./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD --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 39463d01f5c85d47bf5e231172595e96b8ff556c59c4a9ab8cf46a88a393b05c ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:55:31,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:55:31,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:55:31,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:55:31,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:55:31,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:55:31,420 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:55:31,423 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:55:31,425 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:55:31,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:55:31,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:55:31,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:55:31,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:55:31,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:55:31,434 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:55:31,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:55:31,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:55:31,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:55:31,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:55:31,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:55:31,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:55:31,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:55:31,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:55:31,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:55:31,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:55:31,462 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:55:31,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:55:31,471 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:55:31,471 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:55:31,474 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:55:31,474 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:55:31,475 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:55:31,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:55:31,479 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:55:31,481 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:55:31,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:55:31,483 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:55:31,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:55:31,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:55:31,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:55:31,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:55:31,487 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 23:55:31,549 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:55:31,550 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:55:31,551 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:55:31,551 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:55:31,560 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:55:31,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:55:31,562 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:55:31,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:55:31,562 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:55:31,563 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:55:31,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:55:31,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:55:31,565 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 23:55:31,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:55:31,565 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 23:55:31,565 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:55:31,566 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 23:55:31,566 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:55:31,566 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 23:55:31,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:55:31,567 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:55:31,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:55:31,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:55:31,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:55:31,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:55:31,568 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 23:55:31,569 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:55:31,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:55:31,569 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 23:55:31,571 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 23:55:31,572 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 23:55:31,572 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:55:31,572 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_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39463d01f5c85d47bf5e231172595e96b8ff556c59c4a9ab8cf46a88a393b05c [2021-10-28 23:55:31,869 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:55:31,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:55:31,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:55:31,901 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:55:31,902 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:55:31,904 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2021-10-28 23:55:31,990 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/data/c997e426e/53cd38b391e2467ebfe714018457d6ad/FLAG72faba118 [2021-10-28 23:55:32,588 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:55:32,589 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2021-10-28 23:55:32,603 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/data/c997e426e/53cd38b391e2467ebfe714018457d6ad/FLAG72faba118 [2021-10-28 23:55:32,921 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/data/c997e426e/53cd38b391e2467ebfe714018457d6ad [2021-10-28 23:55:32,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:55:32,928 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:55:32,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:55:32,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:55:32,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:55:32,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:55:32" (1/1) ... [2021-10-28 23:55:32,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2887fd8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:55:32, skipping insertion in model container [2021-10-28 23:55:32,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:55:32" (1/1) ... [2021-10-28 23:55:32,959 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:55:32,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:55:33,270 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_4e05ca00-6e14-423d-b51a-57070dcf8e83/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c[465,478] [2021-10-28 23:55:33,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:55:33,298 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:55:33,314 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_4e05ca00-6e14-423d-b51a-57070dcf8e83/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c[465,478] [2021-10-28 23:55:33,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:55:33,359 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:55:33,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:55:33 WrapperNode [2021-10-28 23:55:33,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:55:33,363 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:55:33,364 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:55:33,364 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:55:33,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:55:33" (1/1) ... [2021-10-28 23:55:33,384 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:55:33" (1/1) ... [2021-10-28 23:55:33,419 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:55:33,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:55:33,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:55:33,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:55:33,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:55:33" (1/1) ... [2021-10-28 23:55:33,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:55:33" (1/1) ... [2021-10-28 23:55:33,447 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:55:33" (1/1) ... [2021-10-28 23:55:33,448 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:55:33" (1/1) ... [2021-10-28 23:55:33,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:55:33" (1/1) ... [2021-10-28 23:55:33,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:55:33" (1/1) ... [2021-10-28 23:55:33,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:55:33" (1/1) ... [2021-10-28 23:55:33,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:55:33,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:55:33,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:55:33,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:55:33,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:55:33" (1/1) ... [2021-10-28 23:55:33,472 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:55:33,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:33,499 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:33,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:55:33,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:55:33,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:55:33,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:55:33,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:55:33,824 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:55:33,824 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-28 23:55:33,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:55:33 BoogieIcfgContainer [2021-10-28 23:55:33,826 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:55:33,829 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:55:33,829 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:55:33,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:55:33,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:55:32" (1/3) ... [2021-10-28 23:55:33,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36007ccd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:55:33, skipping insertion in model container [2021-10-28 23:55:33,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:55:33" (2/3) ... [2021-10-28 23:55:33,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36007ccd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:55:33, skipping insertion in model container [2021-10-28 23:55:33,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:55:33" (3/3) ... [2021-10-28 23:55:33,837 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_delay_nd.c [2021-10-28 23:55:33,844 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:55:33,844 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 23:55:33,900 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:55:33,909 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 [2021-10-28 23:55:33,909 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 23:55:33,929 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:33,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 23:55:33,936 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:55:33,937 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:33,937 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:55:33,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:33,945 INFO L85 PathProgramCache]: Analyzing trace with hash -493598204, now seen corresponding path program 1 times [2021-10-28 23:55:33,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:33,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533642032] [2021-10-28 23:55:33,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:33,959 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:34,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:34,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:34,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533642032] [2021-10-28 23:55:34,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533642032] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:55:34,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:55:34,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 23:55:34,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762898571] [2021-10-28 23:55:34,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 23:55:34,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:34,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 23:55:34,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 23:55:34,187 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:34,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:34,205 INFO L93 Difference]: Finished difference Result 33 states and 53 transitions. [2021-10-28 23:55:34,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 23:55:34,208 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-28 23:55:34,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:55:34,218 INFO L225 Difference]: With dead ends: 33 [2021-10-28 23:55:34,219 INFO L226 Difference]: Without dead ends: 16 [2021-10-28 23:55:34,222 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 23:55:34,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-28 23:55:34,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-28 23:55:34,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:34,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2021-10-28 23:55:34,266 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 12 [2021-10-28 23:55:34,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:55:34,269 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2021-10-28 23:55:34,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:34,270 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2021-10-28 23:55:34,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 23:55:34,271 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:55:34,272 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:34,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 23:55:34,273 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:55:34,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:34,277 INFO L85 PathProgramCache]: Analyzing trace with hash -2059231113, now seen corresponding path program 1 times [2021-10-28 23:55:34,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:34,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137283790] [2021-10-28 23:55:34,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:34,280 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:34,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:34,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137283790] [2021-10-28 23:55:34,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137283790] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:55:34,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:55:34,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:55:34,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320382644] [2021-10-28 23:55:34,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:55:34,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:34,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:55:34,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:55:34,517 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:34,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:34,624 INFO L93 Difference]: Finished difference Result 32 states and 46 transitions. [2021-10-28 23:55:34,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:55:34,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-28 23:55:34,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:55:34,626 INFO L225 Difference]: With dead ends: 32 [2021-10-28 23:55:34,626 INFO L226 Difference]: Without dead ends: 20 [2021-10-28 23:55:34,627 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:55:34,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-28 23:55:34,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-10-28 23:55:34,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:34,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2021-10-28 23:55:34,633 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 12 [2021-10-28 23:55:34,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:55:34,634 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-10-28 23:55:34,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:34,634 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2021-10-28 23:55:34,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 23:55:34,635 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:55:34,635 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:34,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 23:55:34,636 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:55:34,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:34,637 INFO L85 PathProgramCache]: Analyzing trace with hash 573171571, now seen corresponding path program 1 times [2021-10-28 23:55:34,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:34,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637835562] [2021-10-28 23:55:34,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:34,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:55:34,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:34,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637835562] [2021-10-28 23:55:34,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637835562] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:55:34,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:55:34,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:55:34,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287732633] [2021-10-28 23:55:34,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 23:55:34,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:34,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:55:34,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:55:34,770 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:34,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:34,830 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2021-10-28 23:55:34,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:55:34,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 [2021-10-28 23:55:34,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:55:34,832 INFO L225 Difference]: With dead ends: 38 [2021-10-28 23:55:34,832 INFO L226 Difference]: Without dead ends: 25 [2021-10-28 23:55:34,833 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 [2021-10-28 23:55:34,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-28 23:55:34,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2021-10-28 23:55:34,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:34,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-10-28 23:55:34,838 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 15 [2021-10-28 23:55:34,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:55:34,839 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-10-28 23:55:34,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:34,839 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-10-28 23:55:34,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 23:55:34,840 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:55:34,841 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:34,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 23:55:34,841 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:55:34,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:34,842 INFO L85 PathProgramCache]: Analyzing trace with hash 630429873, now seen corresponding path program 1 times [2021-10-28 23:55:34,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:34,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284207138] [2021-10-28 23:55:34,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:34,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:34,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:55:34,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:34,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284207138] [2021-10-28 23:55:34,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284207138] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:55:34,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:55:34,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:55:34,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627679115] [2021-10-28 23:55:34,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:55:34,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:34,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:55:34,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:55:34,950 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:34,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:34,987 INFO L93 Difference]: Finished difference Result 46 states and 64 transitions. [2021-10-28 23:55:34,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:55:34,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 [2021-10-28 23:55:34,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:55:34,991 INFO L225 Difference]: With dead ends: 46 [2021-10-28 23:55:34,992 INFO L226 Difference]: Without dead ends: 32 [2021-10-28 23:55:34,992 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:55:34,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-28 23:55:35,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-10-28 23:55:35,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 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) [2021-10-28 23:55:35,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 42 transitions. [2021-10-28 23:55:35,004 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 42 transitions. Word has length 15 [2021-10-28 23:55:35,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:55:35,004 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 42 transitions. [2021-10-28 23:55:35,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:35,005 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 42 transitions. [2021-10-28 23:55:35,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 23:55:35,006 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:55:35,006 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:35,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 23:55:35,007 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:55:35,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:35,008 INFO L85 PathProgramCache]: Analyzing trace with hash 630489455, now seen corresponding path program 1 times [2021-10-28 23:55:35,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:35,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045199661] [2021-10-28 23:55:35,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:35,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:35,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:35,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:35,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045199661] [2021-10-28 23:55:35,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045199661] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:35,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132856808] [2021-10-28 23:55:35,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:35,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:35,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:35,088 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:35,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:55:35,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:35,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:55:35,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:35,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:35,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132856808] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:35,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:55:35,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-10-28 23:55:35,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256111162] [2021-10-28 23:55:35,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:55:35,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:35,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:55:35,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:55:35,323 INFO L87 Difference]: Start difference. First operand 30 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:35,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:35,403 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2021-10-28 23:55:35,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:55:35,404 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 [2021-10-28 23:55:35,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:55:35,405 INFO L225 Difference]: With dead ends: 67 [2021-10-28 23:55:35,406 INFO L226 Difference]: Without dead ends: 41 [2021-10-28 23:55:35,407 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:55:35,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-28 23:55:35,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2021-10-28 23:55:35,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 35 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:35,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 50 transitions. [2021-10-28 23:55:35,417 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 50 transitions. Word has length 15 [2021-10-28 23:55:35,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:55:35,417 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 50 transitions. [2021-10-28 23:55:35,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:35,418 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 50 transitions. [2021-10-28 23:55:35,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 23:55:35,419 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:55:35,420 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:35,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:35,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:35,641 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:55:35,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:35,642 INFO L85 PathProgramCache]: Analyzing trace with hash 730990835, now seen corresponding path program 2 times [2021-10-28 23:55:35,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:35,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305218352] [2021-10-28 23:55:35,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:35,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:35,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:35,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:35,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305218352] [2021-10-28 23:55:35,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305218352] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:35,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826331246] [2021-10-28 23:55:35,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:55:35,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:35,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:35,751 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:35,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 23:55:35,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:55:35,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:55:35,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 23:55:35,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 23:55:36,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826331246] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:36,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:55:36,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-28 23:55:36,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100786205] [2021-10-28 23:55:36,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:55:36,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:36,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:55:36,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:55:36,056 INFO L87 Difference]: Start difference. First operand 36 states and 50 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) [2021-10-28 23:55:36,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:36,314 INFO L93 Difference]: Finished difference Result 123 states and 179 transitions. [2021-10-28 23:55:36,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:55:36,315 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 18 [2021-10-28 23:55:36,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:55:36,322 INFO L225 Difference]: With dead ends: 123 [2021-10-28 23:55:36,322 INFO L226 Difference]: Without dead ends: 91 [2021-10-28 23:55:36,326 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:55:36,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-28 23:55:36,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2021-10-28 23:55:36,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.3733333333333333) internal successors, (103), 75 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) [2021-10-28 23:55:36,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 103 transitions. [2021-10-28 23:55:36,358 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 103 transitions. Word has length 18 [2021-10-28 23:55:36,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:55:36,359 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 103 transitions. [2021-10-28 23:55:36,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) [2021-10-28 23:55:36,359 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 103 transitions. [2021-10-28 23:55:36,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 23:55:36,361 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:55:36,362 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:36,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-28 23:55:36,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:36,563 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:55:36,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:36,564 INFO L85 PathProgramCache]: Analyzing trace with hash -104466575, now seen corresponding path program 1 times [2021-10-28 23:55:36,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:36,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562584020] [2021-10-28 23:55:36,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:36,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:36,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:36,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562584020] [2021-10-28 23:55:36,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562584020] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:36,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484343243] [2021-10-28 23:55:36,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:36,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:36,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:36,679 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:36,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 23:55:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:36,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 23:55:36,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:36,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484343243] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:36,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:55:36,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-28 23:55:36,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992370916] [2021-10-28 23:55:36,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 23:55:36,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:36,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 23:55:36,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:55:36,978 INFO L87 Difference]: Start difference. First operand 76 states and 103 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:37,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:37,093 INFO L93 Difference]: Finished difference Result 199 states and 271 transitions. [2021-10-28 23:55:37,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:55:37,094 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-28 23:55:37,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:55:37,096 INFO L225 Difference]: With dead ends: 199 [2021-10-28 23:55:37,096 INFO L226 Difference]: Without dead ends: 127 [2021-10-28 23:55:37,097 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:55:37,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-28 23:55:37,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 88. [2021-10-28 23:55:37,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.367816091954023) internal successors, (119), 87 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:37,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 119 transitions. [2021-10-28 23:55:37,111 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 119 transitions. Word has length 21 [2021-10-28 23:55:37,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:55:37,112 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 119 transitions. [2021-10-28 23:55:37,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:37,113 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 119 transitions. [2021-10-28 23:55:37,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 23:55:37,114 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:55:37,114 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:37,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:37,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:37,339 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:55:37,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:37,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1399176113, now seen corresponding path program 2 times [2021-10-28 23:55:37,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:37,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834666184] [2021-10-28 23:55:37,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:37,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:37,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:37,445 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:37,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:37,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834666184] [2021-10-28 23:55:37,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834666184] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:37,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114581014] [2021-10-28 23:55:37,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:55:37,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:37,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:37,448 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:37,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 23:55:37,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:55:37,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:55:37,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 23:55:37,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 23:55:37,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114581014] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:37,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:55:37,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-10-28 23:55:37,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988445623] [2021-10-28 23:55:37,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:55:37,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:37,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:55:37,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:55:37,822 INFO L87 Difference]: Start difference. First operand 88 states and 119 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:38,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:38,162 INFO L93 Difference]: Finished difference Result 291 states and 407 transitions. [2021-10-28 23:55:38,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 23:55:38,163 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-28 23:55:38,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:55:38,165 INFO L225 Difference]: With dead ends: 291 [2021-10-28 23:55:38,165 INFO L226 Difference]: Without dead ends: 207 [2021-10-28 23:55:38,166 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-10-28 23:55:38,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-10-28 23:55:38,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 146. [2021-10-28 23:55:38,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.3655172413793104) internal successors, (198), 145 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) [2021-10-28 23:55:38,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 198 transitions. [2021-10-28 23:55:38,194 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 198 transitions. Word has length 24 [2021-10-28 23:55:38,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:55:38,195 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 198 transitions. [2021-10-28 23:55:38,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:38,195 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 198 transitions. [2021-10-28 23:55:38,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 23:55:38,197 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:55:38,197 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:38,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:38,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-28 23:55:38,415 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:55:38,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:38,416 INFO L85 PathProgramCache]: Analyzing trace with hash -2084547665, now seen corresponding path program 3 times [2021-10-28 23:55:38,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:38,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927447491] [2021-10-28 23:55:38,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:38,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:38,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:38,530 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:38,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:38,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927447491] [2021-10-28 23:55:38,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927447491] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:38,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918631526] [2021-10-28 23:55:38,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:55:38,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:38,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:38,543 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:38,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 23:55:38,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 23:55:38,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:55:38,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 23:55:38,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:38,766 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-28 23:55:38,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918631526] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:55:38,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:55:38,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2021-10-28 23:55:38,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129319314] [2021-10-28 23:55:38,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:55:38,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:38,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:55:38,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:55:38,770 INFO L87 Difference]: Start difference. First operand 146 states and 198 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) [2021-10-28 23:55:38,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:38,841 INFO L93 Difference]: Finished difference Result 334 states and 454 transitions. [2021-10-28 23:55:38,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:55:38,842 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 27 [2021-10-28 23:55:38,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:55:38,844 INFO L225 Difference]: With dead ends: 334 [2021-10-28 23:55:38,844 INFO L226 Difference]: Without dead ends: 192 [2021-10-28 23:55:38,849 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:55:38,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-10-28 23:55:38,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 164. [2021-10-28 23:55:38,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.2638036809815951) internal successors, (206), 163 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:38,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 206 transitions. [2021-10-28 23:55:38,890 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 206 transitions. Word has length 27 [2021-10-28 23:55:38,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:55:38,891 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 206 transitions. [2021-10-28 23:55:38,891 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) [2021-10-28 23:55:38,891 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 206 transitions. [2021-10-28 23:55:38,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 23:55:38,893 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:55:38,893 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:38,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:39,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:39,119 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:55:39,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:39,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1868779761, now seen corresponding path program 1 times [2021-10-28 23:55:39,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:39,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453029533] [2021-10-28 23:55:39,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:39,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:39,193 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-28 23:55:39,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:39,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453029533] [2021-10-28 23:55:39,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453029533] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:55:39,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:55:39,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:55:39,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135052262] [2021-10-28 23:55:39,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 23:55:39,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:39,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:55:39,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:55:39,204 INFO L87 Difference]: Start difference. First operand 164 states and 206 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:39,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:39,236 INFO L93 Difference]: Finished difference Result 344 states and 436 transitions. [2021-10-28 23:55:39,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:55:39,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 [2021-10-28 23:55:39,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:55:39,238 INFO L225 Difference]: With dead ends: 344 [2021-10-28 23:55:39,238 INFO L226 Difference]: Without dead ends: 184 [2021-10-28 23:55:39,239 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 [2021-10-28 23:55:39,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-10-28 23:55:39,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 162. [2021-10-28 23:55:39,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.2422360248447204) internal successors, (200), 161 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:39,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 200 transitions. [2021-10-28 23:55:39,276 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 200 transitions. Word has length 27 [2021-10-28 23:55:39,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:55:39,276 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 200 transitions. [2021-10-28 23:55:39,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:39,277 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 200 transitions. [2021-10-28 23:55:39,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 23:55:39,278 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:55:39,279 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:39,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 23:55:39,279 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:55:39,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:39,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1323368939, now seen corresponding path program 1 times [2021-10-28 23:55:39,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:39,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645600305] [2021-10-28 23:55:39,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:39,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:39,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:39,311 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-28 23:55:39,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:39,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645600305] [2021-10-28 23:55:39,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645600305] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:55:39,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:55:39,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:55:39,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991078756] [2021-10-28 23:55:39,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 23:55:39,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:39,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:55:39,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:55:39,314 INFO L87 Difference]: Start difference. First operand 162 states and 200 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2021-10-28 23:55:39,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:39,352 INFO L93 Difference]: Finished difference Result 256 states and 318 transitions. [2021-10-28 23:55:39,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:55:39,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 28 [2021-10-28 23:55:39,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:55:39,355 INFO L225 Difference]: With dead ends: 256 [2021-10-28 23:55:39,355 INFO L226 Difference]: Without dead ends: 176 [2021-10-28 23:55:39,356 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 [2021-10-28 23:55:39,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-10-28 23:55:39,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 166. [2021-10-28 23:55:39,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.2121212121212122) internal successors, (200), 165 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:39,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 200 transitions. [2021-10-28 23:55:39,376 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 200 transitions. Word has length 28 [2021-10-28 23:55:39,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:55:39,377 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 200 transitions. [2021-10-28 23:55:39,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2021-10-28 23:55:39,377 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 200 transitions. [2021-10-28 23:55:39,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 23:55:39,385 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:55:39,385 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:39,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 23:55:39,385 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:55:39,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:39,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1325275563, now seen corresponding path program 1 times [2021-10-28 23:55:39,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:39,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163505142] [2021-10-28 23:55:39,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:39,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:39,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:39,519 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:39,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:39,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163505142] [2021-10-28 23:55:39,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163505142] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:39,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737942983] [2021-10-28 23:55:39,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:39,520 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:39,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:39,523 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:39,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 23:55:39,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:39,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 23:55:39,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:39,934 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:39,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737942983] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:39,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:55:39,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-28 23:55:39,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919431793] [2021-10-28 23:55:39,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 23:55:39,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:39,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 23:55:39,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:55:39,939 INFO L87 Difference]: Start difference. First operand 166 states and 200 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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) [2021-10-28 23:55:40,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:40,051 INFO L93 Difference]: Finished difference Result 457 states and 547 transitions. [2021-10-28 23:55:40,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:55:40,052 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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 28 [2021-10-28 23:55:40,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:55:40,057 INFO L225 Difference]: With dead ends: 457 [2021-10-28 23:55:40,057 INFO L226 Difference]: Without dead ends: 295 [2021-10-28 23:55:40,058 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:55:40,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-10-28 23:55:40,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 196. [2021-10-28 23:55:40,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.2) internal successors, (234), 195 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:40,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 234 transitions. [2021-10-28 23:55:40,087 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 234 transitions. Word has length 28 [2021-10-28 23:55:40,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:55:40,088 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 234 transitions. [2021-10-28 23:55:40,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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) [2021-10-28 23:55:40,088 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 234 transitions. [2021-10-28 23:55:40,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 23:55:40,090 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:55:40,090 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:40,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:40,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-28 23:55:40,311 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:55:40,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:40,312 INFO L85 PathProgramCache]: Analyzing trace with hash 399501479, now seen corresponding path program 2 times [2021-10-28 23:55:40,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:40,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701437345] [2021-10-28 23:55:40,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:40,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:40,431 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:40,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:40,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701437345] [2021-10-28 23:55:40,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701437345] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:40,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029136056] [2021-10-28 23:55:40,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:55:40,437 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:40,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:40,443 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:40,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 23:55:40,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:55:40,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:55:40,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 23:55:40,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:40,939 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:40,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029136056] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:40,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:55:40,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-28 23:55:40,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871226511] [2021-10-28 23:55:40,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 23:55:40,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:40,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 23:55:40,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-10-28 23:55:40,943 INFO L87 Difference]: Start difference. First operand 196 states and 234 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-10-28 23:55:41,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:41,095 INFO L93 Difference]: Finished difference Result 517 states and 615 transitions. [2021-10-28 23:55:41,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:55:41,096 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 31 [2021-10-28 23:55:41,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:55:41,098 INFO L225 Difference]: With dead ends: 517 [2021-10-28 23:55:41,099 INFO L226 Difference]: Without dead ends: 325 [2021-10-28 23:55:41,100 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-10-28 23:55:41,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-10-28 23:55:41,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 226. [2021-10-28 23:55:41,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.191111111111111) internal successors, (268), 225 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:41,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 268 transitions. [2021-10-28 23:55:41,121 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 268 transitions. Word has length 31 [2021-10-28 23:55:41,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:55:41,122 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 268 transitions. [2021-10-28 23:55:41,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-10-28 23:55:41,122 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 268 transitions. [2021-10-28 23:55:41,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 23:55:41,123 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:55:41,124 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:41,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:41,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:41,343 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:55:41,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:41,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1351227349, now seen corresponding path program 3 times [2021-10-28 23:55:41,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:41,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773670523] [2021-10-28 23:55:41,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:41,344 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:41,467 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:41,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:41,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773670523] [2021-10-28 23:55:41,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773670523] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:41,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115082076] [2021-10-28 23:55:41,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:55:41,469 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:41,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:41,470 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:41,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 23:55:41,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 23:55:41,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:55:41,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 23:55:41,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:41,831 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-10-28 23:55:41,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115082076] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:55:41,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:55:41,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2021-10-28 23:55:41,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569277754] [2021-10-28 23:55:41,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:55:41,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:41,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:55:41,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:55:41,835 INFO L87 Difference]: Start difference. First operand 226 states and 268 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) [2021-10-28 23:55:41,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:41,924 INFO L93 Difference]: Finished difference Result 229 states and 270 transitions. [2021-10-28 23:55:41,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:55:41,924 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 34 [2021-10-28 23:55:41,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:55:41,926 INFO L225 Difference]: With dead ends: 229 [2021-10-28 23:55:41,927 INFO L226 Difference]: Without dead ends: 169 [2021-10-28 23:55:41,927 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:55:41,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-10-28 23:55:41,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2021-10-28 23:55:41,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.2035928143712575) internal successors, (201), 167 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:41,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 201 transitions. [2021-10-28 23:55:41,973 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 201 transitions. Word has length 34 [2021-10-28 23:55:41,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:55:41,973 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 201 transitions. [2021-10-28 23:55:41,974 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) [2021-10-28 23:55:41,974 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 201 transitions. [2021-10-28 23:55:41,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 23:55:41,975 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:55:41,975 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:42,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:42,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:42,193 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:55:42,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:42,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1860700439, now seen corresponding path program 1 times [2021-10-28 23:55:42,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:42,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93043568] [2021-10-28 23:55:42,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:42,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:42,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:42,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93043568] [2021-10-28 23:55:42,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93043568] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:42,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045747586] [2021-10-28 23:55:42,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:42,322 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:42,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:42,323 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:42,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 23:55:42,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:42,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 23:55:42,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:42,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045747586] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:42,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:55:42,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-28 23:55:42,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207033313] [2021-10-28 23:55:42,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 23:55:42,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:42,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 23:55:42,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:55:42,918 INFO L87 Difference]: Start difference. First operand 168 states and 201 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 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) [2021-10-28 23:55:43,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:43,072 INFO L93 Difference]: Finished difference Result 451 states and 537 transitions. [2021-10-28 23:55:43,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:55:43,073 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 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 34 [2021-10-28 23:55:43,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:55:43,075 INFO L225 Difference]: With dead ends: 451 [2021-10-28 23:55:43,076 INFO L226 Difference]: Without dead ends: 287 [2021-10-28 23:55:43,077 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:55:43,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-28 23:55:43,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 192. [2021-10-28 23:55:43,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.198952879581152) internal successors, (229), 191 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:43,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 229 transitions. [2021-10-28 23:55:43,097 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 229 transitions. Word has length 34 [2021-10-28 23:55:43,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:55:43,097 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 229 transitions. [2021-10-28 23:55:43,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 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) [2021-10-28 23:55:43,098 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 229 transitions. [2021-10-28 23:55:43,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-28 23:55:43,099 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:55:43,099 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:43,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:43,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:43,315 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:55:43,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:43,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1470700201, now seen corresponding path program 2 times [2021-10-28 23:55:43,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:43,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550982000] [2021-10-28 23:55:43,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:43,316 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:43,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:43,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550982000] [2021-10-28 23:55:43,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550982000] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:43,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123817339] [2021-10-28 23:55:43,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:55:43,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:43,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:43,454 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:43,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 23:55:43,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:55:43,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:55:43,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 23:55:43,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:44,056 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:44,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123817339] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:44,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:55:44,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-10-28 23:55:44,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756325007] [2021-10-28 23:55:44,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 23:55:44,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:44,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 23:55:44,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-10-28 23:55:44,060 INFO L87 Difference]: Start difference. First operand 192 states and 229 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 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) [2021-10-28 23:55:44,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:44,219 INFO L93 Difference]: Finished difference Result 499 states and 593 transitions. [2021-10-28 23:55:44,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:55:44,220 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 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 37 [2021-10-28 23:55:44,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:55:44,223 INFO L225 Difference]: With dead ends: 499 [2021-10-28 23:55:44,223 INFO L226 Difference]: Without dead ends: 311 [2021-10-28 23:55:44,224 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-10-28 23:55:44,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-10-28 23:55:44,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 216. [2021-10-28 23:55:44,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.1953488372093024) internal successors, (257), 215 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:44,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 257 transitions. [2021-10-28 23:55:44,246 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 257 transitions. Word has length 37 [2021-10-28 23:55:44,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:55:44,247 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 257 transitions. [2021-10-28 23:55:44,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 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) [2021-10-28 23:55:44,248 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 257 transitions. [2021-10-28 23:55:44,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 23:55:44,249 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:55:44,249 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:44,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:44,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 23:55:44,470 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:55:44,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:44,470 INFO L85 PathProgramCache]: Analyzing trace with hash -877109527, now seen corresponding path program 3 times [2021-10-28 23:55:44,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:44,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884833165] [2021-10-28 23:55:44,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:44,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:44,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:44,627 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:44,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:44,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884833165] [2021-10-28 23:55:44,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884833165] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:44,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382324637] [2021-10-28 23:55:44,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:55:44,628 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:44,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:44,631 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:44,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 23:55:44,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 23:55:44,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:55:44,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 23:55:44,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-10-28 23:55:45,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382324637] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:55:45,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:55:45,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 19 [2021-10-28 23:55:45,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410256578] [2021-10-28 23:55:45,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:55:45,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:45,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:55:45,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:55:45,302 INFO L87 Difference]: Start difference. First operand 216 states and 257 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:45,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:45,436 INFO L93 Difference]: Finished difference Result 496 states and 586 transitions. [2021-10-28 23:55:45,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:55:45,437 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-10-28 23:55:45,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:55:45,440 INFO L225 Difference]: With dead ends: 496 [2021-10-28 23:55:45,441 INFO L226 Difference]: Without dead ends: 494 [2021-10-28 23:55:45,441 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-10-28 23:55:45,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-10-28 23:55:45,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 306. [2021-10-28 23:55:45,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.1836065573770491) internal successors, (361), 305 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:45,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 361 transitions. [2021-10-28 23:55:45,489 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 361 transitions. Word has length 40 [2021-10-28 23:55:45,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:55:45,490 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 361 transitions. [2021-10-28 23:55:45,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:45,490 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 361 transitions. [2021-10-28 23:55:45,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 23:55:45,491 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:55:45,491 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:45,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:45,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 23:55:45,707 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:55:45,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:45,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1950517015, now seen corresponding path program 1 times [2021-10-28 23:55:45,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:45,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583471454] [2021-10-28 23:55:45,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:45,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:45,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:45,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:45,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583471454] [2021-10-28 23:55:45,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583471454] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:45,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893698694] [2021-10-28 23:55:45,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:45,859 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:45,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:45,860 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:45,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 23:55:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:46,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 23:55:46,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:46,493 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:46,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893698694] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:46,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:55:46,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-10-28 23:55:46,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389186101] [2021-10-28 23:55:46,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 23:55:46,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:46,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 23:55:46,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:55:46,506 INFO L87 Difference]: Start difference. First operand 306 states and 361 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 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) [2021-10-28 23:55:46,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:46,698 INFO L93 Difference]: Finished difference Result 669 states and 793 transitions. [2021-10-28 23:55:46,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 23:55:46,699 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 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 40 [2021-10-28 23:55:46,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:55:46,702 INFO L225 Difference]: With dead ends: 669 [2021-10-28 23:55:46,702 INFO L226 Difference]: Without dead ends: 439 [2021-10-28 23:55:46,704 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:55:46,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-10-28 23:55:46,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 339. [2021-10-28 23:55:46,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.180473372781065) internal successors, (399), 338 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:46,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 399 transitions. [2021-10-28 23:55:46,738 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 399 transitions. Word has length 40 [2021-10-28 23:55:46,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:55:46,739 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 399 transitions. [2021-10-28 23:55:46,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 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) [2021-10-28 23:55:46,740 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 399 transitions. [2021-10-28 23:55:46,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-28 23:55:46,740 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:55:46,741 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:46,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:46,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 23:55:46,967 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:55:46,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:46,967 INFO L85 PathProgramCache]: Analyzing trace with hash -658324379, now seen corresponding path program 2 times [2021-10-28 23:55:46,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:46,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504294862] [2021-10-28 23:55:46,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:46,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:46,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:47,167 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:47,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:47,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504294862] [2021-10-28 23:55:47,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504294862] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:47,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67353614] [2021-10-28 23:55:47,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:55:47,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:47,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:47,171 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:47,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 23:55:47,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:55:47,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:55:47,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 23:55:47,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-10-28 23:55:47,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67353614] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:47,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:55:47,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2021-10-28 23:55:47,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338644467] [2021-10-28 23:55:47,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 23:55:47,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:47,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 23:55:47,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=212, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:55:47,778 INFO L87 Difference]: Start difference. First operand 339 states and 399 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 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) [2021-10-28 23:55:48,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:48,332 INFO L93 Difference]: Finished difference Result 1075 states and 1251 transitions. [2021-10-28 23:55:48,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-28 23:55:48,333 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 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 43 [2021-10-28 23:55:48,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:55:48,338 INFO L225 Difference]: With dead ends: 1075 [2021-10-28 23:55:48,338 INFO L226 Difference]: Without dead ends: 821 [2021-10-28 23:55:48,340 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=486, Invalid=996, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 23:55:48,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-10-28 23:55:48,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 333. [2021-10-28 23:55:48,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.1686746987951808) internal successors, (388), 332 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:48,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 388 transitions. [2021-10-28 23:55:48,382 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 388 transitions. Word has length 43 [2021-10-28 23:55:48,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:55:48,382 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 388 transitions. [2021-10-28 23:55:48,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 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) [2021-10-28 23:55:48,383 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 388 transitions. [2021-10-28 23:55:48,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 23:55:48,384 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:55:48,384 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:48,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:48,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:48,597 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:55:48,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:48,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1311604647, now seen corresponding path program 3 times [2021-10-28 23:55:48,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:48,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604283860] [2021-10-28 23:55:48,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:48,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:48,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:48,800 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:48,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:48,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604283860] [2021-10-28 23:55:48,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604283860] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:48,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343133171] [2021-10-28 23:55:48,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:55:48,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:48,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:48,802 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:48,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 23:55:49,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 23:55:49,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:55:49,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 23:55:49,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:49,555 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-28 23:55:49,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343133171] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:55:49,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:55:49,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 21 [2021-10-28 23:55:49,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832781098] [2021-10-28 23:55:49,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:55:49,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:49,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:55:49,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-10-28 23:55:49,558 INFO L87 Difference]: Start difference. First operand 333 states and 388 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:49,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:49,747 INFO L93 Difference]: Finished difference Result 442 states and 513 transitions. [2021-10-28 23:55:49,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:55:49,748 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-10-28 23:55:49,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:55:49,751 INFO L225 Difference]: With dead ends: 442 [2021-10-28 23:55:49,751 INFO L226 Difference]: Without dead ends: 440 [2021-10-28 23:55:49,755 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:55:49,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-10-28 23:55:49,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 333. [2021-10-28 23:55:49,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.1686746987951808) internal successors, (388), 332 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:49,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 388 transitions. [2021-10-28 23:55:49,793 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 388 transitions. Word has length 46 [2021-10-28 23:55:49,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:55:49,793 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 388 transitions. [2021-10-28 23:55:49,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:49,794 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 388 transitions. [2021-10-28 23:55:49,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 23:55:49,795 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:55:49,795 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:49,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:50,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:50,019 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:55:50,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:50,020 INFO L85 PathProgramCache]: Analyzing trace with hash -53609623, now seen corresponding path program 1 times [2021-10-28 23:55:50,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:50,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109362348] [2021-10-28 23:55:50,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:50,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-10-28 23:55:50,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:50,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109362348] [2021-10-28 23:55:50,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109362348] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:55:50,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:55:50,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:55:50,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381660419] [2021-10-28 23:55:50,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:55:50,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:50,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:55:50,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:55:50,091 INFO L87 Difference]: Start difference. First operand 333 states and 388 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:50,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:50,185 INFO L93 Difference]: Finished difference Result 561 states and 655 transitions. [2021-10-28 23:55:50,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:55:50,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-10-28 23:55:50,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:55:50,190 INFO L225 Difference]: With dead ends: 561 [2021-10-28 23:55:50,190 INFO L226 Difference]: Without dead ends: 448 [2021-10-28 23:55:50,191 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:55:50,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-10-28 23:55:50,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 400. [2021-10-28 23:55:50,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.1754385964912282) internal successors, (469), 399 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:50,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 469 transitions. [2021-10-28 23:55:50,245 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 469 transitions. Word has length 46 [2021-10-28 23:55:50,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:55:50,245 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 469 transitions. [2021-10-28 23:55:50,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:50,246 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 469 transitions. [2021-10-28 23:55:50,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-10-28 23:55:50,247 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:55:50,248 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:50,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-28 23:55:50,248 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:55:50,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:50,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1284068705, now seen corresponding path program 1 times [2021-10-28 23:55:50,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:50,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398449308] [2021-10-28 23:55:50,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:50,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:50,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 387 proven. 176 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-10-28 23:55:50,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:50,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398449308] [2021-10-28 23:55:50,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398449308] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:50,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039729281] [2021-10-28 23:55:50,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:50,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:50,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:50,486 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:50,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 23:55:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:50,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 23:55:50,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:51,450 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 387 proven. 176 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-10-28 23:55:51,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039729281] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:51,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:55:51,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-10-28 23:55:51,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909402979] [2021-10-28 23:55:51,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 23:55:51,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:51,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 23:55:51,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2021-10-28 23:55:51,453 INFO L87 Difference]: Start difference. First operand 400 states and 469 transitions. Second operand has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:51,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:51,791 INFO L93 Difference]: Finished difference Result 1102 states and 1266 transitions. [2021-10-28 23:55:51,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 23:55:51,792 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-10-28 23:55:51,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:55:51,798 INFO L225 Difference]: With dead ends: 1102 [2021-10-28 23:55:51,798 INFO L226 Difference]: Without dead ends: 793 [2021-10-28 23:55:51,800 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2021-10-28 23:55:51,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-10-28 23:55:51,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 439. [2021-10-28 23:55:51,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.17351598173516) internal successors, (514), 438 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:51,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 514 transitions. [2021-10-28 23:55:51,860 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 514 transitions. Word has length 87 [2021-10-28 23:55:51,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:55:51,861 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 514 transitions. [2021-10-28 23:55:51,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:51,861 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 514 transitions. [2021-10-28 23:55:51,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-10-28 23:55:51,863 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:55:51,863 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:51,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:52,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:52,091 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:55:52,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:52,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1856213775, now seen corresponding path program 2 times [2021-10-28 23:55:52,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:52,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185096255] [2021-10-28 23:55:52,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:52,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 458 proven. 210 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-10-28 23:55:52,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:52,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185096255] [2021-10-28 23:55:52,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185096255] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:52,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489214510] [2021-10-28 23:55:52,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:55:52,292 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:52,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:52,293 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:52,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 23:55:52,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:55:52,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:55:52,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 23:55:52,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 458 proven. 210 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-10-28 23:55:53,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489214510] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:53,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:55:53,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-10-28 23:55:53,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987797322] [2021-10-28 23:55:53,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-28 23:55:53,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:53,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-28 23:55:53,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2021-10-28 23:55:53,255 INFO L87 Difference]: Start difference. First operand 439 states and 514 transitions. Second operand has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:53,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:53,543 INFO L93 Difference]: Finished difference Result 1171 states and 1346 transitions. [2021-10-28 23:55:53,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 23:55:53,544 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have 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 [2021-10-28 23:55:53,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:55:53,550 INFO L225 Difference]: With dead ends: 1171 [2021-10-28 23:55:53,550 INFO L226 Difference]: Without dead ends: 832 [2021-10-28 23:55:53,552 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2021-10-28 23:55:53,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-10-28 23:55:53,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 478. [2021-10-28 23:55:53,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 1.1719077568134173) internal successors, (559), 477 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:53,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 559 transitions. [2021-10-28 23:55:53,621 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 559 transitions. Word has length 93 [2021-10-28 23:55:53,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:55:53,621 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 559 transitions. [2021-10-28 23:55:53,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:53,622 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 559 transitions. [2021-10-28 23:55:53,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-28 23:55:53,624 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:55:53,624 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:53,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:53,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-28 23:55:53,851 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:55:53,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:53,851 INFO L85 PathProgramCache]: Analyzing trace with hash -267019423, now seen corresponding path program 3 times [2021-10-28 23:55:53,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:53,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718468456] [2021-10-28 23:55:53,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:53,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 535 proven. 247 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-10-28 23:55:54,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:54,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718468456] [2021-10-28 23:55:54,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718468456] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:54,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521525314] [2021-10-28 23:55:54,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:55:54,068 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:54,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:54,069 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:54,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 23:55:54,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 23:55:54,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:55:54,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 23:55:54,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 37 proven. 541 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2021-10-28 23:55:55,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521525314] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:55,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:55:55,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 24 [2021-10-28 23:55:55,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678127939] [2021-10-28 23:55:55,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-28 23:55:55,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:55,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-28 23:55:55,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-10-28 23:55:55,280 INFO L87 Difference]: Start difference. First operand 478 states and 559 transitions. Second operand has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:57,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:57,417 INFO L93 Difference]: Finished difference Result 2208 states and 2540 transitions. [2021-10-28 23:55:57,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-10-28 23:55:57,418 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-10-28 23:55:57,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:55:57,429 INFO L225 Difference]: With dead ends: 2208 [2021-10-28 23:55:57,429 INFO L226 Difference]: Without dead ends: 1839 [2021-10-28 23:55:57,434 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2190 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1574, Invalid=5908, Unknown=0, NotChecked=0, Total=7482 [2021-10-28 23:55:57,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2021-10-28 23:55:57,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 770. [2021-10-28 23:55:57,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 1.1716514954486346) internal successors, (901), 769 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:57,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 901 transitions. [2021-10-28 23:55:57,562 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 901 transitions. Word has length 99 [2021-10-28 23:55:57,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:55:57,562 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 901 transitions. [2021-10-28 23:55:57,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:57,563 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 901 transitions. [2021-10-28 23:55:57,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-28 23:55:57,566 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:55:57,566 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 24, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:57,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:57,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-28 23:55:57,779 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:55:57,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:57,780 INFO L85 PathProgramCache]: Analyzing trace with hash -111346257, now seen corresponding path program 1 times [2021-10-28 23:55:57,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:57,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881493683] [2021-10-28 23:55:57,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:57,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 49 proven. 861 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-10-28 23:55:58,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:58,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881493683] [2021-10-28 23:55:58,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881493683] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:58,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649720155] [2021-10-28 23:55:58,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:58,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:58,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:58,054 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:58,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 23:55:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:58,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 23:55:58,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:59,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 618 proven. 287 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2021-10-28 23:55:59,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649720155] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:59,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:55:59,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-10-28 23:55:59,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685655352] [2021-10-28 23:55:59,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-28 23:55:59,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:59,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-28 23:55:59,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 23:55:59,498 INFO L87 Difference]: Start difference. First operand 770 states and 901 transitions. Second operand has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:00,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:00,067 INFO L93 Difference]: Finished difference Result 1968 states and 2264 transitions. [2021-10-28 23:56:00,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 23:56:00,068 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-10-28 23:56:00,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:00,075 INFO L225 Difference]: With dead ends: 1968 [2021-10-28 23:56:00,076 INFO L226 Difference]: Without dead ends: 1316 [2021-10-28 23:56:00,077 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 23:56:00,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2021-10-28 23:56:00,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 809. [2021-10-28 23:56:00,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 1.1707920792079207) internal successors, (946), 808 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:00,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 946 transitions. [2021-10-28 23:56:00,214 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 946 transitions. Word has length 105 [2021-10-28 23:56:00,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:00,215 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 946 transitions. [2021-10-28 23:56:00,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:00,215 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 946 transitions. [2021-10-28 23:56:00,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-10-28 23:56:00,218 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:00,218 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 26, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:00,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 23:56:00,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 23:56:00,431 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:56:00,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:00,432 INFO L85 PathProgramCache]: Analyzing trace with hash 802849635, now seen corresponding path program 2 times [2021-10-28 23:56:00,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:00,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312170468] [2021-10-28 23:56:00,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:00,432 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:00,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:00,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 52 proven. 990 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-10-28 23:56:00,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:00,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312170468] [2021-10-28 23:56:00,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312170468] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:00,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111237444] [2021-10-28 23:56:00,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:56:00,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:56:00,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:56:00,718 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:56:00,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 23:56:01,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:56:01,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:56:01,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 23:56:01,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:56:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 707 proven. 330 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2021-10-28 23:56:02,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111237444] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:02,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:56:02,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-10-28 23:56:02,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596696383] [2021-10-28 23:56:02,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-28 23:56:02,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:02,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-28 23:56:02,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=715, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 23:56:02,244 INFO L87 Difference]: Start difference. First operand 809 states and 946 transitions. Second operand has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 34 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:02,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:02,920 INFO L93 Difference]: Finished difference Result 2078 states and 2393 transitions. [2021-10-28 23:56:02,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 23:56:02,921 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 34 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-10-28 23:56:02,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:02,930 INFO L225 Difference]: With dead ends: 2078 [2021-10-28 23:56:02,930 INFO L226 Difference]: Without dead ends: 1396 [2021-10-28 23:56:02,934 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=475, Invalid=715, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 23:56:02,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-10-28 23:56:03,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 866. [2021-10-28 23:56:03,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 1.169942196531792) internal successors, (1012), 865 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:03,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1012 transitions. [2021-10-28 23:56:03,112 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1012 transitions. Word has length 111 [2021-10-28 23:56:03,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:03,113 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1012 transitions. [2021-10-28 23:56:03,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 34 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:03,113 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1012 transitions. [2021-10-28 23:56:03,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-10-28 23:56:03,116 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:03,116 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 28, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:03,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 23:56:03,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-28 23:56:03,343 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:56:03,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:03,343 INFO L85 PathProgramCache]: Analyzing trace with hash -780287697, now seen corresponding path program 3 times [2021-10-28 23:56:03,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:03,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019637057] [2021-10-28 23:56:03,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:03,344 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:03,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 55 proven. 1128 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-10-28 23:56:03,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:03,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019637057] [2021-10-28 23:56:03,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019637057] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:03,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26236556] [2021-10-28 23:56:03,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:56:03,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:56:03,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:56:03,665 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:56:03,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 23:56:04,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 23:56:04,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:56:04,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 23:56:04,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:56:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 807 proven. 47 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2021-10-28 23:56:04,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26236556] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:04,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:56:04,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 25 [2021-10-28 23:56:04,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122768566] [2021-10-28 23:56:04,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-28 23:56:04,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:04,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-28 23:56:04,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-10-28 23:56:04,810 INFO L87 Difference]: Start difference. First operand 866 states and 1012 transitions. Second operand has 25 states, 25 states have (on average 3.96) internal successors, (99), 25 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) [2021-10-28 23:56:06,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:06,752 INFO L93 Difference]: Finished difference Result 2428 states and 2841 transitions. [2021-10-28 23:56:06,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-10-28 23:56:06,753 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.96) internal successors, (99), 25 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 117 [2021-10-28 23:56:06,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:06,762 INFO L225 Difference]: With dead ends: 2428 [2021-10-28 23:56:06,763 INFO L226 Difference]: Without dead ends: 1698 [2021-10-28 23:56:06,767 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1839 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1816, Invalid=4990, Unknown=0, NotChecked=0, Total=6806 [2021-10-28 23:56:06,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-10-28 23:56:06,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1132. [2021-10-28 23:56:06,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 1131 states have (on average 1.1520778072502211) internal successors, (1303), 1131 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:06,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 1303 transitions. [2021-10-28 23:56:06,968 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 1303 transitions. Word has length 117 [2021-10-28 23:56:06,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:06,969 INFO L470 AbstractCegarLoop]: Abstraction has 1132 states and 1303 transitions. [2021-10-28 23:56:06,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.96) internal successors, (99), 25 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) [2021-10-28 23:56:06,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 1303 transitions. [2021-10-28 23:56:06,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-10-28 23:56:06,972 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:06,972 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 20, 14, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:07,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 23:56:07,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-28 23:56:07,187 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:56:07,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:07,187 INFO L85 PathProgramCache]: Analyzing trace with hash 840591843, now seen corresponding path program 4 times [2021-10-28 23:56:07,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:07,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523060915] [2021-10-28 23:56:07,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:07,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:07,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 984 proven. 0 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2021-10-28 23:56:07,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:07,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523060915] [2021-10-28 23:56:07,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523060915] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:56:07,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:56:07,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:56:07,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985923824] [2021-10-28 23:56:07,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:56:07,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:07,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:56:07,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:56:07,267 INFO L87 Difference]: Start difference. First operand 1132 states and 1303 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:07,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:07,494 INFO L93 Difference]: Finished difference Result 1815 states and 2023 transitions. [2021-10-28 23:56:07,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:56:07,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-10-28 23:56:07,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:07,503 INFO L225 Difference]: With dead ends: 1815 [2021-10-28 23:56:07,503 INFO L226 Difference]: Without dead ends: 1604 [2021-10-28 23:56:07,503 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:56:07,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-10-28 23:56:07,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1150. [2021-10-28 23:56:07,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 1.154917319408181) internal successors, (1327), 1149 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:07,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1327 transitions. [2021-10-28 23:56:07,672 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1327 transitions. Word has length 123 [2021-10-28 23:56:07,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:07,673 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 1327 transitions. [2021-10-28 23:56:07,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:07,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1327 transitions. [2021-10-28 23:56:07,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-10-28 23:56:07,675 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:07,676 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 19, 15, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:07,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-10-28 23:56:07,676 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:56:07,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:07,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1273355935, now seen corresponding path program 5 times [2021-10-28 23:56:07,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:07,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119722222] [2021-10-28 23:56:07,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:07,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:07,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:08,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 903 proven. 425 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2021-10-28 23:56:08,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:08,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119722222] [2021-10-28 23:56:08,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119722222] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:08,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413265044] [2021-10-28 23:56:08,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:56:08,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:56:08,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:56:08,055 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:56:08,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 23:56:08,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-10-28 23:56:08,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:56:08,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-28 23:56:08,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:56:09,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 1159 proven. 338 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-10-28 23:56:09,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413265044] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:09,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:56:09,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 42 [2021-10-28 23:56:09,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867577462] [2021-10-28 23:56:09,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-10-28 23:56:09,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:09,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-10-28 23:56:09,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1341, Unknown=0, NotChecked=0, Total=1722 [2021-10-28 23:56:09,989 INFO L87 Difference]: Start difference. First operand 1150 states and 1327 transitions. Second operand has 42 states, 42 states have (on average 3.4761904761904763) internal successors, (146), 42 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) [2021-10-28 23:56:11,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:11,820 INFO L93 Difference]: Finished difference Result 2896 states and 3293 transitions. [2021-10-28 23:56:11,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-10-28 23:56:11,821 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.4761904761904763) internal successors, (146), 42 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 123 [2021-10-28 23:56:11,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:11,832 INFO L225 Difference]: With dead ends: 2896 [2021-10-28 23:56:11,833 INFO L226 Difference]: Without dead ends: 1893 [2021-10-28 23:56:11,839 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2477 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2087, Invalid=7033, Unknown=0, NotChecked=0, Total=9120 [2021-10-28 23:56:11,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2021-10-28 23:56:12,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 1123. [2021-10-28 23:56:12,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 1122 states have (on average 1.1452762923351159) internal successors, (1285), 1122 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:12,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1285 transitions. [2021-10-28 23:56:12,041 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1285 transitions. Word has length 123 [2021-10-28 23:56:12,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:12,042 INFO L470 AbstractCegarLoop]: Abstraction has 1123 states and 1285 transitions. [2021-10-28 23:56:12,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.4761904761904763) internal successors, (146), 42 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) [2021-10-28 23:56:12,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1285 transitions. [2021-10-28 23:56:12,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-10-28 23:56:12,045 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:12,045 INFO L513 BasicCegarLoop]: trace histogram [36, 36, 21, 15, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:12,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 23:56:12,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 23:56:12,271 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:56:12,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:12,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1151168365, now seen corresponding path program 6 times [2021-10-28 23:56:12,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:12,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910631605] [2021-10-28 23:56:12,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:12,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:12,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1970 backedges. 1010 proven. 477 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2021-10-28 23:56:12,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:12,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910631605] [2021-10-28 23:56:12,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910631605] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:12,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098550179] [2021-10-28 23:56:12,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:56:12,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:56:12,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:56:12,651 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:56:12,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 23:56:13,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-28 23:56:13,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:56:13,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 23:56:13,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:56:15,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1970 backedges. 228 proven. 1027 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-10-28 23:56:15,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098550179] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:15,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:56:15,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 29 [2021-10-28 23:56:15,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408812077] [2021-10-28 23:56:15,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-28 23:56:15,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:15,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-28 23:56:15,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-10-28 23:56:15,012 INFO L87 Difference]: Start difference. First operand 1123 states and 1285 transitions. Second operand has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 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) [2021-10-28 23:56:18,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:18,434 INFO L93 Difference]: Finished difference Result 2474 states and 2859 transitions. [2021-10-28 23:56:18,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-10-28 23:56:18,435 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 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) Word has length 129 [2021-10-28 23:56:18,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:18,441 INFO L225 Difference]: With dead ends: 2474 [2021-10-28 23:56:18,442 INFO L226 Difference]: Without dead ends: 1496 [2021-10-28 23:56:18,450 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5530 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3495, Invalid=13535, Unknown=0, NotChecked=0, Total=17030 [2021-10-28 23:56:18,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-10-28 23:56:18,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1254. [2021-10-28 23:56:18,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1253 states have (on average 1.1524341580207502) internal successors, (1444), 1253 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:18,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1444 transitions. [2021-10-28 23:56:18,616 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1444 transitions. Word has length 129 [2021-10-28 23:56:18,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:18,616 INFO L470 AbstractCegarLoop]: Abstraction has 1254 states and 1444 transitions. [2021-10-28 23:56:18,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 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) [2021-10-28 23:56:18,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1444 transitions. [2021-10-28 23:56:18,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-10-28 23:56:18,619 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:18,620 INFO L513 BasicCegarLoop]: trace histogram [39, 39, 37, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:18,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 23:56:18,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:56:18,831 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:56:18,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:18,831 INFO L85 PathProgramCache]: Analyzing trace with hash -2144366173, now seen corresponding path program 1 times [2021-10-28 23:56:18,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:18,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530791347] [2021-10-28 23:56:18,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:18,832 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:18,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:19,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2309 backedges. 1182 proven. 590 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-10-28 23:56:19,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:19,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530791347] [2021-10-28 23:56:19,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530791347] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:19,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341186272] [2021-10-28 23:56:19,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:19,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:56:19,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:56:19,239 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:56:19,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 23:56:20,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:20,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 23:56:20,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:56:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2309 backedges. 1181 proven. 590 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2021-10-28 23:56:21,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341186272] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:21,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:56:21,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-10-28 23:56:21,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117518583] [2021-10-28 23:56:21,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-10-28 23:56:21,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:21,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-10-28 23:56:21,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=1329, Unknown=0, NotChecked=0, Total=2070 [2021-10-28 23:56:21,034 INFO L87 Difference]: Start difference. First operand 1254 states and 1444 transitions. Second operand has 46 states, 46 states have (on average 3.108695652173913) internal successors, (143), 45 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:22,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:22,081 INFO L93 Difference]: Finished difference Result 2876 states and 3425 transitions. [2021-10-28 23:56:22,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-10-28 23:56:22,081 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.108695652173913) internal successors, (143), 45 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-10-28 23:56:22,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:22,089 INFO L225 Difference]: With dead ends: 2876 [2021-10-28 23:56:22,089 INFO L226 Difference]: Without dead ends: 1781 [2021-10-28 23:56:22,092 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1529 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1654, Invalid=3748, Unknown=0, NotChecked=0, Total=5402 [2021-10-28 23:56:22,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-10-28 23:56:22,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1496. [2021-10-28 23:56:22,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 1.1812709030100335) internal successors, (1766), 1495 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:22,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 1766 transitions. [2021-10-28 23:56:22,277 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 1766 transitions. Word has length 138 [2021-10-28 23:56:22,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:22,278 INFO L470 AbstractCegarLoop]: Abstraction has 1496 states and 1766 transitions. [2021-10-28 23:56:22,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.108695652173913) internal successors, (143), 45 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:22,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 1766 transitions. [2021-10-28 23:56:22,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-10-28 23:56:22,285 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:22,285 INFO L513 BasicCegarLoop]: trace histogram [42, 42, 40, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:22,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-28 23:56:22,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:56:22,511 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:56:22,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:22,511 INFO L85 PathProgramCache]: Analyzing trace with hash 297433953, now seen corresponding path program 2 times [2021-10-28 23:56:22,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:22,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660667991] [2021-10-28 23:56:22,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:22,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:22,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:22,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2675 backedges. 1368 proven. 651 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2021-10-28 23:56:22,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:22,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660667991] [2021-10-28 23:56:22,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660667991] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:22,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446022129] [2021-10-28 23:56:22,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:56:22,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:56:22,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:56:22,915 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:56:22,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-28 23:56:23,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:56:23,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:56:23,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-28 23:56:23,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:56:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2675 backedges. 6 proven. 1975 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2021-10-28 23:56:25,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446022129] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:25,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:56:25,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-10-28 23:56:25,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289521329] [2021-10-28 23:56:25,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-28 23:56:25,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:25,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-28 23:56:25,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=1561, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 23:56:25,158 INFO L87 Difference]: Start difference. First operand 1496 states and 1766 transitions. Second operand has 49 states, 49 states have (on average 3.2857142857142856) internal successors, (161), 48 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:25,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:25,968 INFO L93 Difference]: Finished difference Result 2748 states and 3281 transitions. [2021-10-28 23:56:25,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-10-28 23:56:25,969 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.2857142857142856) internal successors, (161), 48 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-10-28 23:56:25,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:25,978 INFO L225 Difference]: With dead ends: 2748 [2021-10-28 23:56:25,979 INFO L226 Difference]: Without dead ends: 1869 [2021-10-28 23:56:25,981 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1575, Invalid=3395, Unknown=0, NotChecked=0, Total=4970 [2021-10-28 23:56:25,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2021-10-28 23:56:26,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1506. [2021-10-28 23:56:26,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.1847176079734218) internal successors, (1783), 1505 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:26,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 1783 transitions. [2021-10-28 23:56:26,234 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 1783 transitions. Word has length 147 [2021-10-28 23:56:26,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:26,235 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 1783 transitions. [2021-10-28 23:56:26,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.2857142857142856) internal successors, (161), 48 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:26,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 1783 transitions. [2021-10-28 23:56:26,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-10-28 23:56:26,237 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:26,238 INFO L513 BasicCegarLoop]: trace histogram [42, 42, 42, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:26,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-28 23:56:26,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:56:26,451 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:56:26,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:26,451 INFO L85 PathProgramCache]: Analyzing trace with hash -758927133, now seen corresponding path program 1 times [2021-10-28 23:56:26,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:26,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504347988] [2021-10-28 23:56:26,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:26,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2675 backedges. 2 proven. 1371 refuted. 0 times theorem prover too weak. 1302 trivial. 0 not checked. [2021-10-28 23:56:26,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:26,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504347988] [2021-10-28 23:56:26,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504347988] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:26,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065474981] [2021-10-28 23:56:26,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:26,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:56:26,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:56:26,540 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:56:26,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-28 23:56:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:27,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 23:56:27,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:56:28,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2675 backedges. 1367 proven. 651 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2021-10-28 23:56:28,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065474981] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:28,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:56:28,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 24] total 27 [2021-10-28 23:56:28,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371436640] [2021-10-28 23:56:28,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-28 23:56:28,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:28,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-28 23:56:28,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=446, Unknown=0, NotChecked=0, Total=756 [2021-10-28 23:56:28,466 INFO L87 Difference]: Start difference. First operand 1506 states and 1783 transitions. Second operand has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:30,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:30,649 INFO L93 Difference]: Finished difference Result 3583 states and 4220 transitions. [2021-10-28 23:56:30,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-10-28 23:56:30,650 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-10-28 23:56:30,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:30,663 INFO L225 Difference]: With dead ends: 3583 [2021-10-28 23:56:30,663 INFO L226 Difference]: Without dead ends: 2342 [2021-10-28 23:56:30,666 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2346 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2973, Invalid=6147, Unknown=0, NotChecked=0, Total=9120 [2021-10-28 23:56:30,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2021-10-28 23:56:30,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 1721. [2021-10-28 23:56:30,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1720 states have (on average 1.1808139534883721) internal successors, (2031), 1720 states have internal predecessors, (2031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:30,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 2031 transitions. [2021-10-28 23:56:30,854 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 2031 transitions. Word has length 147 [2021-10-28 23:56:30,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:30,855 INFO L470 AbstractCegarLoop]: Abstraction has 1721 states and 2031 transitions. [2021-10-28 23:56:30,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:30,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 2031 transitions. [2021-10-28 23:56:30,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-10-28 23:56:30,858 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:30,859 INFO L513 BasicCegarLoop]: trace histogram [44, 44, 42, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:30,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-10-28 23:56:31,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-28 23:56:31,075 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:56:31,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:31,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1034830995, now seen corresponding path program 3 times [2021-10-28 23:56:31,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:31,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166180462] [2021-10-28 23:56:31,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:31,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:31,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2934 backedges. 1499 proven. 715 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2021-10-28 23:56:31,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:31,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166180462] [2021-10-28 23:56:31,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166180462] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:31,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243312566] [2021-10-28 23:56:31,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:56:31,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:56:31,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:56:31,468 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:56:31,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-28 23:56:32,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 23:56:32,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:56:32,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 23:56:32,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:56:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2934 backedges. 0 proven. 1504 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2021-10-28 23:56:34,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243312566] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:34,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:56:34,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 34 [2021-10-28 23:56:34,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489631799] [2021-10-28 23:56:34,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-28 23:56:34,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:34,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-28 23:56:34,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=823, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 23:56:34,051 INFO L87 Difference]: Start difference. First operand 1721 states and 2031 transitions. Second operand has 34 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 34 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:40,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:40,108 INFO L93 Difference]: Finished difference Result 3442 states and 4091 transitions. [2021-10-28 23:56:40,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-10-28 23:56:40,109 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 34 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-10-28 23:56:40,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:40,120 INFO L225 Difference]: With dead ends: 3442 [2021-10-28 23:56:40,120 INFO L226 Difference]: Without dead ends: 2356 [2021-10-28 23:56:40,126 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11383 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=5990, Invalid=26952, Unknown=0, NotChecked=0, Total=32942 [2021-10-28 23:56:40,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-10-28 23:56:40,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 1810. [2021-10-28 23:56:40,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1809 states have (on average 1.1774461028192371) internal successors, (2130), 1809 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:40,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 2130 transitions. [2021-10-28 23:56:40,337 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 2130 transitions. Word has length 153 [2021-10-28 23:56:40,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:40,337 INFO L470 AbstractCegarLoop]: Abstraction has 1810 states and 2130 transitions. [2021-10-28 23:56:40,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 34 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:40,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 2130 transitions. [2021-10-28 23:56:40,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-10-28 23:56:40,340 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:40,340 INFO L513 BasicCegarLoop]: trace histogram [45, 45, 44, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:40,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-28 23:56:40,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-28 23:56:40,541 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:56:40,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:40,541 INFO L85 PathProgramCache]: Analyzing trace with hash 882596709, now seen corresponding path program 1 times [2021-10-28 23:56:40,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:40,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999061562] [2021-10-28 23:56:40,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:40,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:40,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:40,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3068 backedges. 1565 proven. 715 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2021-10-28 23:56:40,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:40,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999061562] [2021-10-28 23:56:40,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999061562] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:40,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127088520] [2021-10-28 23:56:40,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:40,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:56:40,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:56:40,979 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:56:40,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-28 23:56:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:42,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-28 23:56:42,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:56:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3068 backedges. 1565 proven. 715 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2021-10-28 23:56:43,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127088520] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:43,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:56:43,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-10-28 23:56:43,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017565872] [2021-10-28 23:56:43,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-28 23:56:43,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:43,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-28 23:56:43,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=923, Invalid=1429, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 23:56:43,220 INFO L87 Difference]: Start difference. First operand 1810 states and 2130 transitions. Second operand has 49 states, 49 states have (on average 3.183673469387755) internal successors, (156), 48 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:43,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:43,574 INFO L93 Difference]: Finished difference Result 3392 states and 4017 transitions. [2021-10-28 23:56:43,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 23:56:43,575 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.183673469387755) internal successors, (156), 48 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-10-28 23:56:43,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:43,585 INFO L225 Difference]: With dead ends: 3392 [2021-10-28 23:56:43,586 INFO L226 Difference]: Without dead ends: 1936 [2021-10-28 23:56:43,588 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=923, Invalid=1429, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 23:56:43,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-10-28 23:56:43,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1869. [2021-10-28 23:56:43,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 1.1734475374732334) internal successors, (2192), 1868 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:43,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2192 transitions. [2021-10-28 23:56:43,838 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2192 transitions. Word has length 156 [2021-10-28 23:56:43,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:43,839 INFO L470 AbstractCegarLoop]: Abstraction has 1869 states and 2192 transitions. [2021-10-28 23:56:43,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.183673469387755) internal successors, (156), 48 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:43,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2192 transitions. [2021-10-28 23:56:43,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-10-28 23:56:43,841 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:43,842 INFO L513 BasicCegarLoop]: trace histogram [46, 46, 45, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:43,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-10-28 23:56:44,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-28 23:56:44,042 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:56:44,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:44,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1319566561, now seen corresponding path program 2 times [2021-10-28 23:56:44,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:44,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799699833] [2021-10-28 23:56:44,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:44,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:44,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3205 backedges. 1636 proven. 782 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2021-10-28 23:56:44,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:44,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799699833] [2021-10-28 23:56:44,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799699833] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:44,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447049643] [2021-10-28 23:56:44,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:56:44,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:56:44,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:56:44,553 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:56:44,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-28 23:56:45,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:56:45,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:56:45,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-28 23:56:45,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:56:46,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3205 backedges. 1635 proven. 782 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2021-10-28 23:56:46,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447049643] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:46,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:56:46,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 51 [2021-10-28 23:56:46,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498537730] [2021-10-28 23:56:46,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-28 23:56:46,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:46,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-28 23:56:46,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=954, Invalid=1698, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 23:56:46,947 INFO L87 Difference]: Start difference. First operand 1869 states and 2192 transitions. Second operand has 52 states, 52 states have (on average 3.1153846153846154) internal successors, (162), 51 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:48,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:48,246 INFO L93 Difference]: Finished difference Result 4186 states and 5017 transitions. [2021-10-28 23:56:48,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-10-28 23:56:48,248 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.1153846153846154) internal successors, (162), 51 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2021-10-28 23:56:48,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:48,281 INFO L225 Difference]: With dead ends: 4186 [2021-10-28 23:56:48,281 INFO L226 Difference]: Without dead ends: 2509 [2021-10-28 23:56:48,285 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1964 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2098, Invalid=4708, Unknown=0, NotChecked=0, Total=6806 [2021-10-28 23:56:48,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2021-10-28 23:56:48,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 1941. [2021-10-28 23:56:48,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 1.172680412371134) internal successors, (2275), 1940 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:48,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 2275 transitions. [2021-10-28 23:56:48,616 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 2275 transitions. Word has length 159 [2021-10-28 23:56:48,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:48,617 INFO L470 AbstractCegarLoop]: Abstraction has 1941 states and 2275 transitions. [2021-10-28 23:56:48,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.1153846153846154) internal successors, (162), 51 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:48,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 2275 transitions. [2021-10-28 23:56:48,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-10-28 23:56:48,620 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:48,621 INFO L513 BasicCegarLoop]: trace histogram [48, 48, 47, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:48,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-28 23:56:48,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-28 23:56:48,847 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:56:48,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:48,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1553693227, now seen corresponding path program 3 times [2021-10-28 23:56:48,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:48,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835295186] [2021-10-28 23:56:48,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:48,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:49,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3488 backedges. 1779 proven. 852 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2021-10-28 23:56:49,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:49,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835295186] [2021-10-28 23:56:49,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835295186] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:49,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360414017] [2021-10-28 23:56:49,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:56:49,428 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:56:49,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:56:49,435 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:56:49,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-28 23:56:50,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 23:56:50,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:56:50,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:56:50,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:56:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3488 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 3386 trivial. 0 not checked. [2021-10-28 23:56:51,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360414017] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:56:51,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:56:51,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [28] total 32 [2021-10-28 23:56:51,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630122460] [2021-10-28 23:56:51,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:56:51,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:51,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:56:51,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=653, Unknown=0, NotChecked=0, Total=992 [2021-10-28 23:56:51,312 INFO L87 Difference]: Start difference. First operand 1941 states and 2275 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:51,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:51,555 INFO L93 Difference]: Finished difference Result 2712 states and 3137 transitions. [2021-10-28 23:56:51,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:56:51,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-10-28 23:56:51,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:51,559 INFO L225 Difference]: With dead ends: 2712 [2021-10-28 23:56:51,560 INFO L226 Difference]: Without dead ends: 1328 [2021-10-28 23:56:51,562 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 23:56:51,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2021-10-28 23:56:51,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1178. [2021-10-28 23:56:51,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1177 states have (on average 1.1257434154630417) internal successors, (1325), 1177 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:51,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1325 transitions. [2021-10-28 23:56:51,742 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1325 transitions. Word has length 165 [2021-10-28 23:56:51,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:51,742 INFO L470 AbstractCegarLoop]: Abstraction has 1178 states and 1325 transitions. [2021-10-28 23:56:51,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:51,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1325 transitions. [2021-10-28 23:56:51,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-10-28 23:56:51,745 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:51,745 INFO L513 BasicCegarLoop]: trace histogram [48, 48, 47, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:51,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-10-28 23:56:51,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-28 23:56:51,959 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:56:51,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:51,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1555540269, now seen corresponding path program 7 times [2021-10-28 23:56:51,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:51,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336298404] [2021-10-28 23:56:51,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:51,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3488 backedges. 913 proven. 2575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:53,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:53,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336298404] [2021-10-28 23:56:53,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336298404] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:53,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405457938] [2021-10-28 23:56:53,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:56:53,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:56:53,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:56:53,167 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:56:53,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-28 23:56:54,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:54,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 23:56:54,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:56:56,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3488 backedges. 1778 proven. 852 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2021-10-28 23:56:56,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405457938] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:56,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:56:56,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 27] total 77 [2021-10-28 23:56:56,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163242616] [2021-10-28 23:56:56,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-10-28 23:56:56,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:56:56,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-10-28 23:56:56,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1329, Invalid=4523, Unknown=0, NotChecked=0, Total=5852 [2021-10-28 23:56:56,123 INFO L87 Difference]: Start difference. First operand 1178 states and 1325 transitions. Second operand has 77 states, 77 states have (on average 3.220779220779221) internal successors, (248), 77 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:58,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:56:58,167 INFO L93 Difference]: Finished difference Result 2412 states and 2752 transitions. [2021-10-28 23:56:58,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-10-28 23:56:58,168 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.220779220779221) internal successors, (248), 77 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-10-28 23:56:58,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:56:58,171 INFO L225 Difference]: With dead ends: 2412 [2021-10-28 23:56:58,171 INFO L226 Difference]: Without dead ends: 1441 [2021-10-28 23:56:58,173 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4685 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4308, Invalid=12204, Unknown=0, NotChecked=0, Total=16512 [2021-10-28 23:56:58,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2021-10-28 23:56:58,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 1211. [2021-10-28 23:56:58,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 1.1231404958677687) internal successors, (1359), 1210 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:58,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1359 transitions. [2021-10-28 23:56:58,341 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1359 transitions. Word has length 165 [2021-10-28 23:56:58,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:56:58,342 INFO L470 AbstractCegarLoop]: Abstraction has 1211 states and 1359 transitions. [2021-10-28 23:56:58,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.220779220779221) internal successors, (248), 77 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:56:58,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1359 transitions. [2021-10-28 23:56:58,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-10-28 23:56:58,345 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:56:58,345 INFO L513 BasicCegarLoop]: trace histogram [50, 50, 49, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:56:58,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-28 23:56:58,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-28 23:56:58,559 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:56:58,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:56:58,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1830883295, now seen corresponding path program 8 times [2021-10-28 23:56:58,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:56:58,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119999028] [2021-10-28 23:56:58,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:56:58,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:56:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:56:59,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 988 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:56:59,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:56:59,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119999028] [2021-10-28 23:56:59,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119999028] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:56:59,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986945254] [2021-10-28 23:56:59,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:56:59,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:56:59,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:56:59,783 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:56:59,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-28 23:57:01,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:57:01,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:01,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 23:57:01,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:02,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 1927 proven. 925 refuted. 0 times theorem prover too weak. 931 trivial. 0 not checked. [2021-10-28 23:57:02,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986945254] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:02,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:57:02,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 28] total 80 [2021-10-28 23:57:02,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751957560] [2021-10-28 23:57:02,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-10-28 23:57:02,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:02,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-10-28 23:57:02,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1434, Invalid=4886, Unknown=0, NotChecked=0, Total=6320 [2021-10-28 23:57:02,832 INFO L87 Difference]: Start difference. First operand 1211 states and 1359 transitions. Second operand has 80 states, 80 states have (on average 3.2125) internal successors, (257), 80 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:04,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:04,950 INFO L93 Difference]: Finished difference Result 2481 states and 2824 transitions. [2021-10-28 23:57:04,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-10-28 23:57:04,950 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.2125) internal successors, (257), 80 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2021-10-28 23:57:04,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:04,954 INFO L225 Difference]: With dead ends: 2481 [2021-10-28 23:57:04,954 INFO L226 Difference]: Without dead ends: 1486 [2021-10-28 23:57:04,958 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5068 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4649, Invalid=13173, Unknown=0, NotChecked=0, Total=17822 [2021-10-28 23:57:04,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2021-10-28 23:57:05,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1433. [2021-10-28 23:57:05,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 1.1410614525139664) internal successors, (1634), 1432 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:05,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 1634 transitions. [2021-10-28 23:57:05,153 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 1634 transitions. Word has length 171 [2021-10-28 23:57:05,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:05,153 INFO L470 AbstractCegarLoop]: Abstraction has 1433 states and 1634 transitions. [2021-10-28 23:57:05,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.2125) internal successors, (257), 80 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:05,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 1634 transitions. [2021-10-28 23:57:05,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-10-28 23:57:05,156 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:05,157 INFO L513 BasicCegarLoop]: trace histogram [52, 52, 51, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:05,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:05,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-28 23:57:05,362 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:05,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:05,362 INFO L85 PathProgramCache]: Analyzing trace with hash 505372205, now seen corresponding path program 9 times [2021-10-28 23:57:05,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:05,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107236039] [2021-10-28 23:57:05,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:05,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:06,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4090 backedges. 1066 proven. 3024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:06,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:06,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107236039] [2021-10-28 23:57:06,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107236039] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:06,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625400579] [2021-10-28 23:57:06,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:57:06,684 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:06,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:06,688 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:06,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-28 23:57:08,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 23:57:08,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:08,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 23:57:08,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:08,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4090 backedges. 2088 proven. 51 refuted. 0 times theorem prover too weak. 1951 trivial. 0 not checked. [2021-10-28 23:57:08,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625400579] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:08,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:57:08,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 7] total 60 [2021-10-28 23:57:08,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67246673] [2021-10-28 23:57:08,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-10-28 23:57:08,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:08,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-10-28 23:57:08,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=795, Invalid=2745, Unknown=0, NotChecked=0, Total=3540 [2021-10-28 23:57:08,880 INFO L87 Difference]: Start difference. First operand 1433 states and 1634 transitions. Second operand has 60 states, 60 states have (on average 3.2666666666666666) internal successors, (196), 60 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:20,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:20,848 INFO L93 Difference]: Finished difference Result 2528 states and 2889 transitions. [2021-10-28 23:57:20,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 319 states. [2021-10-28 23:57:20,849 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.2666666666666666) internal successors, (196), 60 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-10-28 23:57:20,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:20,852 INFO L225 Difference]: With dead ends: 2528 [2021-10-28 23:57:20,852 INFO L226 Difference]: Without dead ends: 1913 [2021-10-28 23:57:20,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 347 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47218 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=22272, Invalid=99180, Unknown=0, NotChecked=0, Total=121452 [2021-10-28 23:57:20,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-10-28 23:57:21,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1807. [2021-10-28 23:57:21,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1806 states have (on average 1.1450719822812847) internal successors, (2068), 1806 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:21,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 2068 transitions. [2021-10-28 23:57:21,036 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 2068 transitions. Word has length 177 [2021-10-28 23:57:21,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:21,037 INFO L470 AbstractCegarLoop]: Abstraction has 1807 states and 2068 transitions. [2021-10-28 23:57:21,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.2666666666666666) internal successors, (196), 60 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:21,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 2068 transitions. [2021-10-28 23:57:21,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-10-28 23:57:21,044 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:21,044 INFO L513 BasicCegarLoop]: trace histogram [78, 78, 75, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:21,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-10-28 23:57:21,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-28 23:57:21,271 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:21,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:21,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1331899705, now seen corresponding path program 4 times [2021-10-28 23:57:21,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:21,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664318576] [2021-10-28 23:57:21,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:21,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:21,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9267 backedges. 4164 proven. 1001 refuted. 0 times theorem prover too weak. 4102 trivial. 0 not checked. [2021-10-28 23:57:21,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:21,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664318576] [2021-10-28 23:57:21,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664318576] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:21,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660500792] [2021-10-28 23:57:21,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:57:21,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:21,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:21,903 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:21,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-28 23:57:23,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:57:23,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:23,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 74 conjunts are in the unsatisfiable core [2021-10-28 23:57:23,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:29,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9267 backedges. 925 proven. 7341 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2021-10-28 23:57:29,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660500792] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:29,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:57:29,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 62] total 90 [2021-10-28 23:57:29,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196309690] [2021-10-28 23:57:29,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-10-28 23:57:29,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:29,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-10-28 23:57:29,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1261, Invalid=6749, Unknown=0, NotChecked=0, Total=8010 [2021-10-28 23:57:29,485 INFO L87 Difference]: Start difference. First operand 1807 states and 2068 transitions. Second operand has 90 states, 90 states have (on average 3.1777777777777776) internal successors, (286), 90 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:34,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:34,683 INFO L93 Difference]: Finished difference Result 3488 states and 4035 transitions. [2021-10-28 23:57:34,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-10-28 23:57:34,683 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.1777777777777776) internal successors, (286), 90 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2021-10-28 23:57:34,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:34,687 INFO L225 Difference]: With dead ends: 3488 [2021-10-28 23:57:34,687 INFO L226 Difference]: Without dead ends: 2293 [2021-10-28 23:57:34,690 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13421 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=6210, Invalid=33590, Unknown=0, NotChecked=0, Total=39800 [2021-10-28 23:57:34,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2021-10-28 23:57:34,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 1662. [2021-10-28 23:57:34,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 1.1523178807947019) internal successors, (1914), 1661 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:34,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 1914 transitions. [2021-10-28 23:57:34,873 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 1914 transitions. Word has length 263 [2021-10-28 23:57:34,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:34,873 INFO L470 AbstractCegarLoop]: Abstraction has 1662 states and 1914 transitions. [2021-10-28 23:57:34,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.1777777777777776) internal successors, (286), 90 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:34,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 1914 transitions. [2021-10-28 23:57:34,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-10-28 23:57:34,879 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:34,879 INFO L513 BasicCegarLoop]: trace histogram [81, 81, 78, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:34,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:35,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:35,103 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:35,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:35,103 INFO L85 PathProgramCache]: Analyzing trace with hash -282690071, now seen corresponding path program 5 times [2021-10-28 23:57:35,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:35,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649325136] [2021-10-28 23:57:35,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:35,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:35,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9987 backedges. 4486 proven. 1080 refuted. 0 times theorem prover too weak. 4421 trivial. 0 not checked. [2021-10-28 23:57:35,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:35,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649325136] [2021-10-28 23:57:35,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649325136] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:35,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377530812] [2021-10-28 23:57:35,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:57:35,647 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:35,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:35,671 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:35,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-28 23:57:37,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 56 check-sat command(s) [2021-10-28 23:57:37,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:37,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 23:57:37,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:39,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9987 backedges. 4486 proven. 1080 refuted. 0 times theorem prover too weak. 4421 trivial. 0 not checked. [2021-10-28 23:57:39,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377530812] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:39,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:57:39,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2021-10-28 23:57:39,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987469278] [2021-10-28 23:57:39,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-10-28 23:57:39,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:39,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-10-28 23:57:39,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1333, Invalid=2089, Unknown=0, NotChecked=0, Total=3422 [2021-10-28 23:57:39,158 INFO L87 Difference]: Start difference. First operand 1662 states and 1914 transitions. Second operand has 59 states, 59 states have (on average 3.1186440677966103) internal successors, (184), 58 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:39,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:39,658 INFO L93 Difference]: Finished difference Result 3197 states and 3696 transitions. [2021-10-28 23:57:39,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-28 23:57:39,658 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.1186440677966103) internal successors, (184), 58 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 272 [2021-10-28 23:57:39,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:39,662 INFO L225 Difference]: With dead ends: 3197 [2021-10-28 23:57:39,662 INFO L226 Difference]: Without dead ends: 1782 [2021-10-28 23:57:39,664 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1333, Invalid=2089, Unknown=0, NotChecked=0, Total=3422 [2021-10-28 23:57:39,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2021-10-28 23:57:39,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1725. [2021-10-28 23:57:39,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1724 states have (on average 1.148491879350348) internal successors, (1980), 1724 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:39,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 1980 transitions. [2021-10-28 23:57:39,843 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 1980 transitions. Word has length 272 [2021-10-28 23:57:39,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:39,844 INFO L470 AbstractCegarLoop]: Abstraction has 1725 states and 1980 transitions. [2021-10-28 23:57:39,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.1186440677966103) internal successors, (184), 58 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:39,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 1980 transitions. [2021-10-28 23:57:39,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-10-28 23:57:39,851 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:57:39,851 INFO L513 BasicCegarLoop]: trace histogram [84, 84, 81, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:39,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:40,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:40,067 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:57:40,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:40,067 INFO L85 PathProgramCache]: Analyzing trace with hash -407080135, now seen corresponding path program 6 times [2021-10-28 23:57:40,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:40,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656081563] [2021-10-28 23:57:40,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:40,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:40,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10734 backedges. 4820 proven. 1162 refuted. 0 times theorem prover too weak. 4752 trivial. 0 not checked. [2021-10-28 23:57:40,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:40,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656081563] [2021-10-28 23:57:40,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656081563] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:40,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109562692] [2021-10-28 23:57:40,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:57:40,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:40,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:40,716 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:40,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-28 23:57:42,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-28 23:57:42,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:42,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 23:57:42,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10734 backedges. 4914 proven. 1 refuted. 0 times theorem prover too weak. 5819 trivial. 0 not checked. [2021-10-28 23:57:43,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109562692] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:43,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:57:43,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 8] total 38 [2021-10-28 23:57:43,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504528617] [2021-10-28 23:57:43,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-28 23:57:43,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:43,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-28 23:57:43,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=921, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 23:57:43,600 INFO L87 Difference]: Start difference. First operand 1725 states and 1980 transitions. Second operand has 38 states, 38 states have (on average 3.6052631578947367) internal successors, (137), 38 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:46,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:57:46,390 INFO L93 Difference]: Finished difference Result 3341 states and 3870 transitions. [2021-10-28 23:57:46,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-10-28 23:57:46,391 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.6052631578947367) internal successors, (137), 38 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 281 [2021-10-28 23:57:46,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:57:46,391 INFO L225 Difference]: With dead ends: 3341 [2021-10-28 23:57:46,391 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 23:57:46,395 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2189 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3231, Invalid=7071, Unknown=0, NotChecked=0, Total=10302 [2021-10-28 23:57:46,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 23:57:46,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 23:57:46,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:46,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 23:57:46,396 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 281 [2021-10-28 23:57:46,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:57:46,396 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 23:57:46,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.6052631578947367) internal successors, (137), 38 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:46,397 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 23:57:46,397 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 23:57:46,400 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:57:46,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:46,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-10-28 23:57:46,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-28 23:57:46,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 23:59:12,662 WARN L207 SmtUtils]: Spent 1.43 m on a formula simplification. DAG size of input: 5989 DAG size of output: 3713 [2021-10-28 23:59:12,696 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 23:59:12,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 00:02:11,528 WARN L207 SmtUtils]: Spent 2.97 m on a formula simplification. DAG size of input: 3366 DAG size of output: 301 [2021-10-29 00:02:12,128 INFO L857 garLoopResultBuilder]: For program point L27-2(lines 27 29) no Hoare annotation was computed. [2021-10-29 00:02:12,130 INFO L853 garLoopResultBuilder]: At program point L27-3(lines 27 29) the Hoare annotation is: (let ((.cse13 (+ ~last~0 1)) (.cse14 (<= (+ ULTIMATE.start_main_~d~0 199998) ~SIZE~0)) (.cse15 (<= (+ ~last~0 199978) ~SIZE~0)) (.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse2 (= ULTIMATE.start_main_~d~0 0)) (.cse3 (< 0 ~last~0)) (.cse5 (= ULTIMATE.start_main_~st~0 1))) (let ((.cse11 (<= ULTIMATE.start_main_~c~0 21)) (.cse20 (<= ULTIMATE.start_main_~c~0 10)) (.cse21 (<= ~last~0 23)) (.cse22 (= ULTIMATE.start_main_~c~0 0)) (.cse16 (<= ULTIMATE.start_main_~c~0 7)) (.cse28 (<= ULTIMATE.start_main_~c~0 13)) (.cse4 (<= ULTIMATE.start_main_~c~0 1)) (.cse23 (<= 3 ULTIMATE.start_main_~c~0)) (.cse24 (<= ULTIMATE.start_main_~c~0 3)) (.cse17 (<= ULTIMATE.start_main_~c~0 5)) (.cse26 (<= ULTIMATE.start_main_~c~0 12)) (.cse25 (<= ULTIMATE.start_main_~c~0 19)) (.cse27 (<= ULTIMATE.start_main_~c~0 20)) (.cse7 (or (and .cse0 .cse14 .cse15 .cse3 .cse5) (and .cse0 .cse2 .cse3 .cse5))) (.cse8 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse9 (< ULTIMATE.start_main_~c~0 .cse13)) (.cse12 (< ULTIMATE.start_main_~c~0 (+ ~SIZE~0 1))) (.cse1 (= ULTIMATE.start_main_~b~0 0)) (.cse18 (<= .cse13 ULTIMATE.start_main_~c~0)) (.cse19 (= ULTIMATE.start_main_~st~0 0)) (.cse10 (<= 200000 ~SIZE~0)) (.cse6 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~a~0))) (or (and .cse0 .cse1 (<= 1 ULTIMATE.start_main_~c~0) .cse2 .cse3 .cse4 .cse5 .cse6 (<= (+ ULTIMATE.start_main_~c~0 199999) ~SIZE~0)) (and (<= ULTIMATE.start_main_~c~0 14) .cse7 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 9)) .cse8 .cse9 .cse10 .cse6) (and .cse0 .cse1 (<= 21 ULTIMATE.start_main_~c~0) .cse2 .cse9 .cse11 .cse5 .cse10 .cse6) (and (<= ~last~0 (+ ULTIMATE.start_main_~c~0 2)) .cse7 .cse8 .cse9 .cse11 .cse10 .cse6) (and .cse12 .cse0 .cse8 (< ~SIZE~0 .cse13) .cse2 .cse5 .cse10 .cse6) (and .cse0 .cse14 .cse8 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 16)) .cse15 .cse9 .cse3 .cse16 .cse5 .cse10 .cse6) (and .cse0 (<= 5 ULTIMATE.start_main_~c~0) .cse1 .cse17 .cse2 .cse9 .cse5 .cse10 .cse6) (and .cse12 .cse0 .cse8 .cse18 .cse2 .cse19 .cse3 .cse10 .cse6) (and (<= ULTIMATE.start_main_~c~0 4) .cse0 .cse14 (<= ~last~0 (+ 19 ULTIMATE.start_main_~c~0)) .cse8 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse1 .cse2 .cse9 (<= (+ ULTIMATE.start_main_~c~0 199994) ~SIZE~0) (<= 6 ULTIMATE.start_main_~c~0) .cse5 .cse6) (and .cse0 (<= ULTIMATE.start_main_~c~0 15) .cse14 .cse8 .cse15 .cse9 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 8)) .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse14 .cse8 .cse15 .cse9 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 13)) .cse3 .cse5 .cse10 .cse6 .cse20) (and (<= ULTIMATE.start_main_~c~0 2) .cse0 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 21)) .cse14 .cse8 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and (<= 24 ULTIMATE.start_main_~c~0) .cse0 .cse1 .cse2 .cse9 (<= ULTIMATE.start_main_~c~0 24) .cse5 .cse10 .cse6) (and .cse0 .cse14 .cse8 .cse15 .cse3 .cse21 .cse5 .cse10 .cse6 .cse22) (and .cse12 .cse0 .cse1 .cse2 .cse9 (<= 25 ULTIMATE.start_main_~c~0) .cse5 .cse10 .cse6) (and .cse0 .cse1 (<= (+ ULTIMATE.start_main_~c~0 199991) ~SIZE~0) .cse2 .cse9 .cse5 .cse6 (<= 9 ULTIMATE.start_main_~c~0)) (and .cse0 .cse14 (<= ~last~0 ULTIMATE.start_main_~c~0) .cse8 (<= ULTIMATE.start_main_~c~0 23) .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse1 (<= (+ ULTIMATE.start_main_~c~0 199978) ~SIZE~0) .cse2 .cse9 (<= 22 ULTIMATE.start_main_~c~0) .cse5 .cse6) (and .cse0 .cse1 (<= 10 ULTIMATE.start_main_~c~0) .cse2 .cse9 .cse5 .cse10 .cse6 .cse20) (and .cse12 .cse0 .cse14 .cse8 .cse18 .cse15 .cse19 .cse3 .cse21 .cse10 .cse6) (and .cse0 .cse1 .cse2 .cse9 (<= 16 ULTIMATE.start_main_~c~0) .cse5 .cse6 (<= (+ 199984 ULTIMATE.start_main_~c~0) ~SIZE~0)) (and .cse23 .cse0 .cse1 .cse24 .cse2 .cse9 .cse5 .cse10 .cse6) (and .cse0 .cse1 (<= (+ ULTIMATE.start_main_~c~0 199986) ~SIZE~0) (<= 14 ULTIMATE.start_main_~c~0) .cse2 .cse9 .cse5 .cse6) (and .cse0 .cse14 .cse8 .cse25 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 4))) (and .cse0 .cse1 (<= 23 ULTIMATE.start_main_~c~0) (<= (+ ULTIMATE.start_main_~c~0 199977) ~SIZE~0) .cse2 .cse9 .cse5 .cse6) (and .cse0 .cse1 .cse2 .cse3 .cse5 .cse10 .cse6 .cse22) (and .cse0 .cse1 (<= 12 ULTIMATE.start_main_~c~0) .cse2 .cse9 .cse26 .cse5 .cse10 .cse6) (and (<= 7 ULTIMATE.start_main_~c~0) .cse0 .cse1 .cse2 .cse9 .cse16 .cse5 .cse10 .cse6) (and .cse0 .cse1 (<= 18 ULTIMATE.start_main_~c~0) .cse2 .cse9 (<= (+ ULTIMATE.start_main_~c~0 199982) ~SIZE~0) .cse5 .cse6) (and .cse0 (<= ULTIMATE.start_main_~c~0 8) .cse14 .cse8 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 15)) .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse1 (<= 11 ULTIMATE.start_main_~c~0) .cse2 .cse9 (<= (+ ULTIMATE.start_main_~c~0 199989) ~SIZE~0) .cse5 .cse6) (and .cse0 .cse1 .cse2 .cse9 .cse27 .cse5 .cse10 (<= 20 ULTIMATE.start_main_~c~0) .cse6) (and .cse0 (<= ULTIMATE.start_main_~c~0 17) .cse14 .cse8 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 6))) (and .cse0 .cse14 .cse8 .cse28 .cse15 .cse9 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 10)) .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse1 (<= 13 ULTIMATE.start_main_~c~0) .cse28 .cse2 .cse9 .cse5 .cse10 .cse6) (and .cse0 (< ULTIMATE.start_main_~c~0 ~SIZE~0) .cse8 .cse2 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse14 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 22)) .cse8 .cse15 .cse3 .cse4 .cse5 .cse10 .cse6) (and (<= ULTIMATE.start_main_~c~0 18) .cse0 .cse14 .cse8 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 5)) .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse1 .cse2 .cse9 .cse5 .cse6 (<= (+ ULTIMATE.start_main_~c~0 199992) ~SIZE~0) (<= 8 ULTIMATE.start_main_~c~0)) (and .cse0 (<= ULTIMATE.start_main_~c~0 9) .cse14 .cse8 .cse15 .cse9 .cse3 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 14)) .cse5 .cse10 .cse6) (and (<= ULTIMATE.start_main_~c~0 11) .cse0 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 12)) .cse14 .cse8 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and (<= ~last~0 (+ ULTIMATE.start_main_~c~0 20)) .cse0 .cse24 .cse14 .cse8 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse23 .cse0 (<= ~last~0 3) .cse24 .cse14 .cse8 .cse3 .cse5 .cse10 .cse6) (and (<= ~last~0 (+ ULTIMATE.start_main_~c~0 18)) .cse0 .cse14 .cse17 .cse8 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse14 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 17)) .cse8 (<= ULTIMATE.start_main_~c~0 6) .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse1 (<= (+ ULTIMATE.start_main_~c~0 199983) ~SIZE~0) (<= 17 ULTIMATE.start_main_~c~0) .cse2 .cse9 .cse5 .cse6) (and .cse0 .cse1 .cse2 .cse9 (<= 2 ULTIMATE.start_main_~c~0) (<= (+ ULTIMATE.start_main_~c~0 199998) ~SIZE~0) .cse5 .cse6) (and (<= (+ 199996 ULTIMATE.start_main_~c~0) ~SIZE~0) .cse0 .cse1 .cse2 .cse9 .cse5 .cse6 (<= 4 ULTIMATE.start_main_~c~0)) (and .cse0 .cse1 (<= 15 ULTIMATE.start_main_~c~0) .cse2 .cse9 (<= (+ ULTIMATE.start_main_~c~0 199985) ~SIZE~0) .cse5 .cse6) (and .cse7 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 11)) .cse8 .cse9 .cse26 .cse10 .cse6) (and .cse0 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 1)) (<= ULTIMATE.start_main_~c~0 22) .cse14 .cse8 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse1 .cse2 .cse25 .cse9 (<= 19 ULTIMATE.start_main_~c~0) .cse5 .cse10 .cse6) (and .cse0 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 3)) .cse14 .cse8 .cse15 .cse9 .cse27 .cse3 .cse5 .cse10 .cse6) (and (<= ~last~0 (+ ULTIMATE.start_main_~c~0 7)) (<= ULTIMATE.start_main_~c~0 16) .cse7 .cse8 .cse9 .cse10 .cse6) (and .cse12 .cse0 .cse1 .cse18 .cse2 .cse19 .cse3 .cse10 .cse6)))) [2021-10-29 00:02:12,130 INFO L857 garLoopResultBuilder]: For program point L27-4(lines 25 45) no Hoare annotation was computed. [2021-10-29 00:02:12,131 INFO L857 garLoopResultBuilder]: For program point L11(lines 11 13) no Hoare annotation was computed. [2021-10-29 00:02:12,131 INFO L853 garLoopResultBuilder]: At program point L11-2(lines 10 45) the Hoare annotation is: (let ((.cse0 (< ULTIMATE.start_main_~c~0 (+ ~SIZE~0 1))) (.cse1 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse2 (<= ~SIZE~0 ULTIMATE.start_main_~c~0)) (.cse3 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse7 (= ULTIMATE.start_main_~d~0 0)) (.cse4 (< 0 ~last~0)) (.cse5 (<= 200000 ~SIZE~0)) (.cse6 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~a~0))) (or (and .cse0 .cse1 .cse2 (<= (+ ULTIMATE.start_main_~d~0 199998) ~SIZE~0) .cse3 (<= (+ ~last~0 199978) ~SIZE~0) .cse4 (<= ~last~0 23) .cse5 .cse6) (and .cse1 (= ULTIMATE.start_main_~b~0 0) .cse7 .cse4 .cse5 .cse6 (= ULTIMATE.start_main_~c~0 0)) (and .cse0 .cse1 .cse2 .cse3 .cse7 .cse4 .cse5 .cse6))) [2021-10-29 00:02:12,131 INFO L857 garLoopResultBuilder]: For program point L36(lines 36 38) no Hoare annotation was computed. [2021-10-29 00:02:12,131 INFO L857 garLoopResultBuilder]: For program point L36-2(lines 25 45) no Hoare annotation was computed. [2021-10-29 00:02:12,131 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-29 00:02:12,132 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-29 00:02:12,132 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-29 00:02:12,132 INFO L857 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2021-10-29 00:02:12,132 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-10-29 00:02:12,132 INFO L857 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2021-10-29 00:02:12,132 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-29 00:02:12,132 INFO L857 garLoopResultBuilder]: For program point L25-2(lines 25 45) no Hoare annotation was computed. [2021-10-29 00:02:12,132 INFO L853 garLoopResultBuilder]: At program point L46(lines 20 47) the Hoare annotation is: false [2021-10-29 00:02:12,132 INFO L857 garLoopResultBuilder]: For program point L5(lines 5 7) no Hoare annotation was computed. [2021-10-29 00:02:12,133 INFO L857 garLoopResultBuilder]: For program point L30-1(lines 25 45) no Hoare annotation was computed. [2021-10-29 00:02:12,133 INFO L857 garLoopResultBuilder]: For program point L6(line 6) no Hoare annotation was computed. [2021-10-29 00:02:12,133 INFO L857 garLoopResultBuilder]: For program point L39-1(lines 39 42) no Hoare annotation was computed. [2021-10-29 00:02:12,136 INFO L731 BasicCegarLoop]: Path program histogram: [9, 6, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 00:02:12,138 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 00:02:12,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 12:02:12 BoogieIcfgContainer [2021-10-29 00:02:12,214 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 00:02:12,214 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 00:02:12,215 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 00:02:12,215 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 00:02:12,216 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:55:33" (3/4) ... [2021-10-29 00:02:12,219 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-29 00:02:12,232 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-29 00:02:12,233 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-29 00:02:12,233 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-29 00:02:12,233 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-29 00:02:12,286 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-29 00:02:12,287 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 00:02:12,288 INFO L168 Benchmark]: Toolchain (without parser) took 399359.71 ms. Allocated memory was 111.1 MB in the beginning and 5.1 GB in the end (delta: 5.0 GB). Free memory was 80.0 MB in the beginning and 3.2 GB in the end (delta: -3.1 GB). Peak memory consumption was 1.9 GB. Max. memory is 16.1 GB. [2021-10-29 00:02:12,289 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 75.5 MB. Free memory was 35.3 MB in the beginning and 35.2 MB in the end (delta: 42.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 00:02:12,289 INFO L168 Benchmark]: CACSL2BoogieTranslator took 419.35 ms. Allocated memory is still 111.1 MB. Free memory was 79.8 MB in the beginning and 87.2 MB in the end (delta: -7.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-29 00:02:12,290 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.97 ms. Allocated memory is still 111.1 MB. Free memory was 87.2 MB in the beginning and 85.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 00:02:12,290 INFO L168 Benchmark]: Boogie Preprocessor took 40.44 ms. Allocated memory is still 111.1 MB. Free memory was 85.7 MB in the beginning and 84.7 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 00:02:12,290 INFO L168 Benchmark]: RCFGBuilder took 365.30 ms. Allocated memory is still 111.1 MB. Free memory was 84.7 MB in the beginning and 74.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-29 00:02:12,291 INFO L168 Benchmark]: TraceAbstraction took 398385.27 ms. Allocated memory was 111.1 MB in the beginning and 5.1 GB in the end (delta: 5.0 GB). Free memory was 74.3 MB in the beginning and 3.2 GB in the end (delta: -3.1 GB). Peak memory consumption was 3.0 GB. Max. memory is 16.1 GB. [2021-10-29 00:02:12,292 INFO L168 Benchmark]: Witness Printer took 72.54 ms. Allocated memory is still 5.1 GB. Free memory was 3.2 GB in the beginning and 3.2 GB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-29 00:02:12,294 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 75.5 MB. Free memory was 35.3 MB in the beginning and 35.2 MB in the end (delta: 42.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 419.35 ms. Allocated memory is still 111.1 MB. Free memory was 79.8 MB in the beginning and 87.2 MB in the end (delta: -7.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 55.97 ms. Allocated memory is still 111.1 MB. Free memory was 87.2 MB in the beginning and 85.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.44 ms. Allocated memory is still 111.1 MB. Free memory was 85.7 MB in the beginning and 84.7 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 365.30 ms. Allocated memory is still 111.1 MB. Free memory was 84.7 MB in the beginning and 74.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 398385.27 ms. Allocated memory was 111.1 MB in the beginning and 5.1 GB in the end (delta: 5.0 GB). Free memory was 74.3 MB in the beginning and 3.2 GB in the end (delta: -3.1 GB). Peak memory consumption was 3.0 GB. Max. memory is 16.1 GB. * Witness Printer took 72.54 ms. Allocated memory is still 5.1 GB. Free memory was 3.2 GB in the beginning and 3.2 GB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 398.2s, OverallIterations: 43, TraceHistogramMax: 84, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.1s, AutomataDifference: 51.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 265.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 600 SDtfs, 10075 SDslu, 1217 SDs, 0 SdLazy, 11151 SolverSat, 2479 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5567 GetRequests, 3280 SyntacticMatches, 0 SemanticMatches, 2287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108761 ImplicationChecksByTransitivity, 51.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1941occurred in iteration=36, InterpolantAutomatonStates: 1668, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 4.3s AutomataMinimizationTime, 43 MinimizatonAttempts, 10035 StatesRemovedByMinimization, 41 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 646 NumberOfFragments, 2105 HoareAnnotationTreeSize, 3 FomulaSimplifications, 63740626284713 FormulaSimplificationTreeSizeReduction, 86.5s HoareSimplificationTime, 3 FomulaSimplificationsInter, 12598421229953 FormulaSimplificationTreeSizeReductionInter, 178.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 42.4s InterpolantComputationTime, 7670 NumberOfCodeBlocks, 6667 NumberOfCodeBlocksAsserted, 181 NumberOfCheckSat, 7592 ConstructedInterpolants, 0 QuantifiedInterpolants, 29362 SizeOfPredicates, 120 NumberOfNonLiveVariables, 6478 ConjunctsInSsa, 582 ConjunctsInUnsatCore, 78 InterpolantComputations, 13 PerfectInterpolantSequences, 105695/148357 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((cond == 1 && b == 0) && 1 <= c) && d == 0) && 0 < last) && c <= 1) && st == 1) && b == a) && c + 199999 <= SIZE) || ((((((c <= 14 && (((((cond == 1 && d + 199998 <= SIZE) && last + 199978 <= SIZE) && 0 < last) && st == 1) || (((cond == 1 && d == 0) && 0 < last) && st == 1))) && last <= c + 9) && 1 == cond) && c < last + 1) && 200000 <= SIZE) && b == a)) || ((((((((cond == 1 && b == 0) && 21 <= c) && d == 0) && c < last + 1) && c <= 21) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((last <= c + 2 && (((((cond == 1 && d + 199998 <= SIZE) && last + 199978 <= SIZE) && 0 < last) && st == 1) || (((cond == 1 && d == 0) && 0 < last) && st == 1))) && 1 == cond) && c < last + 1) && c <= 21) && 200000 <= SIZE) && b == a)) || (((((((c < SIZE + 1 && cond == 1) && 1 == cond) && SIZE < last + 1) && d == 0) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((cond == 1 && d + 199998 <= SIZE) && 1 == cond) && last <= c + 16) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && c <= 7) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((cond == 1 && 5 <= c) && b == 0) && c <= 5) && d == 0) && c < last + 1) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((c < SIZE + 1 && cond == 1) && 1 == cond) && last + 1 <= c) && d == 0) && st == 0) && 0 < last) && 200000 <= SIZE) && b == a)) || ((((((((((c <= 4 && cond == 1) && d + 199998 <= SIZE) && last <= 19 + c) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && d == 0) && c < last + 1) && c + 199994 <= SIZE) && 6 <= c) && st == 1) && b == a)) || ((((((((((cond == 1 && c <= 15) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && last <= c + 8) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((cond == 1 && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && last <= c + 13) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a) && c <= 10)) || ((((((((((c <= 2 && cond == 1) && last <= c + 21) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((24 <= c && cond == 1) && b == 0) && d == 0) && c < last + 1) && c <= 24) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((((cond == 1 && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && 0 < last) && last <= 23) && st == 1) && 200000 <= SIZE) && b == a) && c == 0)) || ((((((((c < SIZE + 1 && cond == 1) && b == 0) && d == 0) && c < last + 1) && 25 <= c) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && c + 199991 <= SIZE) && d == 0) && c < last + 1) && st == 1) && b == a) && 9 <= c)) || ((((((((((cond == 1 && d + 199998 <= SIZE) && last <= c) && 1 == cond) && c <= 23) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && c + 199978 <= SIZE) && d == 0) && c < last + 1) && 22 <= c) && st == 1) && b == a)) || ((((((((cond == 1 && b == 0) && 10 <= c) && d == 0) && c < last + 1) && st == 1) && 200000 <= SIZE) && b == a) && c <= 10)) || ((((((((((c < SIZE + 1 && cond == 1) && d + 199998 <= SIZE) && 1 == cond) && last + 1 <= c) && last + 199978 <= SIZE) && st == 0) && 0 < last) && last <= 23) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && d == 0) && c < last + 1) && 16 <= c) && st == 1) && b == a) && 199984 + c <= SIZE)) || ((((((((3 <= c && cond == 1) && b == 0) && c <= 3) && d == 0) && c < last + 1) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && c + 199986 <= SIZE) && 14 <= c) && d == 0) && c < last + 1) && st == 1) && b == a)) || ((((((((((cond == 1 && d + 199998 <= SIZE) && 1 == cond) && c <= 19) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a) && last <= c + 4)) || (((((((cond == 1 && b == 0) && 23 <= c) && c + 199977 <= SIZE) && d == 0) && c < last + 1) && st == 1) && b == a)) || (((((((cond == 1 && b == 0) && d == 0) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a) && c == 0)) || ((((((((cond == 1 && b == 0) && 12 <= c) && d == 0) && c < last + 1) && c <= 12) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((7 <= c && cond == 1) && b == 0) && d == 0) && c < last + 1) && c <= 7) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && 18 <= c) && d == 0) && c < last + 1) && c + 199982 <= SIZE) && st == 1) && b == a)) || ((((((((((cond == 1 && c <= 8) && d + 199998 <= SIZE) && 1 == cond) && last <= c + 15) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && 11 <= c) && d == 0) && c < last + 1) && c + 199989 <= SIZE) && st == 1) && b == a)) || ((((((((cond == 1 && b == 0) && d == 0) && c < last + 1) && c <= 20) && st == 1) && 200000 <= SIZE) && 20 <= c) && b == a)) || ((((((((((cond == 1 && c <= 17) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a) && last <= c + 6)) || ((((((((((cond == 1 && d + 199998 <= SIZE) && 1 == cond) && c <= 13) && last + 199978 <= SIZE) && c < last + 1) && last <= c + 10) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((cond == 1 && b == 0) && 13 <= c) && c <= 13) && d == 0) && c < last + 1) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((cond == 1 && c < SIZE) && 1 == cond) && d == 0) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((((cond == 1 && d + 199998 <= SIZE) && last <= c + 22) && 1 == cond) && last + 199978 <= SIZE) && 0 < last) && c <= 1) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((c <= 18 && cond == 1) && d + 199998 <= SIZE) && 1 == cond) && last <= c + 5) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && d == 0) && c < last + 1) && st == 1) && b == a) && c + 199992 <= SIZE) && 8 <= c)) || ((((((((((cond == 1 && c <= 9) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && last <= c + 14) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((c <= 11 && cond == 1) && last <= c + 12) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((last <= c + 20 && cond == 1) && c <= 3) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((((3 <= c && cond == 1) && last <= 3) && c <= 3) && d + 199998 <= SIZE) && 1 == cond) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((last <= c + 18 && cond == 1) && d + 199998 <= SIZE) && c <= 5) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((cond == 1 && d + 199998 <= SIZE) && last <= c + 17) && 1 == cond) && c <= 6) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && c + 199983 <= SIZE) && 17 <= c) && d == 0) && c < last + 1) && st == 1) && b == a)) || (((((((cond == 1 && b == 0) && d == 0) && c < last + 1) && 2 <= c) && c + 199998 <= SIZE) && st == 1) && b == a)) || (((((((199996 + c <= SIZE && cond == 1) && b == 0) && d == 0) && c < last + 1) && st == 1) && b == a) && 4 <= c)) || (((((((cond == 1 && b == 0) && 15 <= c) && d == 0) && c < last + 1) && c + 199985 <= SIZE) && st == 1) && b == a)) || (((((((((((cond == 1 && d + 199998 <= SIZE) && last + 199978 <= SIZE) && 0 < last) && st == 1) || (((cond == 1 && d == 0) && 0 < last) && st == 1)) && last <= c + 11) && 1 == cond) && c < last + 1) && c <= 12) && 200000 <= SIZE) && b == a)) || ((((((((((cond == 1 && last <= c + 1) && c <= 22) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((cond == 1 && b == 0) && d == 0) && c <= 19) && c < last + 1) && 19 <= c) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((cond == 1 && last <= c + 3) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && c <= 20) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((last <= c + 7 && c <= 16) && (((((cond == 1 && d + 199998 <= SIZE) && last + 199978 <= SIZE) && 0 < last) && st == 1) || (((cond == 1 && d == 0) && 0 < last) && st == 1))) && 1 == cond) && c < last + 1) && 200000 <= SIZE) && b == a)) || ((((((((c < SIZE + 1 && cond == 1) && b == 0) && last + 1 <= c) && d == 0) && st == 0) && 0 < last) && 200000 <= SIZE) && b == a) - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: ((((((((((c < SIZE + 1 && cond == 1) && SIZE <= c) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && 0 < last) && last <= 23) && 200000 <= SIZE) && b == a) || ((((((cond == 1 && b == 0) && d == 0) && 0 < last) && 200000 <= SIZE) && b == a) && c == 0)) || (((((((c < SIZE + 1 && cond == 1) && SIZE <= c) && 1 == cond) && d == 0) && 0 < last) && 200000 <= SIZE) && b == a) RESULT: Ultimate proved your program to be correct! [2021-10-29 00:02:12,547 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-29 00:02:12,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e05ca00-6e14-423d-b51a-57070dcf8e83/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...