11,619 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 262 transitions. [2021-11-07 08:14:11,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:11,620 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 262 transitions. [2021-11-07 08:14:11,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 08:14:11,625 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:11,625 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:11,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:11,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:11,839 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:11,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:11,839 INFO L85 PathProgramCache]: Analyzing trace with hash 2061652970, now seen corresponding path program 6 times [2021-11-07 08:14:11,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:11,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189877183] [2021-11-07 08:14:11,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:11,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:11,937 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-11-07 08:14:11,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:11,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189877183] [2021-11-07 08:14:11,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189877183] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:11,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650126804] [2021-11-07 08:14:11,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:14:11,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:11,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:11,943 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:11,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 08:14:12,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-07 08:14:12,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:12,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:14:12,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 31 proven. 7 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-07 08:14:12,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650126804] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:12,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:12,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2021-11-07 08:14:12,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039405134] [2021-11-07 08:14:12,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 08:14:12,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:12,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 08:14:12,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:14:12,410 INFO L87 Difference]: Start difference. First operand 188 states and 262 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 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) [2021-11-07 08:14:13,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:13,506 INFO L93 Difference]: Finished difference Result 929 states and 1331 transitions. [2021-11-07 08:14:13,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-07 08:14:13,506 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 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) Word has length 67 [2021-11-07 08:14:13,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:13,522 INFO L225 Difference]: With dead ends: 929 [2021-11-07 08:14:13,523 INFO L226 Difference]: Without dead ends: 756 [2021-11-07 08:14:13,526 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=725, Invalid=1725, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 08:14:13,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-11-07 08:14:13,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 228. [2021-11-07 08:14:13,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.4096916299559472) internal successors, (320), 227 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:13,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 320 transitions. [2021-11-07 08:14:13,562 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 320 transitions. Word has length 67 [2021-11-07 08:14:13,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:13,562 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 320 transitions. [2021-11-07 08:14:13,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 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) [2021-11-07 08:14:13,563 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 320 transitions. [2021-11-07 08:14:13,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 08:14:13,565 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:13,565 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:13,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:13,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:13,771 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:13,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:13,772 INFO L85 PathProgramCache]: Analyzing trace with hash 405362168, now seen corresponding path program 7 times [2021-11-07 08:14:13,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:13,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417452024] [2021-11-07 08:14:13,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:13,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:13,916 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-07 08:14:13,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:13,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417452024] [2021-11-07 08:14:13,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417452024] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:13,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734660915] [2021-11-07 08:14:13,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:14:13,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:13,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:13,918 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:13,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 08:14:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:14,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:14:14,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:14,322 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-07 08:14:14,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734660915] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:14,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:14,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-07 08:14:14,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386057061] [2021-11-07 08:14:14,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:14:14,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:14,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:14:14,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:14:14,325 INFO L87 Difference]: Start difference. First operand 228 states and 320 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-11-07 08:14:14,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:14,473 INFO L93 Difference]: Finished difference Result 556 states and 797 transitions. [2021-11-07 08:14:14,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 08:14:14,474 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 79 [2021-11-07 08:14:14,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:14,476 INFO L225 Difference]: With dead ends: 556 [2021-11-07 08:14:14,477 INFO L226 Difference]: Without dead ends: 347 [2021-11-07 08:14:14,478 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:14:14,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-11-07 08:14:14,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 251. [2021-11-07 08:14:14,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.408) internal successors, (352), 250 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:14,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 352 transitions. [2021-11-07 08:14:14,499 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 352 transitions. Word has length 79 [2021-11-07 08:14:14,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:14,499 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 352 transitions. [2021-11-07 08:14:14,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-11-07 08:14:14,500 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 352 transitions. [2021-11-07 08:14:14,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 08:14:14,501 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:14,501 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:14,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:14,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 08:14:14,727 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:14,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:14,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1160449228, now seen corresponding path program 8 times [2021-11-07 08:14:14,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:14,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576592834] [2021-11-07 08:14:14,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:14,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:14,854 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-07 08:14:14,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:14,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576592834] [2021-11-07 08:14:14,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576592834] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:14,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194620857] [2021-11-07 08:14:14,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:14:14,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:14,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:14,855 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:14,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 08:14:15,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:14:15,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:15,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 08:14:15,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-07 08:14:15,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194620857] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:15,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:15,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-07 08:14:15,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126036422] [2021-11-07 08:14:15,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 08:14:15,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:15,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 08:14:15,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:14:15,259 INFO L87 Difference]: Start difference. First operand 251 states and 352 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-11-07 08:14:15,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:15,441 INFO L93 Difference]: Finished difference Result 600 states and 859 transitions. [2021-11-07 08:14:15,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:14:15,442 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 86 [2021-11-07 08:14:15,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:15,445 INFO L225 Difference]: With dead ends: 600 [2021-11-07 08:14:15,445 INFO L226 Difference]: Without dead ends: 370 [2021-11-07 08:14:15,446 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:14:15,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-11-07 08:14:15,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 274. [2021-11-07 08:14:15,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 1.4065934065934067) internal successors, (384), 273 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:15,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 384 transitions. [2021-11-07 08:14:15,474 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 384 transitions. Word has length 86 [2021-11-07 08:14:15,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:15,476 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 384 transitions. [2021-11-07 08:14:15,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-11-07 08:14:15,476 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 384 transitions. [2021-11-07 08:14:15,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 08:14:15,484 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:15,484 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:15,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:15,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:15,699 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:15,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:15,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1195602996, now seen corresponding path program 9 times [2021-11-07 08:14:15,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:15,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982202028] [2021-11-07 08:14:15,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:15,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:15,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2021-11-07 08:14:15,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:15,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982202028] [2021-11-07 08:14:15,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982202028] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:15,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824850003] [2021-11-07 08:14:15,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:14:15,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:15,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:15,823 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:15,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 08:14:16,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 08:14:16,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:16,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 08:14:16,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 55 proven. 18 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-11-07 08:14:16,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824850003] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:16,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:16,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2021-11-07 08:14:16,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971412215] [2021-11-07 08:14:16,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 08:14:16,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:16,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 08:14:16,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:14:16,443 INFO L87 Difference]: Start difference. First operand 274 states and 384 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 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) [2021-11-07 08:14:18,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:18,539 INFO L93 Difference]: Finished difference Result 1499 states and 2153 transitions. [2021-11-07 08:14:18,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-07 08:14:18,540 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 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 93 [2021-11-07 08:14:18,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:18,551 INFO L225 Difference]: With dead ends: 1499 [2021-11-07 08:14:18,551 INFO L226 Difference]: Without dead ends: 1246 [2021-11-07 08:14:18,555 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1876 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1752, Invalid=4254, Unknown=0, NotChecked=0, Total=6006 [2021-11-07 08:14:18,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-11-07 08:14:18,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 314. [2021-11-07 08:14:18,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 1.4121405750798721) internal successors, (442), 313 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:18,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 442 transitions. [2021-11-07 08:14:18,595 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 442 transitions. Word has length 93 [2021-11-07 08:14:18,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:18,596 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 442 transitions. [2021-11-07 08:14:18,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 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) [2021-11-07 08:14:18,596 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 442 transitions. [2021-11-07 08:14:18,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 08:14:18,598 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:18,598 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:18,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:18,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 08:14:18,807 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:18,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:18,807 INFO L85 PathProgramCache]: Analyzing trace with hash -976504798, now seen corresponding path program 10 times [2021-11-07 08:14:18,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:18,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303389201] [2021-11-07 08:14:18,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:18,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-11-07 08:14:18,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:18,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303389201] [2021-11-07 08:14:18,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303389201] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:18,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382456555] [2021-11-07 08:14:18,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:14:18,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:18,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:18,973 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:18,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 08:14:19,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:14:19,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:19,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 08:14:19,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:19,504 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-11-07 08:14:19,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382456555] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:19,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:19,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-07 08:14:19,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212996869] [2021-11-07 08:14:19,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 08:14:19,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:19,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 08:14:19,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:14:19,507 INFO L87 Difference]: Start difference. First operand 314 states and 442 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-11-07 08:14:19,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:19,720 INFO L93 Difference]: Finished difference Result 756 states and 1087 transitions. [2021-11-07 08:14:19,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 08:14:19,721 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 105 [2021-11-07 08:14:19,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:19,724 INFO L225 Difference]: With dead ends: 756 [2021-11-07 08:14:19,725 INFO L226 Difference]: Without dead ends: 467 [2021-11-07 08:14:19,726 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:14:19,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-11-07 08:14:19,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 337. [2021-11-07 08:14:19,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 1.4107142857142858) internal successors, (474), 336 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:19,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 474 transitions. [2021-11-07 08:14:19,766 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 474 transitions. Word has length 105 [2021-11-07 08:14:19,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:19,767 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 474 transitions. [2021-11-07 08:14:19,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-11-07 08:14:19,767 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 474 transitions. [2021-11-07 08:14:19,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 08:14:19,769 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:19,769 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:19,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:19,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-07 08:14:19,983 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:19,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:19,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1388274110, now seen corresponding path program 11 times [2021-11-07 08:14:19,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:19,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526635366] [2021-11-07 08:14:19,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:19,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-11-07 08:14:20,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:20,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526635366] [2021-11-07 08:14:20,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526635366] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:20,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916312274] [2021-11-07 08:14:20,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:14:20,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:20,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:20,152 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:20,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 08:14:20,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-11-07 08:14:20,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:20,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 08:14:20,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-11-07 08:14:21,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916312274] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:21,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:21,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-07 08:14:21,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53982801] [2021-11-07 08:14:21,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 08:14:21,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:21,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 08:14:21,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:14:21,026 INFO L87 Difference]: Start difference. First operand 337 states and 474 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2021-11-07 08:14:21,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:21,245 INFO L93 Difference]: Finished difference Result 800 states and 1149 transitions. [2021-11-07 08:14:21,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 08:14:21,245 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) Word has length 112 [2021-11-07 08:14:21,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:21,249 INFO L225 Difference]: With dead ends: 800 [2021-11-07 08:14:21,249 INFO L226 Difference]: Without dead ends: 490 [2021-11-07 08:14:21,250 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:14:21,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-11-07 08:14:21,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 360. [2021-11-07 08:14:21,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.4094707520891365) internal successors, (506), 359 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:21,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 506 transitions. [2021-11-07 08:14:21,280 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 506 transitions. Word has length 112 [2021-11-07 08:14:21,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:21,280 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 506 transitions. [2021-11-07 08:14:21,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2021-11-07 08:14:21,280 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 506 transitions. [2021-11-07 08:14:21,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-07 08:14:21,283 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:21,283 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:21,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:21,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 08:14:21,507 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:21,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:21,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1913557726, now seen corresponding path program 12 times [2021-11-07 08:14:21,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:21,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089055677] [2021-11-07 08:14:21,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:21,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:21,740 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2021-11-07 08:14:21,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:21,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089055677] [2021-11-07 08:14:21,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089055677] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:21,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057661679] [2021-11-07 08:14:21,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:14:21,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:21,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:21,747 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:21,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 08:14:22,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-07 08:14:22,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:22,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:14:22,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:22,873 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 85 proven. 34 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-11-07 08:14:22,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057661679] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:22,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:22,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 23 [2021-11-07 08:14:22,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001024657] [2021-11-07 08:14:22,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 08:14:22,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:22,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 08:14:22,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2021-11-07 08:14:22,876 INFO L87 Difference]: Start difference. First operand 360 states and 506 transitions. Second operand has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:26,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:26,773 INFO L93 Difference]: Finished difference Result 2189 states and 3149 transitions. [2021-11-07 08:14:26,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-11-07 08:14:26,773 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-07 08:14:26,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:26,785 INFO L225 Difference]: With dead ends: 2189 [2021-11-07 08:14:26,786 INFO L226 Difference]: Without dead ends: 1856 [2021-11-07 08:14:26,791 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4244 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3578, Invalid=8854, Unknown=0, NotChecked=0, Total=12432 [2021-11-07 08:14:26,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2021-11-07 08:14:26,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 400. [2021-11-07 08:14:26,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.413533834586466) internal successors, (564), 399 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:26,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 564 transitions. [2021-11-07 08:14:26,841 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 564 transitions. Word has length 119 [2021-11-07 08:14:26,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:26,841 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 564 transitions. [2021-11-07 08:14:26,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:26,842 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 564 transitions. [2021-11-07 08:14:26,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-07 08:14:26,844 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:26,844 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:26,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:27,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 08:14:27,071 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:27,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:27,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1990173460, now seen corresponding path program 13 times [2021-11-07 08:14:27,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:27,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396031704] [2021-11-07 08:14:27,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:27,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:27,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:27,264 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2021-11-07 08:14:27,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:27,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396031704] [2021-11-07 08:14:27,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396031704] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:27,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189727415] [2021-11-07 08:14:27,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:14:27,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:27,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:27,266 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:27,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 08:14:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:27,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 08:14:27,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2021-11-07 08:14:27,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189727415] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:27,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:27,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-07 08:14:27,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416113869] [2021-11-07 08:14:27,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 08:14:27,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:27,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 08:14:27,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:14:27,916 INFO L87 Difference]: Start difference. First operand 400 states and 564 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 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) [2021-11-07 08:14:28,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:28,206 INFO L93 Difference]: Finished difference Result 956 states and 1377 transitions. [2021-11-07 08:14:28,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 08:14:28,207 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 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 131 [2021-11-07 08:14:28,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:28,211 INFO L225 Difference]: With dead ends: 956 [2021-11-07 08:14:28,211 INFO L226 Difference]: Without dead ends: 587 [2021-11-07 08:14:28,212 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:14:28,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-11-07 08:14:28,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 423. [2021-11-07 08:14:28,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 1.4123222748815165) internal successors, (596), 422 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:28,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 596 transitions. [2021-11-07 08:14:28,254 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 596 transitions. Word has length 131 [2021-11-07 08:14:28,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:28,254 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 596 transitions. [2021-11-07 08:14:28,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 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) [2021-11-07 08:14:28,255 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 596 transitions. [2021-11-07 08:14:28,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-07 08:14:28,257 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:28,257 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:28,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:28,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 08:14:28,479 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:28,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:28,479 INFO L85 PathProgramCache]: Analyzing trace with hash 948800856, now seen corresponding path program 14 times [2021-11-07 08:14:28,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:28,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719939882] [2021-11-07 08:14:28,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:28,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:28,694 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 665 trivial. 0 not checked. [2021-11-07 08:14:28,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:28,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719939882] [2021-11-07 08:14:28,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719939882] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:28,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793221625] [2021-11-07 08:14:28,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:14:28,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:28,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:28,696 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:28,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 08:14:29,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:14:29,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:29,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 08:14:29,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:29,521 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 665 trivial. 0 not checked. [2021-11-07 08:14:29,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793221625] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:29,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:29,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-07 08:14:29,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085436104] [2021-11-07 08:14:29,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 08:14:29,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:29,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 08:14:29,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:14:29,525 INFO L87 Difference]: Start difference. First operand 423 states and 596 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 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) [2021-11-07 08:14:29,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:29,832 INFO L93 Difference]: Finished difference Result 1000 states and 1439 transitions. [2021-11-07 08:14:29,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 08:14:29,832 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 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 138 [2021-11-07 08:14:29,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:29,837 INFO L225 Difference]: With dead ends: 1000 [2021-11-07 08:14:29,837 INFO L226 Difference]: Without dead ends: 610 [2021-11-07 08:14:29,839 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:14:29,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-11-07 08:14:29,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 446. [2021-11-07 08:14:29,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.4112359550561797) internal successors, (628), 445 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:29,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 628 transitions. [2021-11-07 08:14:29,913 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 628 transitions. Word has length 138 [2021-11-07 08:14:29,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:29,914 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 628 transitions. [2021-11-07 08:14:29,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 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) [2021-11-07 08:14:29,914 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 628 transitions. [2021-11-07 08:14:29,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-07 08:14:29,917 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:29,917 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:29,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:30,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 08:14:30,134 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:30,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:30,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1960743976, now seen corresponding path program 15 times [2021-11-07 08:14:30,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:30,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419970419] [2021-11-07 08:14:30,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:30,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:30,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 746 trivial. 0 not checked. [2021-11-07 08:14:30,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:30,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419970419] [2021-11-07 08:14:30,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419970419] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:30,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983785199] [2021-11-07 08:14:30,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:14:30,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:30,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:30,381 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:30,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 08:14:30,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-07 08:14:30,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:30,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 08:14:30,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 121 proven. 55 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2021-11-07 08:14:31,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983785199] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:31,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:31,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 27 [2021-11-07 08:14:31,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427463627] [2021-11-07 08:14:31,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 08:14:31,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:31,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 08:14:31,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-11-07 08:14:31,341 INFO L87 Difference]: Start difference. First operand 446 states and 628 transitions. Second operand has 27 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 27 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) [2021-11-07 08:14:36,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:36,389 INFO L93 Difference]: Finished difference Result 2999 states and 4319 transitions. [2021-11-07 08:14:36,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-11-07 08:14:36,390 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 27 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 145 [2021-11-07 08:14:36,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:36,405 INFO L225 Difference]: With dead ends: 2999 [2021-11-07 08:14:36,405 INFO L226 Difference]: Without dead ends: 2586 [2021-11-07 08:14:36,414 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8327 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=6527, Invalid=16425, Unknown=0, NotChecked=0, Total=22952 [2021-11-07 08:14:36,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2021-11-07 08:14:36,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 486. [2021-11-07 08:14:36,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 1.4144329896907217) internal successors, (686), 485 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:36,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 686 transitions. [2021-11-07 08:14:36,481 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 686 transitions. Word has length 145 [2021-11-07 08:14:36,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:36,482 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 686 transitions. [2021-11-07 08:14:36,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 27 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) [2021-11-07 08:14:36,482 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 686 transitions. [2021-11-07 08:14:36,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-07 08:14:36,484 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:36,485 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:36,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-07 08:14:36,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 08:14:36,699 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:36,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:36,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1285146646, now seen corresponding path program 16 times [2021-11-07 08:14:36,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:36,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605997507] [2021-11-07 08:14:36,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:36,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:36,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:36,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked. [2021-11-07 08:14:36,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:36,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605997507] [2021-11-07 08:14:36,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605997507] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:36,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760681792] [2021-11-07 08:14:36,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:14:36,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:36,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:36,961 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:36,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 08:14:37,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:14:37,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:37,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 08:14:37,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 793 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-11-07 08:14:38,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760681792] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:38,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:38,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-07 08:14:38,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090294161] [2021-11-07 08:14:38,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 08:14:38,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:38,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 08:14:38,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-07 08:14:38,009 INFO L87 Difference]: Start difference. First operand 486 states and 686 transitions. Second operand has 21 states, 21 states have (on average 7.0476190476190474) internal successors, (148), 21 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:38,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:38,266 INFO L93 Difference]: Finished difference Result 1156 states and 1667 transitions. [2021-11-07 08:14:38,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 08:14:38,267 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.0476190476190474) internal successors, (148), 21 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-11-07 08:14:38,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:38,270 INFO L225 Difference]: With dead ends: 1156 [2021-11-07 08:14:38,270 INFO L226 Difference]: Without dead ends: 707 [2021-11-07 08:14:38,272 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-07 08:14:38,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-11-07 08:14:38,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 509. [2021-11-07 08:14:38,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 1.4133858267716535) internal successors, (718), 508 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:38,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 718 transitions. [2021-11-07 08:14:38,362 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 718 transitions. Word has length 157 [2021-11-07 08:14:38,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:38,362 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 718 transitions. [2021-11-07 08:14:38,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.0476190476190474) internal successors, (148), 21 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:38,363 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 718 transitions. [2021-11-07 08:14:38,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-07 08:14:38,366 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:38,366 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:38,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:38,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:38,579 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:38,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:38,579 INFO L85 PathProgramCache]: Analyzing trace with hash 2047057358, now seen corresponding path program 17 times [2021-11-07 08:14:38,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:38,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227710477] [2021-11-07 08:14:38,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:38,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:38,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:38,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 966 trivial. 0 not checked. [2021-11-07 08:14:38,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:38,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227710477] [2021-11-07 08:14:38,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227710477] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:38,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735200451] [2021-11-07 08:14:38,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:14:38,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:38,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:38,828 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:38,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 08:14:40,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-11-07 08:14:40,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:40,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 08:14:40,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 966 trivial. 0 not checked. [2021-11-07 08:14:40,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735200451] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:40,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:40,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-07 08:14:40,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120546977] [2021-11-07 08:14:40,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 08:14:40,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:40,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 08:14:40,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:14:40,550 INFO L87 Difference]: Start difference. First operand 509 states and 718 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 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) [2021-11-07 08:14:40,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:40,824 INFO L93 Difference]: Finished difference Result 1200 states and 1729 transitions. [2021-11-07 08:14:40,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 08:14:40,824 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 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 164 [2021-11-07 08:14:40,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:40,828 INFO L225 Difference]: With dead ends: 1200 [2021-11-07 08:14:40,828 INFO L226 Difference]: Without dead ends: 730 [2021-11-07 08:14:40,829 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:14:40,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-11-07 08:14:40,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 532. [2021-11-07 08:14:40,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 1.4124293785310735) internal successors, (750), 531 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:40,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 750 transitions. [2021-11-07 08:14:40,890 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 750 transitions. Word has length 164 [2021-11-07 08:14:40,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:40,891 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 750 transitions. [2021-11-07 08:14:40,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 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) [2021-11-07 08:14:40,891 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 750 transitions. [2021-11-07 08:14:40,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-07 08:14:40,894 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:40,894 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:40,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:41,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:41,119 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:41,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:41,119 INFO L85 PathProgramCache]: Analyzing trace with hash -834798638, now seen corresponding path program 18 times [2021-11-07 08:14:41,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:41,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752856778] [2021-11-07 08:14:41,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:41,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:41,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1063 trivial. 0 not checked. [2021-11-07 08:14:41,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:41,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752856778] [2021-11-07 08:14:41,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752856778] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:41,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831711478] [2021-11-07 08:14:41,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:14:41,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:41,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:41,425 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:41,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 08:14:42,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-11-07 08:14:42,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:42,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 08:14:42,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:42,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 163 proven. 81 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2021-11-07 08:14:42,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831711478] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:42,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:42,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11] total 31 [2021-11-07 08:14:42,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989835265] [2021-11-07 08:14:42,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 08:14:42,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:42,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 08:14:42,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=660, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:14:42,987 INFO L87 Difference]: Start difference. First operand 532 states and 750 transitions. Second operand has 31 states, 31 states have (on average 3.2903225806451615) internal successors, (102), 31 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) [2021-11-07 08:14:51,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:51,132 INFO L93 Difference]: Finished difference Result 3929 states and 5663 transitions. [2021-11-07 08:14:51,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2021-11-07 08:14:51,132 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.2903225806451615) internal successors, (102), 31 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) Word has length 171 [2021-11-07 08:14:51,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:51,147 INFO L225 Difference]: With dead ends: 3929 [2021-11-07 08:14:51,147 INFO L226 Difference]: Without dead ends: 3436 [2021-11-07 08:14:51,153 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14792 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=10977, Invalid=28029, Unknown=0, NotChecked=0, Total=39006 [2021-11-07 08:14:51,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2021-11-07 08:14:51,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 572. [2021-11-07 08:14:51,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 1.415061295971979) internal successors, (808), 571 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:51,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 808 transitions. [2021-11-07 08:14:51,250 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 808 transitions. Word has length 171 [2021-11-07 08:14:51,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:51,250 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 808 transitions. [2021-11-07 08:14:51,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.2903225806451615) internal successors, (102), 31 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) [2021-11-07 08:14:51,251 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 808 transitions. [2021-11-07 08:14:51,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-07 08:14:51,253 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:51,253 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:51,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:51,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-07 08:14:51,479 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:51,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:51,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1264415264, now seen corresponding path program 19 times [2021-11-07 08:14:51,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:51,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146833661] [2021-11-07 08:14:51,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:51,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:51,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1615 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1215 trivial. 0 not checked. [2021-11-07 08:14:51,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:51,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146833661] [2021-11-07 08:14:51,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146833661] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:51,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073781644] [2021-11-07 08:14:51,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:14:51,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:51,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:51,812 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:51,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 08:14:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:52,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 08:14:52,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:52,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1615 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1215 trivial. 0 not checked. [2021-11-07 08:14:52,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073781644] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:52,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:52,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-07 08:14:52,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660213706] [2021-11-07 08:14:52,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 08:14:52,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:52,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 08:14:52,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-07 08:14:52,958 INFO L87 Difference]: Start difference. First operand 572 states and 808 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2021-11-07 08:14:53,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:53,440 INFO L93 Difference]: Finished difference Result 1356 states and 1957 transitions. [2021-11-07 08:14:53,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 08:14:53,440 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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 183 [2021-11-07 08:14:53,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:53,445 INFO L225 Difference]: With dead ends: 1356 [2021-11-07 08:14:53,445 INFO L226 Difference]: Without dead ends: 827 [2021-11-07 08:14:53,446 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-07 08:14:53,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-11-07 08:14:53,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 595. [2021-11-07 08:14:53,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 1.4141414141414141) internal successors, (840), 594 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:53,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 840 transitions. [2021-11-07 08:14:53,539 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 840 transitions. Word has length 183 [2021-11-07 08:14:53,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:53,539 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 840 transitions. [2021-11-07 08:14:53,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2021-11-07 08:14:53,539 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 840 transitions. [2021-11-07 08:14:53,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-07 08:14:53,542 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:53,542 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:53,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:53,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-07 08:14:53,767 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:53,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:53,767 INFO L85 PathProgramCache]: Analyzing trace with hash 939303908, now seen corresponding path program 20 times [2021-11-07 08:14:53,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:53,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971853337] [2021-11-07 08:14:53,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:53,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:54,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1323 trivial. 0 not checked. [2021-11-07 08:14:54,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:54,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971853337] [2021-11-07 08:14:54,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971853337] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:54,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538242211] [2021-11-07 08:14:54,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:14:54,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:54,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:54,104 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:54,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 08:14:54,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:14:54,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:54,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 08:14:54,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:55,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1323 trivial. 0 not checked. [2021-11-07 08:14:55,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538242211] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:55,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:55,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-07 08:14:55,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746657225] [2021-11-07 08:14:55,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 08:14:55,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:55,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 08:14:55,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-07 08:14:55,247 INFO L87 Difference]: Start difference. First operand 595 states and 840 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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) [2021-11-07 08:14:55,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:55,611 INFO L93 Difference]: Finished difference Result 1400 states and 2019 transitions. [2021-11-07 08:14:55,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 08:14:55,611 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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 190 [2021-11-07 08:14:55,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:55,615 INFO L225 Difference]: With dead ends: 1400 [2021-11-07 08:14:55,615 INFO L226 Difference]: Without dead ends: 850 [2021-11-07 08:14:55,616 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-07 08:14:55,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-11-07 08:14:55,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 618. [2021-11-07 08:14:55,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 1.413290113452188) internal successors, (872), 617 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:55,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 872 transitions. [2021-11-07 08:14:55,706 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 872 transitions. Word has length 190 [2021-11-07 08:14:55,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:55,707 INFO L470 AbstractCegarLoop]: Abstraction has 618 states and 872 transitions. [2021-11-07 08:14:55,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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) [2021-11-07 08:14:55,707 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 872 transitions. [2021-11-07 08:14:55,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-07 08:14:55,710 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:55,710 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:55,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:55,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-07 08:14:55,923 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:55,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:55,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1439736292, now seen corresponding path program 21 times [2021-11-07 08:14:55,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:55,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413400251] [2021-11-07 08:14:55,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:55,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:55,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1920 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1436 trivial. 0 not checked. [2021-11-07 08:14:56,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:56,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413400251] [2021-11-07 08:14:56,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413400251] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:56,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864984875] [2021-11-07 08:14:56,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:14:56,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:56,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:56,235 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:56,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 08:14:56,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-07 08:14:56,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:56,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 08:14:56,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:57,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1920 backedges. 211 proven. 112 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2021-11-07 08:14:57,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864984875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:57,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:57,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 12] total 35 [2021-11-07 08:14:57,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379880703] [2021-11-07 08:14:57,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-07 08:14:57,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:57,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-07 08:14:57,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=842, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 08:14:57,694 INFO L87 Difference]: Start difference. First operand 618 states and 872 transitions. Second operand has 35 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 35 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) [2021-11-07 08:15:09,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:09,873 INFO L93 Difference]: Finished difference Result 4979 states and 7181 transitions. [2021-11-07 08:15:09,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 241 states. [2021-11-07 08:15:09,874 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 35 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 197 [2021-11-07 08:15:09,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:09,893 INFO L225 Difference]: With dead ends: 4979 [2021-11-07 08:15:09,893 INFO L226 Difference]: Without dead ends: 4406 [2021-11-07 08:15:09,903 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24414 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=17360, Invalid=44890, Unknown=0, NotChecked=0, Total=62250 [2021-11-07 08:15:09,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4406 states. [2021-11-07 08:15:10,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4406 to 658. [2021-11-07 08:15:10,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 1.4155251141552512) internal successors, (930), 657 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:10,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 930 transitions. [2021-11-07 08:15:10,036 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 930 transitions. Word has length 197 [2021-11-07 08:15:10,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:10,037 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 930 transitions. [2021-11-07 08:15:10,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 35 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) [2021-11-07 08:15:10,037 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 930 transitions. [2021-11-07 08:15:10,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-07 08:15:10,040 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:10,040 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:10,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-07 08:15:10,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:15:10,255 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:10,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:10,255 INFO L85 PathProgramCache]: Analyzing trace with hash 775127562, now seen corresponding path program 22 times [2021-11-07 08:15:10,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:10,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358871894] [2021-11-07 08:15:10,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:10,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:10,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:10,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2141 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1612 trivial. 0 not checked. [2021-11-07 08:15:10,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:10,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358871894] [2021-11-07 08:15:10,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358871894] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:10,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382290726] [2021-11-07 08:15:10,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:15:10,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:15:10,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:15:10,592 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:15:10,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 08:15:11,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:15:11,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:15:11,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 08:15:11,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:15:11,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2141 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1612 trivial. 0 not checked. [2021-11-07 08:15:11,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382290726] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:11,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:15:11,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-11-07 08:15:11,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061477942] [2021-11-07 08:15:11,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 08:15:11,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:11,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 08:15:11,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-07 08:15:11,814 INFO L87 Difference]: Start difference. First operand 658 states and 930 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 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) [2021-11-07 08:15:12,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:12,292 INFO L93 Difference]: Finished difference Result 1556 states and 2247 transitions. [2021-11-07 08:15:12,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 08:15:12,293 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 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 209 [2021-11-07 08:15:12,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:12,297 INFO L225 Difference]: With dead ends: 1556 [2021-11-07 08:15:12,297 INFO L226 Difference]: Without dead ends: 947 [2021-11-07 08:15:12,298 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-07 08:15:12,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-11-07 08:15:12,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 681. [2021-11-07 08:15:12,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.4147058823529413) internal successors, (962), 680 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:12,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 962 transitions. [2021-11-07 08:15:12,419 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 962 transitions. Word has length 209 [2021-11-07 08:15:12,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:12,420 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 962 transitions. [2021-11-07 08:15:12,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 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) [2021-11-07 08:15:12,420 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 962 transitions. [2021-11-07 08:15:12,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-07 08:15:12,423 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:12,423 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:12,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-07 08:15:12,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:15:12,638 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:12,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:12,638 INFO L85 PathProgramCache]: Analyzing trace with hash 743486298, now seen corresponding path program 23 times [2021-11-07 08:15:12,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:12,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738267465] [2021-11-07 08:15:12,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:12,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1736 trivial. 0 not checked. [2021-11-07 08:15:13,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:13,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738267465] [2021-11-07 08:15:13,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738267465] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:13,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629901116] [2021-11-07 08:15:13,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:15:13,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:15:13,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:15:13,018 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:15:13,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-07 08:15:15,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-11-07 08:15:15,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:15:15,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 08:15:15,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:15:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1736 trivial. 0 not checked. [2021-11-07 08:15:16,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629901116] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:16,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:15:16,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-07 08:15:16,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537771039] [2021-11-07 08:15:16,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 08:15:16,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:16,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 08:15:16,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-07 08:15:16,040 INFO L87 Difference]: Start difference. First operand 681 states and 962 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 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) [2021-11-07 08:15:16,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:16,577 INFO L93 Difference]: Finished difference Result 1600 states and 2309 transitions. [2021-11-07 08:15:16,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 08:15:16,577 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 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 216 [2021-11-07 08:15:16,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:16,581 INFO L225 Difference]: With dead ends: 1600 [2021-11-07 08:15:16,582 INFO L226 Difference]: Without dead ends: 970 [2021-11-07 08:15:16,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-07 08:15:16,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2021-11-07 08:15:16,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 704. [2021-11-07 08:15:16,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 703 states have (on average 1.4139402560455192) internal successors, (994), 703 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:16,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 994 transitions. [2021-11-07 08:15:16,694 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 994 transitions. Word has length 216 [2021-11-07 08:15:16,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:16,694 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 994 transitions. [2021-11-07 08:15:16,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 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) [2021-11-07 08:15:16,695 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 994 transitions. [2021-11-07 08:15:16,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-07 08:15:16,697 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:16,698 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:16,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-07 08:15:16,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-07 08:15:16,911 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:16,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:16,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1849921222, now seen corresponding path program 24 times [2021-11-07 08:15:16,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:16,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823870713] [2021-11-07 08:15:16,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:16,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:17,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2490 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1865 trivial. 0 not checked. [2021-11-07 08:15:17,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:17,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823870713] [2021-11-07 08:15:17,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823870713] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:17,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008490081] [2021-11-07 08:15:17,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:15:17,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:15:17,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:15:17,351 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:15:17,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-07 08:15:19,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-07 08:15:19,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:15:19,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 08:15:19,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:15:20,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2490 backedges. 265 proven. 148 refuted. 0 times theorem prover too weak. 2077 trivial. 0 not checked. [2021-11-07 08:15:20,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008490081] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:20,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:15:20,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 13] total 39 [2021-11-07 08:15:20,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550041682] [2021-11-07 08:15:20,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-07 08:15:20,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:20,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-07 08:15:20,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=1046, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 08:15:20,076 INFO L87 Difference]: Start difference. First operand 704 states and 994 transitions. Second operand has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 39 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:38,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:38,540 INFO L93 Difference]: Finished difference Result 6149 states and 8873 transitions. [2021-11-07 08:15:38,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 298 states. [2021-11-07 08:15:38,541 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 39 states have internal predecessors, (124), 0 states have call successors, (0), 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 223 [2021-11-07 08:15:38,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:38,571 INFO L225 Difference]: With dead ends: 6149 [2021-11-07 08:15:38,571 INFO L226 Difference]: Without dead ends: 5496 [2021-11-07 08:15:38,580 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 762 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 306 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38076 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=26162, Invalid=68394, Unknown=0, NotChecked=0, Total=94556 [2021-11-07 08:15:38,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5496 states. [2021-11-07 08:15:38,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5496 to 744. [2021-11-07 08:15:38,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 1.4158815612382234) internal successors, (1052), 743 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:38,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1052 transitions. [2021-11-07 08:15:38,721 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1052 transitions. Word has length 223 [2021-11-07 08:15:38,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:38,721 INFO L470 AbstractCegarLoop]: Abstraction has 744 states and 1052 transitions. [2021-11-07 08:15:38,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 39 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:38,722 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1052 transitions. [2021-11-07 08:15:38,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-07 08:15:38,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:38,725 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:38,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-07 08:15:38,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-07 08:15:38,951 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:38,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:38,951 INFO L85 PathProgramCache]: Analyzing trace with hash 2130897108, now seen corresponding path program 25 times [2021-11-07 08:15:38,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:38,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502746930] [2021-11-07 08:15:38,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:38,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:39,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2741 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2065 trivial. 0 not checked. [2021-11-07 08:15:39,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:39,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502746930] [2021-11-07 08:15:39,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502746930] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:39,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441062315] [2021-11-07 08:15:39,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:15:39,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:15:39,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:15:39,398 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:15:39,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 08:15:40,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:40,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 866 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 08:15:40,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:15:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2741 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2065 trivial. 0 not checked. [2021-11-07 08:15:41,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441062315] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:41,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:15:41,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-07 08:15:41,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097318627] [2021-11-07 08:15:41,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-07 08:15:41,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:41,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-07 08:15:41,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-07 08:15:41,047 INFO L87 Difference]: Start difference. First operand 744 states and 1052 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 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) [2021-11-07 08:15:41,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:41,632 INFO L93 Difference]: Finished difference Result 1756 states and 2537 transitions. [2021-11-07 08:15:41,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 08:15:41,632 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 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 235 [2021-11-07 08:15:41,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:41,638 INFO L225 Difference]: With dead ends: 1756 [2021-11-07 08:15:41,638 INFO L226 Difference]: Without dead ends: 1067 [2021-11-07 08:15:41,639 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-07 08:15:41,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-11-07 08:15:41,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 767. [2021-11-07 08:15:41,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 1.4151436031331592) internal successors, (1084), 766 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:41,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1084 transitions. [2021-11-07 08:15:41,790 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1084 transitions. Word has length 235 [2021-11-07 08:15:41,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:41,790 INFO L470 AbstractCegarLoop]: Abstraction has 767 states and 1084 transitions. [2021-11-07 08:15:41,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 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) [2021-11-07 08:15:41,791 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1084 transitions. [2021-11-07 08:15:41,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-07 08:15:41,795 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:41,795 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:41,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-07 08:15:42,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-07 08:15:42,008 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:42,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:42,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1237667952, now seen corresponding path program 26 times [2021-11-07 08:15:42,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:42,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918828222] [2021-11-07 08:15:42,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:42,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:42,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:42,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2934 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 2205 trivial. 0 not checked. [2021-11-07 08:15:42,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:42,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918828222] [2021-11-07 08:15:42,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918828222] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:42,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215442175] [2021-11-07 08:15:42,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:15:42,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:15:42,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:15:42,527 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:15:42,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-07 08:15:43,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:15:43,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:15:43,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-07 08:15:43,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:15:44,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2934 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 2205 trivial. 0 not checked. [2021-11-07 08:15:44,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215442175] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:44,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:15:44,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-11-07 08:15:44,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614398457] [2021-11-07 08:15:44,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 08:15:44,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:44,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 08:15:44,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:15:44,267 INFO L87 Difference]: Start difference. First operand 767 states and 1084 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 31 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) [2021-11-07 08:15:44,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:44,893 INFO L93 Difference]: Finished difference Result 1800 states and 2599 transitions. [2021-11-07 08:15:44,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 08:15:44,894 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 31 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 242 [2021-11-07 08:15:44,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:44,898 INFO L225 Difference]: With dead ends: 1800 [2021-11-07 08:15:44,898 INFO L226 Difference]: Without dead ends: 1090 [2021-11-07 08:15:44,900 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:15:44,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-11-07 08:15:45,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 790. [2021-11-07 08:15:45,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 789 states have (on average 1.414448669201521) internal successors, (1116), 789 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:45,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 1116 transitions. [2021-11-07 08:15:45,041 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 1116 transitions. Word has length 242 [2021-11-07 08:15:45,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:45,042 INFO L470 AbstractCegarLoop]: Abstraction has 790 states and 1116 transitions. [2021-11-07 08:15:45,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 31 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) [2021-11-07 08:15:45,042 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 1116 transitions. [2021-11-07 08:15:45,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-11-07 08:15:45,046 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:45,046 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:45,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-07 08:15:45,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-07 08:15:45,275 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:45,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:45,275 INFO L85 PathProgramCache]: Analyzing trace with hash -888614384, now seen corresponding path program 27 times [2021-11-07 08:15:45,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:45,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751861662] [2021-11-07 08:15:45,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:45,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:45,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3134 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 2350 trivial. 0 not checked. [2021-11-07 08:15:45,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:45,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751861662] [2021-11-07 08:15:45,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751861662] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:45,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318404192] [2021-11-07 08:15:45,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:15:45,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:15:45,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:15:45,803 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:15:45,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-07 08:15:47,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-07 08:15:47,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:15:47,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 08:15:47,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:15:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3134 backedges. 325 proven. 189 refuted. 0 times theorem prover too weak. 2620 trivial. 0 not checked. [2021-11-07 08:15:48,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318404192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:48,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:15:48,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 14] total 43 [2021-11-07 08:15:48,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612120296] [2021-11-07 08:15:48,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-07 08:15:48,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:48,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-07 08:15:48,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=1272, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 08:15:48,106 INFO L87 Difference]: Start difference. First operand 790 states and 1116 transitions. Second operand has 43 states, 43 states have (on average 3.13953488372093) internal successors, (135), 43 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) [2021-11-07 08:16:15,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:15,043 INFO L93 Difference]: Finished difference Result 7439 states and 10739 transitions. [2021-11-07 08:16:15,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 361 states. [2021-11-07 08:16:15,044 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.13953488372093) internal successors, (135), 43 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 249 [2021-11-07 08:16:15,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:15,057 INFO L225 Difference]: With dead ends: 7439 [2021-11-07 08:16:15,057 INFO L226 Difference]: Without dead ends: 6706 [2021-11-07 08:16:15,064 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 908 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 370 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56769 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=37923, Invalid=100089, Unknown=0, NotChecked=0, Total=138012 [2021-11-07 08:16:15,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6706 states. [2021-11-07 08:16:15,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6706 to 830. [2021-11-07 08:16:15,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 1.4161640530759951) internal successors, (1174), 829 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:15,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1174 transitions. [2021-11-07 08:16:15,219 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1174 transitions. Word has length 249 [2021-11-07 08:16:15,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:15,219 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 1174 transitions. [2021-11-07 08:16:15,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.13953488372093) internal successors, (135), 43 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) [2021-11-07 08:16:15,220 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1174 transitions. [2021-11-07 08:16:15,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-11-07 08:16:15,222 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:15,223 INFO L513 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:15,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-07 08:16:15,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:16:15,439 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:15,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:15,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1423186434, now seen corresponding path program 28 times [2021-11-07 08:16:15,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:15,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984131891] [2021-11-07 08:16:15,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:15,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:15,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:15,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3415 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 2574 trivial. 0 not checked. [2021-11-07 08:16:15,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:15,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984131891] [2021-11-07 08:16:15,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984131891] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:16:15,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46248112] [2021-11-07 08:16:15,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:16:15,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:16:15,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:16:15,970 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:16:15,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 08:16:17,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:16:17,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:16:17,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-07 08:16:17,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:16:17,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3415 backedges. 0 proven. 2339 refuted. 0 times theorem prover too weak. 1076 trivial. 0 not checked. [2021-11-07 08:16:17,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46248112] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:16:17,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:16:17,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-11-07 08:16:17,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773729936] [2021-11-07 08:16:17,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-07 08:16:17,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:17,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-07 08:16:17,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 08:16:17,788 INFO L87 Difference]: Start difference. First operand 830 states and 1174 transitions. Second operand has 33 states, 33 states have (on average 7.03030303030303) internal successors, (232), 33 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) [2021-11-07 08:16:18,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:18,341 INFO L93 Difference]: Finished difference Result 1956 states and 2827 transitions. [2021-11-07 08:16:18,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 08:16:18,341 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 7.03030303030303) internal successors, (232), 33 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) Word has length 261 [2021-11-07 08:16:18,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:18,343 INFO L225 Difference]: With dead ends: 1956 [2021-11-07 08:16:18,344 INFO L226 Difference]: Without dead ends: 1187 [2021-11-07 08:16:18,345 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 08:16:18,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-11-07 08:16:18,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 853. [2021-11-07 08:16:18,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 1.4154929577464788) internal successors, (1206), 852 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:18,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1206 transitions. [2021-11-07 08:16:18,486 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1206 transitions. Word has length 261 [2021-11-07 08:16:18,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:18,486 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 1206 transitions. [2021-11-07 08:16:18,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 7.03030303030303) internal successors, (232), 33 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) [2021-11-07 08:16:18,486 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1206 transitions. [2021-11-07 08:16:18,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-11-07 08:16:18,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:18,489 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:18,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-07 08:16:18,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-07 08:16:18,691 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:18,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:18,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1433722598, now seen corresponding path program 29 times [2021-11-07 08:16:18,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:18,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237041746] [2021-11-07 08:16:18,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:18,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:19,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3630 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2730 trivial. 0 not checked. [2021-11-07 08:16:19,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:19,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237041746] [2021-11-07 08:16:19,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237041746] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:16:19,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343947338] [2021-11-07 08:16:19,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:16:19,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:16:19,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:16:19,211 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:16:19,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 08:16:30,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-11-07 08:16:30,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:16:30,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-07 08:16:30,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:16:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3630 backedges. 0 proven. 2495 refuted. 0 times theorem prover too weak. 1135 trivial. 0 not checked. [2021-11-07 08:16:31,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343947338] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:16:31,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:16:31,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-11-07 08:16:31,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873824669] [2021-11-07 08:16:31,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-07 08:16:31,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:31,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-07 08:16:31,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 08:16:31,317 INFO L87 Difference]: Start difference. First operand 853 states and 1206 transitions. Second operand has 34 states, 34 states have (on average 7.029411764705882) internal successors, (239), 34 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) [2021-11-07 08:16:32,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:32,006 INFO L93 Difference]: Finished difference Result 2000 states and 2889 transitions. [2021-11-07 08:16:32,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 08:16:32,007 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 7.029411764705882) internal successors, (239), 34 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) Word has length 268 [2021-11-07 08:16:32,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:32,009 INFO L225 Difference]: With dead ends: 2000 [2021-11-07 08:16:32,009 INFO L226 Difference]: Without dead ends: 1210 [2021-11-07 08:16:32,010 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 08:16:32,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-11-07 08:16:32,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 876. [2021-11-07 08:16:32,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 1.4148571428571428) internal successors, (1238), 875 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:32,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1238 transitions. [2021-11-07 08:16:32,205 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1238 transitions. Word has length 268 [2021-11-07 08:16:32,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:32,206 INFO L470 AbstractCegarLoop]: Abstraction has 876 states and 1238 transitions. [2021-11-07 08:16:32,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 7.029411764705882) internal successors, (239), 34 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) [2021-11-07 08:16:32,206 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1238 transitions. [2021-11-07 08:16:32,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-11-07 08:16:32,208 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:32,208 INFO L513 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:32,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-07 08:16:32,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:16:32,409 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:32,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:32,409 INFO L85 PathProgramCache]: Analyzing trace with hash 561138618, now seen corresponding path program 30 times [2021-11-07 08:16:32,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:32,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614829965] [2021-11-07 08:16:32,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:32,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:32,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3852 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 2891 trivial. 0 not checked. [2021-11-07 08:16:32,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:32,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614829965] [2021-11-07 08:16:32,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614829965] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:16:32,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649991901] [2021-11-07 08:16:32,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:16:32,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:16:32,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:16:32,956 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:16:32,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-07 08:16:37,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-11-07 08:16:37,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:16:37,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 08:16:37,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:16:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3852 backedges. 391 proven. 235 refuted. 0 times theorem prover too weak. 3226 trivial. 0 not checked. [2021-11-07 08:16:38,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649991901] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:16:38,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:16:38,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 15] total 47 [2021-11-07 08:16:38,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922307200] [2021-11-07 08:16:38,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-07 08:16:38,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:38,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-07 08:16:38,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=642, Invalid=1520, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 08:16:38,915 INFO L87 Difference]: Start difference. First operand 876 states and 1238 transitions. Second operand has 47 states, 47 states have (on average 3.106382978723404) internal successors, (146), 47 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) [2021-11-07 08:17:19,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:19,025 INFO L93 Difference]: Finished difference Result 8849 states and 12779 transitions. [2021-11-07 08:17:19,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 430 states. [2021-11-07 08:17:19,025 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.106382978723404) internal successors, (146), 47 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) Word has length 275 [2021-11-07 08:17:19,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:19,046 INFO L225 Difference]: With dead ends: 8849 [2021-11-07 08:17:19,046 INFO L226 Difference]: Without dead ends: 8036 [2021-11-07 08:17:19,062 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1066 GetRequests, 626 SyntacticMatches, 0 SemanticMatches, 440 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81592 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=53237, Invalid=141685, Unknown=0, NotChecked=0, Total=194922 [2021-11-07 08:17:19,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8036 states. [2021-11-07 08:17:19,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8036 to 916. [2021-11-07 08:17:19,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 1.4163934426229507) internal successors, (1296), 915 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:19,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1296 transitions. [2021-11-07 08:17:19,372 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1296 transitions. Word has length 275 [2021-11-07 08:17:19,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:19,372 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 1296 transitions. [2021-11-07 08:17:19,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.106382978723404) internal successors, (146), 47 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) [2021-11-07 08:17:19,373 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1296 transitions. [2021-11-07 08:17:19,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-11-07 08:17:19,376 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:19,376 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:19,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-07 08:17:19,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:17:19,603 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:19,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:19,603 INFO L85 PathProgramCache]: Analyzing trace with hash 236219848, now seen corresponding path program 31 times [2021-11-07 08:17:19,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:19,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134751848] [2021-11-07 08:17:19,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:19,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:20,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4163 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 3139 trivial. 0 not checked. [2021-11-07 08:17:20,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:20,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134751848] [2021-11-07 08:17:20,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134751848] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:17:20,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449023871] [2021-11-07 08:17:20,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:17:20,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:17:20,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:17:20,219 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:17:20,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 08:17:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:21,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-07 08:17:21,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:17:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4163 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 3139 trivial. 0 not checked. [2021-11-07 08:17:22,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449023871] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:17:22,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:17:22,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-11-07 08:17:22,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505711420] [2021-11-07 08:17:22,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-07 08:17:22,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:22,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-07 08:17:22,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 08:17:22,281 INFO L87 Difference]: Start difference. First operand 916 states and 1296 transitions. Second operand has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 36 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) [2021-11-07 08:17:22,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:22,980 INFO L93 Difference]: Finished difference Result 2156 states and 3117 transitions. [2021-11-07 08:17:22,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-07 08:17:22,980 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 36 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 287 [2021-11-07 08:17:22,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:22,984 INFO L225 Difference]: With dead ends: 2156 [2021-11-07 08:17:22,985 INFO L226 Difference]: Without dead ends: 1307 [2021-11-07 08:17:22,986 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 08:17:22,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2021-11-07 08:17:23,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 939. [2021-11-07 08:17:23,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 1.415778251599147) internal successors, (1328), 938 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:23,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1328 transitions. [2021-11-07 08:17:23,247 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1328 transitions. Word has length 287 [2021-11-07 08:17:23,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:23,248 INFO L470 AbstractCegarLoop]: Abstraction has 939 states and 1328 transitions. [2021-11-07 08:17:23,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 36 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) [2021-11-07 08:17:23,248 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1328 transitions. [2021-11-07 08:17:23,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-11-07 08:17:23,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:23,251 INFO L513 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:23,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-07 08:17:23,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-07 08:17:23,471 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:23,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:23,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1280011524, now seen corresponding path program 32 times [2021-11-07 08:17:23,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:23,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921874296] [2021-11-07 08:17:23,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:23,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:24,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4400 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 3311 trivial. 0 not checked. [2021-11-07 08:17:24,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:24,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921874296] [2021-11-07 08:17:24,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921874296] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:17:24,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277675557] [2021-11-07 08:17:24,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:17:24,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:17:24,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:17:24,104 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:17:24,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-07 08:17:25,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:17:25,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:17:25,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-07 08:17:25,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:17:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4400 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 3311 trivial. 0 not checked. [2021-11-07 08:17:26,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277675557] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:17:26,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:17:26,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-11-07 08:17:26,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247625646] [2021-11-07 08:17:26,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-07 08:17:26,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:26,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-07 08:17:26,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 08:17:26,349 INFO L87 Difference]: Start difference. First operand 939 states and 1328 transitions. Second operand has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 37 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) [2021-11-07 08:17:27,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:27,191 INFO L93 Difference]: Finished difference Result 2200 states and 3179 transitions. [2021-11-07 08:17:27,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 08:17:27,191 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 37 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 294 [2021-11-07 08:17:27,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:27,196 INFO L225 Difference]: With dead ends: 2200 [2021-11-07 08:17:27,196 INFO L226 Difference]: Without dead ends: 1330 [2021-11-07 08:17:27,199 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 08:17:27,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2021-11-07 08:17:27,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 962. [2021-11-07 08:17:27,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 961 states have (on average 1.4151925078043703) internal successors, (1360), 961 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:27,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 1360 transitions. [2021-11-07 08:17:27,429 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 1360 transitions. Word has length 294 [2021-11-07 08:17:27,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:27,429 INFO L470 AbstractCegarLoop]: Abstraction has 962 states and 1360 transitions. [2021-11-07 08:17:27,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 37 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) [2021-11-07 08:17:27,430 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 1360 transitions. [2021-11-07 08:17:27,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-11-07 08:17:27,433 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:27,433 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:27,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-07 08:17:27,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-07 08:17:27,637 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:27,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:27,638 INFO L85 PathProgramCache]: Analyzing trace with hash 465432580, now seen corresponding path program 33 times [2021-11-07 08:17:27,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:27,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824366855] [2021-11-07 08:17:27,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:27,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:28,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4644 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 3488 trivial. 0 not checked. [2021-11-07 08:17:28,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:28,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824366855] [2021-11-07 08:17:28,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824366855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:17:28,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844422432] [2021-11-07 08:17:28,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:17:28,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:17:28,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:17:28,369 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:17:28,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-07 08:17:30,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-07 08:17:30,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:17:30,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 08:17:30,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:17:31,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4644 backedges. 463 proven. 286 refuted. 0 times theorem prover too weak. 3895 trivial. 0 not checked. [2021-11-07 08:17:31,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844422432] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:17:31,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:17:31,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 16] total 51 [2021-11-07 08:17:31,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842294041] [2021-11-07 08:17:31,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-07 08:17:31,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:31,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-07 08:17:31,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=760, Invalid=1790, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 08:17:31,249 INFO L87 Difference]: Start difference. First operand 962 states and 1360 transitions. Second operand has 51 states, 51 states have (on average 3.0784313725490198) internal successors, (157), 51 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) [2021-11-07 08:18:31,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:18:31,269 INFO L93 Difference]: Finished difference Result 10379 states and 14993 transitions. [2021-11-07 08:18:31,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 505 states. [2021-11-07 08:18:31,270 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.0784313725490198) internal successors, (157), 51 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 301 [2021-11-07 08:18:31,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:18:31,280 INFO L225 Difference]: With dead ends: 10379 [2021-11-07 08:18:31,280 INFO L226 Difference]: Without dead ends: 9486 [2021-11-07 08:18:31,294 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1236 GetRequests, 720 SyntacticMatches, 0 SemanticMatches, 516 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113752 ImplicationChecksByTransitivity, 34.5s TimeCoverageRelationStatistics Valid=72752, Invalid=195054, Unknown=0, NotChecked=0, Total=267806 [2021-11-07 08:18:31,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9486 states. [2021-11-07 08:18:31,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9486 to 1002. [2021-11-07 08:18:31,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 1001 states have (on average 1.4165834165834166) internal successors, (1418), 1001 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:31,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1418 transitions. [2021-11-07 08:18:31,561 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1418 transitions. Word has length 301 [2021-11-07 08:18:31,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:18:31,561 INFO L470 AbstractCegarLoop]: Abstraction has 1002 states and 1418 transitions. [2021-11-07 08:18:31,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.0784313725490198) internal successors, (157), 51 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) [2021-11-07 08:18:31,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1418 transitions. [2021-11-07 08:18:31,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2021-11-07 08:18:31,565 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:18:31,565 INFO L513 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:18:31,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-07 08:18:31,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-07 08:18:31,779 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:18:31,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:18:31,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1802112014, now seen corresponding path program 34 times [2021-11-07 08:18:31,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:18:31,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30924387] [2021-11-07 08:18:31,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:18:31,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:18:31,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:18:32,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4985 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 3760 trivial. 0 not checked. [2021-11-07 08:18:32,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:18:32,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30924387] [2021-11-07 08:18:32,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30924387] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:18:32,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462183050] [2021-11-07 08:18:32,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:18:32,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:18:32,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:18:32,551 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:18:32,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-07 08:18:34,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:18:34,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:18:34,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 1145 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-07 08:18:34,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:18:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4985 backedges. 0 proven. 3418 refuted. 0 times theorem prover too weak. 1567 trivial. 0 not checked. [2021-11-07 08:18:35,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462183050] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:18:35,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:18:35,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-11-07 08:18:35,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66324156] [2021-11-07 08:18:35,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-07 08:18:35,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:18:35,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-07 08:18:35,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 08:18:35,134 INFO L87 Difference]: Start difference. First operand 1002 states and 1418 transitions. Second operand has 39 states, 39 states have (on average 7.0256410256410255) internal successors, (274), 39 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) [2021-11-07 08:18:36,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:18:36,066 INFO L93 Difference]: Finished difference Result 2356 states and 3407 transitions. [2021-11-07 08:18:36,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 08:18:36,067 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 7.0256410256410255) internal successors, (274), 39 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) Word has length 313 [2021-11-07 08:18:36,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:18:36,068 INFO L225 Difference]: With dead ends: 2356 [2021-11-07 08:18:36,068 INFO L226 Difference]: Without dead ends: 1427 [2021-11-07 08:18:36,070 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 08:18:36,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2021-11-07 08:18:36,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1025. [2021-11-07 08:18:36,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1024 states have (on average 1.416015625) internal successors, (1450), 1024 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:36,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1450 transitions. [2021-11-07 08:18:36,398 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1450 transitions. Word has length 313 [2021-11-07 08:18:36,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:18:36,398 INFO L470 AbstractCegarLoop]: Abstraction has 1025 states and 1450 transitions. [2021-11-07 08:18:36,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 7.0256410256410255) internal successors, (274), 39 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) [2021-11-07 08:18:36,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1450 transitions. [2021-11-07 08:18:36,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-11-07 08:18:36,403 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:18:36,404 INFO L513 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:18:36,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-07 08:18:36,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-07 08:18:36,607 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:18:36,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:18:36,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1446846578, now seen corresponding path program 35 times [2021-11-07 08:18:36,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:18:36,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247662789] [2021-11-07 08:18:36,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:18:36,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:18:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:18:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5244 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 3948 trivial. 0 not checked. [2021-11-07 08:18:37,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:18:37,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247662789] [2021-11-07 08:18:37,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247662789] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:18:37,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905638289] [2021-11-07 08:18:37,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:18:37,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:18:37,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:18:37,515 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:18:37,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-07 08:18:53,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2021-11-07 08:18:53,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:18:54,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-07 08:18:54,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:18:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5244 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 3948 trivial. 0 not checked. [2021-11-07 08:18:54,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905638289] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:18:54,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:18:54,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-11-07 08:18:54,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990064867] [2021-11-07 08:18:54,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-07 08:18:54,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:18:54,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-07 08:18:54,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 08:18:54,649 INFO L87 Difference]: Start difference. First operand 1025 states and 1450 transitions. Second operand has 40 states, 40 states have (on average 2.325) internal successors, (93), 40 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) [2021-11-07 08:18:55,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:18:55,719 INFO L93 Difference]: Finished difference Result 2400 states and 3469 transitions. [2021-11-07 08:18:55,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-07 08:18:55,719 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 40 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 320 [2021-11-07 08:18:55,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:18:55,721 INFO L225 Difference]: With dead ends: 2400 [2021-11-07 08:18:55,721 INFO L226 Difference]: Without dead ends: 1450 [2021-11-07 08:18:55,722 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 08:18:55,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1450 states. [2021-11-07 08:18:55,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1450 to 1048. [2021-11-07 08:18:55,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 1.4154727793696276) internal successors, (1482), 1047 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:55,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1482 transitions. [2021-11-07 08:18:55,922 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1482 transitions. Word has length 320 [2021-11-07 08:18:55,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:18:55,922 INFO L470 AbstractCegarLoop]: Abstraction has 1048 states and 1482 transitions. [2021-11-07 08:18:55,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 40 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) [2021-11-07 08:18:55,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1482 transitions. [2021-11-07 08:18:55,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-11-07 08:18:55,925 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:18:55,926 INFO L513 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:18:55,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-07 08:18:56,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-07 08:18:56,127 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:18:56,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:18:56,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1738355374, now seen corresponding path program 36 times [2021-11-07 08:18:56,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:18:56,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009187555] [2021-11-07 08:18:56,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:18:56,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:18:56,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:18:56,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5510 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 4141 trivial. 0 not checked. [2021-11-07 08:18:56,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:18:56,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009187555] [2021-11-07 08:18:56,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009187555] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:18:56,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555144187] [2021-11-07 08:18:56,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:18:56,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:18:56,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:18:56,935 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:18:56,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-07 08:19:03,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-11-07 08:19:03,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:19:03,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 08:19:03,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:19:05,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5510 backedges. 541 proven. 342 refuted. 0 times theorem prover too weak. 4627 trivial. 0 not checked. [2021-11-07 08:19:05,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555144187] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:19:05,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:19:05,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 17] total 55 [2021-11-07 08:19:05,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585666671] [2021-11-07 08:19:05,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-07 08:19:05,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:19:05,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-07 08:19:05,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=888, Invalid=2082, Unknown=0, NotChecked=0, Total=2970 [2021-11-07 08:19:05,190 INFO L87 Difference]: Start difference. First operand 1048 states and 1482 transitions. Second operand has 55 states, 55 states have (on average 3.0545454545454547) internal successors, (168), 55 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:30,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:30,735 INFO L93 Difference]: Finished difference Result 12029 states and 17381 transitions. [2021-11-07 08:20:30,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 586 states. [2021-11-07 08:20:30,736 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.0545454545454547) internal successors, (168), 55 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 327 [2021-11-07 08:20:30,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:30,748 INFO L225 Difference]: With dead ends: 12029 [2021-11-07 08:20:30,748 INFO L226 Difference]: Without dead ends: 11056 [2021-11-07 08:20:30,769 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1418 GetRequests, 820 SyntacticMatches, 0 SemanticMatches, 598 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154564 ImplicationChecksByTransitivity, 47.2s TimeCoverageRelationStatistics Valid=97170, Invalid=262230, Unknown=0, NotChecked=0, Total=359400 [2021-11-07 08:20:30,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11056 states. [2021-11-07 08:20:31,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11056 to 1088. [2021-11-07 08:20:31,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 1.4167433302667893) internal successors, (1540), 1087 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:31,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 1540 transitions. [2021-11-07 08:20:31,092 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 1540 transitions. Word has length 327 [2021-11-07 08:20:31,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:31,093 INFO L470 AbstractCegarLoop]: Abstraction has 1088 states and 1540 transitions. [2021-11-07 08:20:31,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.0545454545454547) internal successors, (168), 55 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:31,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 1540 transitions. [2021-11-07 08:20:31,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-11-07 08:20:31,096 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:31,096 INFO L513 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:31,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-07 08:20:31,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:20:31,297 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:20:31,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:31,298 INFO L85 PathProgramCache]: Analyzing trace with hash -2014700356, now seen corresponding path program 37 times [2021-11-07 08:20:31,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:20:31,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840326330] [2021-11-07 08:20:31,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:31,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:20:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5881 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 4437 trivial. 0 not checked. [2021-11-07 08:20:32,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:20:32,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840326330] [2021-11-07 08:20:32,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840326330] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:20:32,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108983609] [2021-11-07 08:20:32,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:20:32,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:20:32,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:20:32,191 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:20:32,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-07 08:20:34,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:34,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-07 08:20:34,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:20:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5881 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 4437 trivial. 0 not checked. [2021-11-07 08:20:35,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108983609] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:20:35,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:20:35,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-11-07 08:20:35,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30794592] [2021-11-07 08:20:35,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-07 08:20:35,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:35,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-07 08:20:35,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 08:20:35,688 INFO L87 Difference]: Start difference. First operand 1088 states and 1540 transitions. Second operand has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 42 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) [2021-11-07 08:20:37,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:37,027 INFO L93 Difference]: Finished difference Result 2556 states and 3697 transitions. [2021-11-07 08:20:37,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-07 08:20:37,027 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 42 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 339 [2021-11-07 08:20:37,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:37,030 INFO L225 Difference]: With dead ends: 2556 [2021-11-07 08:20:37,030 INFO L226 Difference]: Without dead ends: 1547 [2021-11-07 08:20:37,032 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 08:20:37,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2021-11-07 08:20:37,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1111. [2021-11-07 08:20:37,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 1110 states have (on average 1.4162162162162162) internal successors, (1572), 1110 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:37,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 1572 transitions. [2021-11-07 08:20:37,368 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 1572 transitions. Word has length 339 [2021-11-07 08:20:37,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:37,369 INFO L470 AbstractCegarLoop]: Abstraction has 1111 states and 1572 transitions. [2021-11-07 08:20:37,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 42 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) [2021-11-07 08:20:37,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 1572 transitions. [2021-11-07 08:20:37,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-11-07 08:20:37,374 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:37,374 INFO L513 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:37,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-07 08:20:37,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-07 08:20:37,587 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:20:37,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:37,587 INFO L85 PathProgramCache]: Analyzing trace with hash 991390600, now seen corresponding path program 38 times [2021-11-07 08:20:37,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:20:37,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429178510] [2021-11-07 08:20:37,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:37,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:20:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 4641 trivial. 0 not checked. [2021-11-07 08:20:38,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:20:38,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429178510] [2021-11-07 08:20:38,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429178510] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:20:38,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671806237] [2021-11-07 08:20:38,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:20:38,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:20:38,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:20:38,677 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:20:38,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-07 08:20:41,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:20:41,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:20:41,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 1261 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-07 08:20:41,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:20:42,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 4641 trivial. 0 not checked. [2021-11-07 08:20:42,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671806237] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:20:42,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:20:42,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-11-07 08:20:42,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436841691] [2021-11-07 08:20:42,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-07 08:20:42,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:42,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-07 08:20:42,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 08:20:42,052 INFO L87 Difference]: Start difference. First operand 1111 states and 1572 transitions. Second operand has 43 states, 43 states have (on average 2.302325581395349) internal successors, (99), 43 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) [2021-11-07 08:20:43,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:43,522 INFO L93 Difference]: Finished difference Result 2600 states and 3759 transitions. [2021-11-07 08:20:43,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-07 08:20:43,522 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.302325581395349) internal successors, (99), 43 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 346 [2021-11-07 08:20:43,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:43,524 INFO L225 Difference]: With dead ends: 2600 [2021-11-07 08:20:43,525 INFO L226 Difference]: Without dead ends: 1570 [2021-11-07 08:20:43,527 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 08:20:43,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1570 states. [2021-11-07 08:20:43,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1570 to 1134. [2021-11-07 08:20:43,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1133 states have (on average 1.415710503089144) internal successors, (1604), 1133 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:43,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 1604 transitions. [2021-11-07 08:20:43,957 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 1604 transitions. Word has length 346 [2021-11-07 08:20:43,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:43,958 INFO L470 AbstractCegarLoop]: Abstraction has 1134 states and 1604 transitions. [2021-11-07 08:20:43,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.302325581395349) internal successors, (99), 43 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) [2021-11-07 08:20:43,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 1604 transitions. [2021-11-07 08:20:43,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2021-11-07 08:20:43,961 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:43,962 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:43,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-07 08:20:44,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:20:44,162 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:20:44,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:44,163 INFO L85 PathProgramCache]: Analyzing trace with hash 18987000, now seen corresponding path program 39 times [2021-11-07 08:20:44,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:20:44,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947710709] [2021-11-07 08:20:44,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:44,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:20:44,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6450 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 4850 trivial. 0 not checked. [2021-11-07 08:20:45,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:20:45,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947710709] [2021-11-07 08:20:45,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947710709] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:20:45,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996942050] [2021-11-07 08:20:45,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:20:45,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:20:45,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:20:45,295 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:20:45,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-07 08:20:48,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-07 08:20:48,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:20:48,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 08:20:48,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:20:49,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6450 backedges. 625 proven. 403 refuted. 0 times theorem prover too weak. 5422 trivial. 0 not checked. [2021-11-07 08:20:49,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996942050] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:20:49,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:20:49,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 18] total 59 [2021-11-07 08:20:49,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892168309] [2021-11-07 08:20:49,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-07 08:20:49,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:49,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-07 08:20:49,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=2396, Unknown=0, NotChecked=0, Total=3422 [2021-11-07 08:20:49,854 INFO L87 Difference]: Start difference. First operand 1134 states and 1604 transitions. Second operand has 59 states, 59 states have (on average 3.0338983050847457) internal successors, (179), 59 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) [2021-11-07 08:22:57,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:22:57,412 INFO L93 Difference]: Finished difference Result 13799 states and 19943 transitions. [2021-11-07 08:22:57,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 673 states. [2021-11-07 08:22:57,412 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.0338983050847457) internal successors, (179), 59 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 353 [2021-11-07 08:22:57,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:22:57,431 INFO L225 Difference]: With dead ends: 13799 [2021-11-07 08:22:57,431 INFO L226 Difference]: Without dead ends: 12746 [2021-11-07 08:22:57,457 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1612 GetRequests, 926 SyntacticMatches, 0 SemanticMatches, 686 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205451 ImplicationChecksByTransitivity, 66.5s TimeCoverageRelationStatistics Valid=127247, Invalid=345409, Unknown=0, NotChecked=0, Total=472656 [2021-11-07 08:22:57,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12746 states. [2021-11-07 08:22:57,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12746 to 1174. [2021-11-07 08:22:57,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 1.4168797953964194) internal successors, (1662), 1173 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:22:57,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1662 transitions. [2021-11-07 08:22:57,943 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1662 transitions. Word has length 353 [2021-11-07 08:22:57,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:22:57,943 INFO L470 AbstractCegarLoop]: Abstraction has 1174 states and 1662 transitions. [2021-11-07 08:22:57,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.0338983050847457) internal successors, (179), 59 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) [2021-11-07 08:22:57,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1662 transitions. [2021-11-07 08:22:57,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2021-11-07 08:22:57,947 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:22:57,947 INFO L513 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:22:57,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-11-07 08:22:58,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:22:58,148 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:22:58,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:22:58,148 INFO L85 PathProgramCache]: Analyzing trace with hash 201632742, now seen corresponding path program 40 times [2021-11-07 08:22:58,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:22:58,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058788680] [2021-11-07 08:22:58,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:22:58,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:22:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:22:59,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6851 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 5170 trivial. 0 not checked. [2021-11-07 08:22:59,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:22:59,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058788680] [2021-11-07 08:22:59,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058788680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:22:59,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619757909] [2021-11-07 08:22:59,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:22:59,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:22:59,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:22:59,346 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:22:59,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-07 08:23:02,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:23:02,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:23:02,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 1331 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-07 08:23:02,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:23:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6851 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 5170 trivial. 0 not checked. [2021-11-07 08:23:03,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619757909] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:23:03,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:23:03,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-11-07 08:23:03,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523613687] [2021-11-07 08:23:03,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-07 08:23:03,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:23:03,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-07 08:23:03,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 08:23:03,319 INFO L87 Difference]: Start difference. First operand 1174 states and 1662 transitions. Second operand has 45 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 45 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) [2021-11-07 08:23:04,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:23:04,761 INFO L93 Difference]: Finished difference Result 2756 states and 3987 transitions. [2021-11-07 08:23:04,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-07 08:23:04,762 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 45 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 365 [2021-11-07 08:23:04,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:23:04,765 INFO L225 Difference]: With dead ends: 2756 [2021-11-07 08:23:04,765 INFO L226 Difference]: Without dead ends: 1667 [2021-11-07 08:23:04,768 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 08:23:04,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2021-11-07 08:23:05,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1197. [2021-11-07 08:23:05,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 1.4163879598662208) internal successors, (1694), 1196 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:23:05,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1694 transitions. [2021-11-07 08:23:05,219 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1694 transitions. Word has length 365 [2021-11-07 08:23:05,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:23:05,220 INFO L470 AbstractCegarLoop]: Abstraction has 1197 states and 1694 transitions. [2021-11-07 08:23:05,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 45 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) [2021-11-07 08:23:05,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1694 transitions. [2021-11-07 08:23:05,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2021-11-07 08:23:05,225 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:23:05,225 INFO L513 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:23:05,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-07 08:23:05,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-07 08:23:05,439 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:23:05,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:23:05,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1628014594, now seen corresponding path program 41 times [2021-11-07 08:23:05,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:23:05,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662896416] [2021-11-07 08:23:05,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:23:05,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:23:05,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:23:06,465 INFO L134 CoverageAnalysis]: Checked inductivity of 7154 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 5390 trivial. 0 not checked. [2021-11-07 08:23:06,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:23:06,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662896416] [2021-11-07 08:23:06,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662896416] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:23:06,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855459840] [2021-11-07 08:23:06,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:23:06,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:23:06,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:23:06,468 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:23:06,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-07 08:23:45,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2021-11-07 08:23:45,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:23:45,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 1354 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-07 08:23:45,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:23:46,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7154 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 5390 trivial. 0 not checked. [2021-11-07 08:23:46,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855459840] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:23:46,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:23:46,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-11-07 08:23:46,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985509173] [2021-11-07 08:23:46,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-07 08:23:46,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:23:46,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-07 08:23:46,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 08:23:46,633 INFO L87 Difference]: Start difference. First operand 1197 states and 1694 transitions. Second operand has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 46 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) [2021-11-07 08:23:48,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:23:48,121 INFO L93 Difference]: Finished difference Result 2800 states and 4049 transitions. [2021-11-07 08:23:48,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-07 08:23:48,121 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 46 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 372 [2021-11-07 08:23:48,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:23:48,123 INFO L225 Difference]: With dead ends: 2800 [2021-11-07 08:23:48,123 INFO L226 Difference]: Without dead ends: 1690 [2021-11-07 08:23:48,125 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 08:23:48,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2021-11-07 08:23:48,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1220. [2021-11-07 08:23:48,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1219 states have (on average 1.4159146841673502) internal successors, (1726), 1219 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:23:48,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 1726 transitions. [2021-11-07 08:23:48,593 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 1726 transitions. Word has length 372 [2021-11-07 08:23:48,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:23:48,593 INFO L470 AbstractCegarLoop]: Abstraction has 1220 states and 1726 transitions. [2021-11-07 08:23:48,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 46 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) [2021-11-07 08:23:48,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 1726 transitions. [2021-11-07 08:23:48,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2021-11-07 08:23:48,597 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:23:48,597 INFO L513 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:23:48,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-07 08:23:48,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-07 08:23:48,798 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:23:48,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:23:48,798 INFO L85 PathProgramCache]: Analyzing trace with hash 823608226, now seen corresponding path program 42 times [2021-11-07 08:23:48,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:23:48,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589080736] [2021-11-07 08:23:48,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:23:48,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:23:48,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:23:49,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7464 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 5615 trivial. 0 not checked. [2021-11-07 08:23:49,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:23:49,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589080736] [2021-11-07 08:23:49,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589080736] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:23:49,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593493232] [2021-11-07 08:23:49,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:23:49,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:23:49,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:23:49,781 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:23:49,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2e86aaf-aa7b-4ef8-ab42-d0f62ef6f4c3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-07 08:24:03,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-11-07 08:24:03,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:24:03,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 08:24:03,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:24:05,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7464 backedges. 715 proven. 469 refuted. 0 times theorem prover too weak. 6280 trivial. 0 not checked. [2021-11-07 08:24:05,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593493232] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:24:05,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:24:05,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 19] total 63 [2021-11-07 08:24:05,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433063809] [2021-11-07 08:24:05,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-07 08:24:05,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:24:05,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-07 08:24:05,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1174, Invalid=2732, Unknown=0, NotChecked=0, Total=3906 [2021-11-07 08:24:05,138 INFO L87 Difference]: Start difference. First operand 1220 states and 1726 transitions. Second operand has 63 states, 63 states have (on average 3.015873015873016) internal successors, (190), 63 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)