./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-industry-pattern/nested-3.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_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-industry-pattern/nested-3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg --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 13e5ee77a02e52d8ba8ae9f3698472ae34be00d2574eddc823f2c8e804568236 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 09:47:43,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:47:43,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:47:43,690 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:47:43,691 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:47:43,692 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:47:43,694 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:47:43,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:47:43,699 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:47:43,700 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:47:43,701 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:47:43,702 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:47:43,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:47:43,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:47:43,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:47:43,707 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:47:43,708 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:47:43,709 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:47:43,711 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:47:43,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:47:43,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:47:43,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:47:43,719 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:47:43,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:47:43,724 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:47:43,724 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:47:43,725 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:47:43,726 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:47:43,727 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:47:43,728 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:47:43,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:47:43,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:47:43,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:47:43,731 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:47:43,733 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:47:43,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:47:43,734 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:47:43,734 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:47:43,735 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:47:43,736 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:47:43,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:47:43,742 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 09:47:43,789 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:47:43,789 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:47:43,790 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:47:43,790 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:47:43,797 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:47:43,797 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:47:43,797 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:47:43,798 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:47:43,798 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:47:43,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:47:43,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:47:43,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:47:43,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 09:47:43,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:47:43,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 09:47:43,799 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:47:43,800 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 09:47:43,800 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:47:43,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 09:47:43,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:47:43,800 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:47:43,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:47:43,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:47:43,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:47:43,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:47:43,802 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 09:47:43,802 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:47:43,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:47:43,802 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 09:47:43,802 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 09:47:43,803 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 09:47:43,803 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:47:43,803 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_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13e5ee77a02e52d8ba8ae9f3698472ae34be00d2574eddc823f2c8e804568236 [2021-10-28 09:47:44,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:47:44,092 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:47:44,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:47:44,096 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:47:44,096 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:47:44,097 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/loop-industry-pattern/nested-3.c [2021-10-28 09:47:44,169 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/data/39c7c787e/b434dfdde0ed4b0aaa6c82d69d642b7f/FLAG91c37ce36 [2021-10-28 09:47:44,709 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:47:44,711 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/sv-benchmarks/c/loop-industry-pattern/nested-3.c [2021-10-28 09:47:44,717 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/data/39c7c787e/b434dfdde0ed4b0aaa6c82d69d642b7f/FLAG91c37ce36 [2021-10-28 09:47:45,097 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/data/39c7c787e/b434dfdde0ed4b0aaa6c82d69d642b7f [2021-10-28 09:47:45,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:47:45,101 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 09:47:45,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:47:45,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:47:45,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:47:45,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:47:45" (1/1) ... [2021-10-28 09:47:45,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e7345ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:47:45, skipping insertion in model container [2021-10-28 09:47:45,108 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:47:45" (1/1) ... [2021-10-28 09:47:45,115 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:47:45,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:47:45,290 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_a4982be6-6ece-490c-a134-6b5eb28db573/sv-benchmarks/c/loop-industry-pattern/nested-3.c[404,417] [2021-10-28 09:47:45,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:47:45,315 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:47:45,325 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_a4982be6-6ece-490c-a134-6b5eb28db573/sv-benchmarks/c/loop-industry-pattern/nested-3.c[404,417] [2021-10-28 09:47:45,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:47:45,342 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:47:45,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:47:45 WrapperNode [2021-10-28 09:47:45,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:47:45,343 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 09:47:45,344 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 09:47:45,344 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 09:47:45,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:47:45" (1/1) ... [2021-10-28 09:47:45,356 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:47:45" (1/1) ... [2021-10-28 09:47:45,373 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 09:47:45,374 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:47:45,374 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:47:45,374 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:47:45,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:47:45" (1/1) ... [2021-10-28 09:47:45,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:47:45" (1/1) ... [2021-10-28 09:47:45,383 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:47:45" (1/1) ... [2021-10-28 09:47:45,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:47:45" (1/1) ... [2021-10-28 09:47:45,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:47:45" (1/1) ... [2021-10-28 09:47:45,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:47:45" (1/1) ... [2021-10-28 09:47:45,392 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:47:45" (1/1) ... [2021-10-28 09:47:45,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:47:45,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:47:45,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:47:45,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:47:45,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:47:45" (1/1) ... [2021-10-28 09:47:45,403 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:47:45,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:45,447 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:47:45,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:47:45,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:47:45,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:47:45,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 09:47:45,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:47:45,760 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:47:45,765 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-28 09:47:45,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:47:45 BoogieIcfgContainer [2021-10-28 09:47:45,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:47:45,769 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:47:45,769 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:47:45,773 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:47:45,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:47:45" (1/3) ... [2021-10-28 09:47:45,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74d785ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:47:45, skipping insertion in model container [2021-10-28 09:47:45,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:47:45" (2/3) ... [2021-10-28 09:47:45,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74d785ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:47:45, skipping insertion in model container [2021-10-28 09:47:45,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:47:45" (3/3) ... [2021-10-28 09:47:45,776 INFO L111 eAbstractionObserver]: Analyzing ICFG nested-3.c [2021-10-28 09:47:45,782 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:47:45,783 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 09:47:45,844 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:47:45,853 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 09:47:45,853 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 09:47:45,869 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 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 09:47:45,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-28 09:47:45,874 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:45,875 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:47:45,876 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:45,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:45,894 INFO L85 PathProgramCache]: Analyzing trace with hash 684167869, now seen corresponding path program 1 times [2021-10-28 09:47:45,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:45,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955518405] [2021-10-28 09:47:45,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:45,912 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:46,187 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 09:47:46,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:46,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955518405] [2021-10-28 09:47:46,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955518405] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:47:46,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:47:46,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:47:46,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440230684] [2021-10-28 09:47:46,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:47:46,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:46,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:47:46,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:47:46,223 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:46,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:46,298 INFO L93 Difference]: Finished difference Result 29 states and 49 transitions. [2021-10-28 09:47:46,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:47:46,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-28 09:47:46,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:46,307 INFO L225 Difference]: With dead ends: 29 [2021-10-28 09:47:46,307 INFO L226 Difference]: Without dead ends: 16 [2021-10-28 09:47:46,312 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:47:46,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-28 09:47:46,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2021-10-28 09:47:46,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:46,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2021-10-28 09:47:46,343 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 9 [2021-10-28 09:47:46,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:46,345 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2021-10-28 09:47:46,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:46,345 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2021-10-28 09:47:46,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 09:47:46,346 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:46,346 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:47:46,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:47:46,347 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:46,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:46,350 INFO L85 PathProgramCache]: Analyzing trace with hash 68919620, now seen corresponding path program 1 times [2021-10-28 09:47:46,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:46,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831293217] [2021-10-28 09:47:46,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:46,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:46,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:46,439 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 09:47:46,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:46,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831293217] [2021-10-28 09:47:46,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831293217] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:46,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969827877] [2021-10-28 09:47:46,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:46,441 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:46,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:46,446 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:46,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 09:47:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:46,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 09:47:46,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:47:46,543 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 09:47:46,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969827877] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:47:46,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:47:46,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-28 09:47:46,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219733593] [2021-10-28 09:47:46,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:47:46,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:46,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:47:46,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:47:46,547 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 3 states, 3 states have (on average 4.0) 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 09:47:46,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:46,582 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2021-10-28 09:47:46,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:47:46,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) 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 09:47:46,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:46,583 INFO L225 Difference]: With dead ends: 30 [2021-10-28 09:47:46,583 INFO L226 Difference]: Without dead ends: 19 [2021-10-28 09:47:46,584 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:47:46,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-28 09:47:46,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2021-10-28 09:47:46,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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 09:47:46,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2021-10-28 09:47:46,588 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 12 [2021-10-28 09:47:46,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:46,588 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2021-10-28 09:47:46,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) 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 09:47:46,589 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2021-10-28 09:47:46,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 09:47:46,590 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:46,590 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:47:46,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-28 09:47:46,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:46,817 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:46,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:46,818 INFO L85 PathProgramCache]: Analyzing trace with hash 68979202, now seen corresponding path program 1 times [2021-10-28 09:47:46,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:46,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757093046] [2021-10-28 09:47:46,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:46,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:46,872 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 09:47:46,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:46,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757093046] [2021-10-28 09:47:46,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757093046] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:46,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456929547] [2021-10-28 09:47:46,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:46,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:46,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:46,876 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:46,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 09:47:46,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:46,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 09:47:46,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:47:47,012 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 09:47:47,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456929547] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:47,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:47:47,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-28 09:47:47,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936451571] [2021-10-28 09:47:47,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:47:47,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:47,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:47:47,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:47:47,026 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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 09:47:47,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:47,076 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2021-10-28 09:47:47,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:47:47,077 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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 12 [2021-10-28 09:47:47,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:47,079 INFO L225 Difference]: With dead ends: 32 [2021-10-28 09:47:47,079 INFO L226 Difference]: Without dead ends: 20 [2021-10-28 09:47:47,080 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 09:47:47,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-28 09:47:47,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-10-28 09:47:47,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 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 09:47:47,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-10-28 09:47:47,090 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 12 [2021-10-28 09:47:47,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:47,090 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-10-28 09:47:47,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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 09:47:47,091 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2021-10-28 09:47:47,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 09:47:47,091 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:47,092 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:47:47,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:47:47,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:47,321 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:47,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:47,321 INFO L85 PathProgramCache]: Analyzing trace with hash 2128812571, now seen corresponding path program 2 times [2021-10-28 09:47:47,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:47,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068507526] [2021-10-28 09:47:47,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:47,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:47,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:47,403 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 09:47:47,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:47,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068507526] [2021-10-28 09:47:47,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068507526] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:47,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437239438] [2021-10-28 09:47:47,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:47:47,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:47,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:47,409 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:47,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 09:47:47,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:47:47,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:47:47,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:47:47,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:47:47,562 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 09:47:47,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437239438] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:47,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:47:47,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-28 09:47:47,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351982843] [2021-10-28 09:47:47,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:47:47,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:47,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:47:47,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:47:47,565 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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 09:47:47,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:47,679 INFO L93 Difference]: Finished difference Result 59 states and 81 transitions. [2021-10-28 09:47:47,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:47:47,679 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-28 09:47:47,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:47,682 INFO L225 Difference]: With dead ends: 59 [2021-10-28 09:47:47,682 INFO L226 Difference]: Without dead ends: 44 [2021-10-28 09:47:47,685 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:47:47,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-28 09:47:47,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2021-10-28 09:47:47,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:47,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-10-28 09:47:47,697 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 15 [2021-10-28 09:47:47,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:47,697 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-10-28 09:47:47,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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 09:47:47,698 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-10-28 09:47:47,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 09:47:47,699 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:47,699 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:47:47,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 09:47:47,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:47,913 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:47,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:47,913 INFO L85 PathProgramCache]: Analyzing trace with hash 25548196, now seen corresponding path program 1 times [2021-10-28 09:47:47,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:47,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925605020] [2021-10-28 09:47:47,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:47,914 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:47,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:47,965 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 09:47:47,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:47,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925605020] [2021-10-28 09:47:47,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925605020] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:47,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266863279] [2021-10-28 09:47:47,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:47,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:47,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:47,967 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:47,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 09:47:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:48,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 09:47:48,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:47:48,116 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 09:47:48,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266863279] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:48,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:47:48,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-28 09:47:48,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803147067] [2021-10-28 09:47:48,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:47:48,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:48,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:47:48,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:47:48,120 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 09:47:48,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:48,178 INFO L93 Difference]: Finished difference Result 94 states and 125 transitions. [2021-10-28 09:47:48,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:47:48,178 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) Word has length 18 [2021-10-28 09:47:48,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:48,179 INFO L225 Difference]: With dead ends: 94 [2021-10-28 09:47:48,179 INFO L226 Difference]: Without dead ends: 61 [2021-10-28 09:47:48,180 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:47:48,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-28 09:47:48,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 41. [2021-10-28 09:47:48,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:48,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 54 transitions. [2021-10-28 09:47:48,186 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 54 transitions. Word has length 18 [2021-10-28 09:47:48,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:48,187 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 54 transitions. [2021-10-28 09:47:48,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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 09:47:48,187 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 54 transitions. [2021-10-28 09:47:48,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:47:48,188 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:48,188 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:47:48,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 09:47:48,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:48,417 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:48,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:48,417 INFO L85 PathProgramCache]: Analyzing trace with hash 2073833213, now seen corresponding path program 2 times [2021-10-28 09:47:48,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:48,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123633269] [2021-10-28 09:47:48,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:48,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:48,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:48,502 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 09:47:48,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:48,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123633269] [2021-10-28 09:47:48,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123633269] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:48,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176492463] [2021-10-28 09:47:48,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:47:48,503 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:48,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:48,517 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:48,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 09:47:48,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:47:48,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:47:48,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 09:47:48,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:47:48,673 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 09:47:48,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176492463] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:47:48,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:47:48,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-10-28 09:47:48,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653030853] [2021-10-28 09:47:48,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:47:48,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:48,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:47:48,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:47:48,676 INFO L87 Difference]: Start difference. First operand 41 states and 54 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:48,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:48,721 INFO L93 Difference]: Finished difference Result 119 states and 155 transitions. [2021-10-28 09:47:48,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:47:48,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-28 09:47:48,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:48,726 INFO L225 Difference]: With dead ends: 119 [2021-10-28 09:47:48,726 INFO L226 Difference]: Without dead ends: 80 [2021-10-28 09:47:48,727 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:47:48,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-28 09:47:48,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 61. [2021-10-28 09:47:48,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 60 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:48,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2021-10-28 09:47:48,746 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 21 [2021-10-28 09:47:48,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:48,747 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2021-10-28 09:47:48,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:48,747 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2021-10-28 09:47:48,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:47:48,748 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:48,748 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:47:48,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 09:47:48,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:48,965 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:48,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:48,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1062715963, now seen corresponding path program 3 times [2021-10-28 09:47:48,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:48,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137079071] [2021-10-28 09:47:48,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:48,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:48,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:49,032 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 09:47:49,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:49,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137079071] [2021-10-28 09:47:49,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137079071] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:49,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799713235] [2021-10-28 09:47:49,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:47:49,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:49,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:49,035 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:49,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 09:47:49,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 09:47:49,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:47:49,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 09:47:49,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:47:49,464 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-28 09:47:49,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799713235] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:47:49,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:47:49,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-10-28 09:47:49,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484914156] [2021-10-28 09:47:49,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:47:49,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:49,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:47:49,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:47:49,466 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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 09:47:49,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:49,561 INFO L93 Difference]: Finished difference Result 161 states and 203 transitions. [2021-10-28 09:47:49,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:47:49,565 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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 21 [2021-10-28 09:47:49,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:49,568 INFO L225 Difference]: With dead ends: 161 [2021-10-28 09:47:49,568 INFO L226 Difference]: Without dead ends: 159 [2021-10-28 09:47:49,568 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-10-28 09:47:49,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-10-28 09:47:49,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 104. [2021-10-28 09:47:49,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.2621359223300972) internal successors, (130), 103 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:49,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2021-10-28 09:47:49,580 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 21 [2021-10-28 09:47:49,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:49,584 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2021-10-28 09:47:49,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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 09:47:49,584 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2021-10-28 09:47:49,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:47:49,596 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:49,596 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:47:49,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 09:47:49,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-28 09:47:49,800 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:49,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:49,801 INFO L85 PathProgramCache]: Analyzing trace with hash 483638269, now seen corresponding path program 1 times [2021-10-28 09:47:49,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:49,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40816179] [2021-10-28 09:47:49,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:49,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:49,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:49,875 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 09:47:49,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:49,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40816179] [2021-10-28 09:47:49,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40816179] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:49,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853048406] [2021-10-28 09:47:49,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:49,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:49,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:49,882 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:49,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 09:47:49,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:49,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 09:47:49,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:47:50,033 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 09:47:50,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853048406] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:50,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:47:50,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-28 09:47:50,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806033371] [2021-10-28 09:47:50,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:47:50,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:50,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:47:50,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:47:50,035 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:50,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:50,081 INFO L93 Difference]: Finished difference Result 223 states and 281 transitions. [2021-10-28 09:47:50,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:47:50,081 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-28 09:47:50,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:50,082 INFO L225 Difference]: With dead ends: 223 [2021-10-28 09:47:50,083 INFO L226 Difference]: Without dead ends: 154 [2021-10-28 09:47:50,083 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:47:50,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-28 09:47:50,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 125. [2021-10-28 09:47:50,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.2419354838709677) internal successors, (154), 124 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:50,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 154 transitions. [2021-10-28 09:47:50,096 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 154 transitions. Word has length 21 [2021-10-28 09:47:50,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:50,097 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 154 transitions. [2021-10-28 09:47:50,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:50,097 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 154 transitions. [2021-10-28 09:47:50,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 09:47:50,098 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:50,099 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:47:50,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 09:47:50,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:50,313 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:50,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:50,313 INFO L85 PathProgramCache]: Analyzing trace with hash 2101787646, now seen corresponding path program 2 times [2021-10-28 09:47:50,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:50,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310544375] [2021-10-28 09:47:50,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:50,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:50,426 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 09:47:50,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:50,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310544375] [2021-10-28 09:47:50,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310544375] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:50,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66703445] [2021-10-28 09:47:50,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:47:50,427 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:50,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:50,428 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:50,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 09:47:50,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:47:50,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:47:50,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 09:47:50,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:47:50,617 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 09:47:50,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66703445] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:50,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:47:50,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-10-28 09:47:50,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227467162] [2021-10-28 09:47:50,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 09:47:50,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:50,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:47:50,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:47:50,623 INFO L87 Difference]: Start difference. First operand 125 states and 154 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 09:47:50,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:50,757 INFO L93 Difference]: Finished difference Result 324 states and 408 transitions. [2021-10-28 09:47:50,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 09:47:50,757 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 09:47:50,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:50,760 INFO L225 Difference]: With dead ends: 324 [2021-10-28 09:47:50,760 INFO L226 Difference]: Without dead ends: 243 [2021-10-28 09:47:50,764 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-10-28 09:47:50,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-10-28 09:47:50,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 140. [2021-10-28 09:47:50,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.2374100719424461) internal successors, (172), 139 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:50,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 172 transitions. [2021-10-28 09:47:50,788 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 172 transitions. Word has length 24 [2021-10-28 09:47:50,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:50,788 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 172 transitions. [2021-10-28 09:47:50,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 09:47:50,789 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 172 transitions. [2021-10-28 09:47:50,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 09:47:50,790 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:50,790 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:47:50,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 09:47:51,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:51,009 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:51,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:51,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1847320295, now seen corresponding path program 3 times [2021-10-28 09:47:51,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:51,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912238775] [2021-10-28 09:47:51,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:51,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:51,077 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 09:47:51,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:51,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912238775] [2021-10-28 09:47:51,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912238775] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:51,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997792508] [2021-10-28 09:47:51,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:47:51,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:51,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:51,093 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:51,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 09:47:51,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 09:47:51,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:47:51,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 09:47:51,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:47:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-28 09:47:51,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997792508] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:47:51,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:47:51,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2021-10-28 09:47:51,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329676023] [2021-10-28 09:47:51,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:47:51,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:51,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:47:51,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:47:51,272 INFO L87 Difference]: Start difference. First operand 140 states and 172 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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 09:47:51,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:51,328 INFO L93 Difference]: Finished difference Result 265 states and 321 transitions. [2021-10-28 09:47:51,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:47:51,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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 09:47:51,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:51,331 INFO L225 Difference]: With dead ends: 265 [2021-10-28 09:47:51,331 INFO L226 Difference]: Without dead ends: 185 [2021-10-28 09:47:51,332 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:47:51,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-10-28 09:47:51,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 146. [2021-10-28 09:47:51,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.2275862068965517) internal successors, (178), 145 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:51,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 178 transitions. [2021-10-28 09:47:51,355 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 178 transitions. Word has length 27 [2021-10-28 09:47:51,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:51,357 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 178 transitions. [2021-10-28 09:47:51,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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 09:47:51,358 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 178 transitions. [2021-10-28 09:47:51,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 09:47:51,364 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:51,365 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:47:51,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 09:47:51,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 09:47:51,565 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:51,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:51,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1668645725, now seen corresponding path program 4 times [2021-10-28 09:47:51,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:51,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365821657] [2021-10-28 09:47:51,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:51,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:51,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:51,643 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 09:47:51,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:51,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365821657] [2021-10-28 09:47:51,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365821657] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:51,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251192650] [2021-10-28 09:47:51,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:47:51,645 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:51,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:51,657 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:51,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 09:47:51,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:47:51,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:47:51,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 09:47:51,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:47:51,860 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 09:47:51,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251192650] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:51,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:47:51,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-10-28 09:47:51,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352427652] [2021-10-28 09:47:51,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:47:51,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:51,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:47:51,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:47:51,863 INFO L87 Difference]: Start difference. First operand 146 states and 178 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:51,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:51,946 INFO L93 Difference]: Finished difference Result 325 states and 394 transitions. [2021-10-28 09:47:51,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:47:51,947 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-28 09:47:51,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:51,949 INFO L225 Difference]: With dead ends: 325 [2021-10-28 09:47:51,949 INFO L226 Difference]: Without dead ends: 231 [2021-10-28 09:47:51,950 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:47:51,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-10-28 09:47:51,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 167. [2021-10-28 09:47:51,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.216867469879518) internal successors, (202), 166 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:51,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 202 transitions. [2021-10-28 09:47:51,963 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 202 transitions. Word has length 27 [2021-10-28 09:47:51,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:51,964 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 202 transitions. [2021-10-28 09:47:51,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:51,964 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 202 transitions. [2021-10-28 09:47:51,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-28 09:47:51,968 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:51,968 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:47:51,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 09:47:52,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:52,173 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:52,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:52,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1538147426, now seen corresponding path program 5 times [2021-10-28 09:47:52,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:52,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44718886] [2021-10-28 09:47:52,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:52,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:52,259 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 09:47:52,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:52,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44718886] [2021-10-28 09:47:52,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44718886] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:52,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317371725] [2021-10-28 09:47:52,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:47:52,263 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:52,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:52,277 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:52,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 09:47:52,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-10-28 09:47:52,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:47:52,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 09:47:52,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:47:52,484 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 09:47:52,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317371725] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:52,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:47:52,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-10-28 09:47:52,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317297578] [2021-10-28 09:47:52,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 09:47:52,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:52,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:47:52,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:47:52,486 INFO L87 Difference]: Start difference. First operand 167 states and 202 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 09:47:52,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:52,544 INFO L93 Difference]: Finished difference Result 358 states and 432 transitions. [2021-10-28 09:47:52,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 09:47:52,544 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-28 09:47:52,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:52,546 INFO L225 Difference]: With dead ends: 358 [2021-10-28 09:47:52,546 INFO L226 Difference]: Without dead ends: 252 [2021-10-28 09:47:52,547 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:47:52,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-10-28 09:47:52,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 188. [2021-10-28 09:47:52,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.2085561497326203) internal successors, (226), 187 states have internal predecessors, (226), 0 states have call successors, (0), 0 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 09:47:52,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 226 transitions. [2021-10-28 09:47:52,560 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 226 transitions. Word has length 30 [2021-10-28 09:47:52,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:52,561 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 226 transitions. [2021-10-28 09:47:52,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 09:47:52,562 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 226 transitions. [2021-10-28 09:47:52,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-28 09:47:52,563 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:52,563 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:47:52,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 09:47:52,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:52,789 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:52,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:52,789 INFO L85 PathProgramCache]: Analyzing trace with hash 808724797, now seen corresponding path program 6 times [2021-10-28 09:47:52,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:52,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363199460] [2021-10-28 09:47:52,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:52,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:52,886 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 09:47:52,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:52,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363199460] [2021-10-28 09:47:52,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363199460] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:52,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438089531] [2021-10-28 09:47:52,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:47:52,887 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:52,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:52,888 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:52,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 09:47:53,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-28 09:47:53,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:47:53,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 09:47:53,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:47:53,365 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-10-28 09:47:53,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438089531] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:47:53,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:47:53,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2021-10-28 09:47:53,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426175520] [2021-10-28 09:47:53,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:47:53,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:53,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:47:53,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-10-28 09:47:53,368 INFO L87 Difference]: Start difference. First operand 188 states and 226 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 09:47:53,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:53,464 INFO L93 Difference]: Finished difference Result 270 states and 322 transitions. [2021-10-28 09:47:53,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 09:47:53,465 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 33 [2021-10-28 09:47:53,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:53,467 INFO L225 Difference]: With dead ends: 270 [2021-10-28 09:47:53,467 INFO L226 Difference]: Without dead ends: 268 [2021-10-28 09:47:53,468 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-10-28 09:47:53,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-10-28 09:47:53,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 188. [2021-10-28 09:47:53,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.2085561497326203) internal successors, (226), 187 states have internal predecessors, (226), 0 states have call successors, (0), 0 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 09:47:53,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 226 transitions. [2021-10-28 09:47:53,481 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 226 transitions. Word has length 33 [2021-10-28 09:47:53,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:53,482 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 226 transitions. [2021-10-28 09:47:53,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 09:47:53,482 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 226 transitions. [2021-10-28 09:47:53,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-28 09:47:53,483 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:53,483 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:47:53,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 09:47:53,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-28 09:47:53,703 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:53,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:53,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1165631, now seen corresponding path program 1 times [2021-10-28 09:47:53,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:53,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900316673] [2021-10-28 09:47:53,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:53,704 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:53,738 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-10-28 09:47:53,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:53,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900316673] [2021-10-28 09:47:53,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900316673] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:47:53,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:47:53,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:47:53,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952480914] [2021-10-28 09:47:53,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:47:53,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:53,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:47:53,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:47:53,741 INFO L87 Difference]: Start difference. First operand 188 states and 226 transitions. Second operand has 3 states, 3 states have (on average 4.0) 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 09:47:53,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:53,759 INFO L93 Difference]: Finished difference Result 307 states and 370 transitions. [2021-10-28 09:47:53,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:47:53,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) 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 33 [2021-10-28 09:47:53,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:53,761 INFO L225 Difference]: With dead ends: 307 [2021-10-28 09:47:53,761 INFO L226 Difference]: Without dead ends: 200 [2021-10-28 09:47:53,762 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 09:47:53,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-10-28 09:47:53,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 184. [2021-10-28 09:47:53,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.2021857923497268) internal successors, (220), 183 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:53,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 220 transitions. [2021-10-28 09:47:53,778 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 220 transitions. Word has length 33 [2021-10-28 09:47:53,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:53,779 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 220 transitions. [2021-10-28 09:47:53,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) 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 09:47:53,779 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 220 transitions. [2021-10-28 09:47:53,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-28 09:47:53,780 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:53,781 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 14, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 09:47:53,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-28 09:47:53,781 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:53,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:53,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1043308475, now seen corresponding path program 1 times [2021-10-28 09:47:53,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:53,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614197702] [2021-10-28 09:47:53,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:53,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:53,900 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 210 proven. 92 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-10-28 09:47:53,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:53,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614197702] [2021-10-28 09:47:53,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614197702] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:53,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300556650] [2021-10-28 09:47:53,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:53,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:53,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:53,903 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:53,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 09:47:54,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:54,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 09:47:54,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:47:54,279 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 210 proven. 92 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-10-28 09:47:54,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300556650] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:54,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:47:54,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-10-28 09:47:54,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120988473] [2021-10-28 09:47:54,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 09:47:54,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:54,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 09:47:54,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:47:54,284 INFO L87 Difference]: Start difference. First operand 184 states and 220 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 09:47:54,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:54,369 INFO L93 Difference]: Finished difference Result 383 states and 458 transitions. [2021-10-28 09:47:54,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:47:54,369 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-10-28 09:47:54,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:54,372 INFO L225 Difference]: With dead ends: 383 [2021-10-28 09:47:54,372 INFO L226 Difference]: Without dead ends: 269 [2021-10-28 09:47:54,374 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:47:54,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-10-28 09:47:54,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 205. [2021-10-28 09:47:54,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.196078431372549) internal successors, (244), 204 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:54,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 244 transitions. [2021-10-28 09:47:54,394 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 244 transitions. Word has length 63 [2021-10-28 09:47:54,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:54,395 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 244 transitions. [2021-10-28 09:47:54,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 09:47:54,395 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 244 transitions. [2021-10-28 09:47:54,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-10-28 09:47:54,396 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:54,397 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 09:47:54,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 09:47:54,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 09:47:54,612 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:54,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:54,613 INFO L85 PathProgramCache]: Analyzing trace with hash -305796463, now seen corresponding path program 2 times [2021-10-28 09:47:54,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:54,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263135525] [2021-10-28 09:47:54,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:54,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:54,731 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 263 proven. 117 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-10-28 09:47:54,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:54,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263135525] [2021-10-28 09:47:54,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263135525] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:54,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825951903] [2021-10-28 09:47:54,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:47:54,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:54,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:54,733 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:54,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 09:47:54,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:47:54,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:47:54,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 09:47:54,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:47:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 263 proven. 117 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-10-28 09:47:55,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825951903] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:55,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:47:55,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-10-28 09:47:55,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500504828] [2021-10-28 09:47:55,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 09:47:55,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:55,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 09:47:55,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:47:55,061 INFO L87 Difference]: Start difference. First operand 205 states and 244 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:55,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:55,149 INFO L93 Difference]: Finished difference Result 416 states and 496 transitions. [2021-10-28 09:47:55,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 09:47:55,150 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-10-28 09:47:55,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:55,151 INFO L225 Difference]: With dead ends: 416 [2021-10-28 09:47:55,152 INFO L226 Difference]: Without dead ends: 290 [2021-10-28 09:47:55,152 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:47:55,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-10-28 09:47:55,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 226. [2021-10-28 09:47:55,168 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 09:47:55,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 268 transitions. [2021-10-28 09:47:55,169 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 268 transitions. Word has length 69 [2021-10-28 09:47:55,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:55,170 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 268 transitions. [2021-10-28 09:47:55,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:55,170 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 268 transitions. [2021-10-28 09:47:55,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-28 09:47:55,171 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:55,171 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 09:47:55,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 09:47:55,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 09:47:55,396 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:55,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:55,396 INFO L85 PathProgramCache]: Analyzing trace with hash 721559429, now seen corresponding path program 3 times [2021-10-28 09:47:55,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:55,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057865394] [2021-10-28 09:47:55,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:55,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:55,506 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 322 proven. 145 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-10-28 09:47:55,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:55,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057865394] [2021-10-28 09:47:55,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057865394] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:55,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233455808] [2021-10-28 09:47:55,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:47:55,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:55,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:55,508 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:55,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 09:47:55,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 09:47:55,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:47:55,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 09:47:55,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:47:56,339 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 28 proven. 326 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-10-28 09:47:56,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233455808] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:56,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:47:56,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-10-28 09:47:56,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149677742] [2021-10-28 09:47:56,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 09:47:56,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:56,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 09:47:56,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-10-28 09:47:56,342 INFO L87 Difference]: Start difference. First operand 226 states and 268 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:57,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:57,087 INFO L93 Difference]: Finished difference Result 847 states and 1009 transitions. [2021-10-28 09:47:57,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-28 09:47:57,087 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-10-28 09:47:57,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:57,091 INFO L225 Difference]: With dead ends: 847 [2021-10-28 09:47:57,092 INFO L226 Difference]: Without dead ends: 709 [2021-10-28 09:47:57,093 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=585, Invalid=2277, Unknown=0, NotChecked=0, Total=2862 [2021-10-28 09:47:57,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-10-28 09:47:57,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 398. [2021-10-28 09:47:57,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 1.1914357682619647) internal successors, (473), 397 states have internal predecessors, (473), 0 states have call successors, (0), 0 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 09:47:57,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 473 transitions. [2021-10-28 09:47:57,125 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 473 transitions. Word has length 75 [2021-10-28 09:47:57,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:57,126 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 473 transitions. [2021-10-28 09:47:57,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:57,126 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 473 transitions. [2021-10-28 09:47:57,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-10-28 09:47:57,127 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:57,128 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:47:57,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 09:47:57,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 09:47:57,341 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:57,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:57,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1200974189, now seen corresponding path program 1 times [2021-10-28 09:47:57,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:57,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283030420] [2021-10-28 09:47:57,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:57,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:57,459 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 390 proven. 176 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-10-28 09:47:57,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:57,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283030420] [2021-10-28 09:47:57,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283030420] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:57,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28559958] [2021-10-28 09:47:57,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:57,460 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:57,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:57,461 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:57,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 09:47:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:57,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 09:47:57,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:47:57,901 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 387 proven. 176 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-10-28 09:47:57,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28559958] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:57,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:47:57,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-10-28 09:47:57,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312192469] [2021-10-28 09:47:57,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 09:47:57,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:57,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 09:47:57,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:47:57,903 INFO L87 Difference]: Start difference. First operand 398 states and 473 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:58,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:58,042 INFO L93 Difference]: Finished difference Result 826 states and 978 transitions. [2021-10-28 09:47:58,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 09:47:58,043 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-10-28 09:47:58,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:58,046 INFO L225 Difference]: With dead ends: 826 [2021-10-28 09:47:58,046 INFO L226 Difference]: Without dead ends: 525 [2021-10-28 09:47:58,047 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:47:58,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-10-28 09:47:58,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 419. [2021-10-28 09:47:58,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 1.1889952153110048) internal successors, (497), 418 states have internal predecessors, (497), 0 states have call successors, (0), 0 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 09:47:58,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 497 transitions. [2021-10-28 09:47:58,087 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 497 transitions. Word has length 81 [2021-10-28 09:47:58,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:58,087 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 497 transitions. [2021-10-28 09:47:58,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:58,088 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 497 transitions. [2021-10-28 09:47:58,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-10-28 09:47:58,090 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:58,090 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:47:58,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 09:47:58,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 09:47:58,309 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:58,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:58,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1904992903, now seen corresponding path program 2 times [2021-10-28 09:47:58,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:58,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896173910] [2021-10-28 09:47:58,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:58,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 458 proven. 210 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-10-28 09:47:58,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:58,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896173910] [2021-10-28 09:47:58,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896173910] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:58,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793223851] [2021-10-28 09:47:58,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:47:58,449 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:58,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:58,450 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:58,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 09:47:58,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:47:58,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:47:58,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 09:47:58,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:47:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 5 proven. 183 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2021-10-28 09:47:59,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793223851] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:59,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:47:59,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 18 [2021-10-28 09:47:59,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844624209] [2021-10-28 09:47:59,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 09:47:59,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:47:59,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 09:47:59,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2021-10-28 09:47:59,018 INFO L87 Difference]: Start difference. First operand 419 states and 497 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:59,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:47:59,360 INFO L93 Difference]: Finished difference Result 1441 states and 1671 transitions. [2021-10-28 09:47:59,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 09:47:59,361 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-10-28 09:47:59,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:47:59,367 INFO L225 Difference]: With dead ends: 1441 [2021-10-28 09:47:59,367 INFO L226 Difference]: Without dead ends: 1128 [2021-10-28 09:47:59,368 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=334, Invalid=596, Unknown=0, NotChecked=0, Total=930 [2021-10-28 09:47:59,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-10-28 09:47:59,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 443. [2021-10-28 09:47:59,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.1900452488687783) internal successors, (526), 442 states have internal predecessors, (526), 0 states have call successors, (0), 0 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 09:47:59,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 526 transitions. [2021-10-28 09:47:59,420 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 526 transitions. Word has length 87 [2021-10-28 09:47:59,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:47:59,420 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 526 transitions. [2021-10-28 09:47:59,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:47:59,420 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 526 transitions. [2021-10-28 09:47:59,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-10-28 09:47:59,422 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:47:59,423 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:47:59,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 09:47:59,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:59,637 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:47:59,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:47:59,637 INFO L85 PathProgramCache]: Analyzing trace with hash 900910931, now seen corresponding path program 3 times [2021-10-28 09:47:59,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:47:59,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124489832] [2021-10-28 09:47:59,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:47:59,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:47:59,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:47:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 535 proven. 247 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2021-10-28 09:47:59,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:47:59,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124489832] [2021-10-28 09:47:59,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124489832] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:47:59,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608553424] [2021-10-28 09:47:59,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:47:59,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:47:59,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:47:59,788 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:47:59,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 09:48:00,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 09:48:00,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:48:00,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 09:48:00,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:48:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 37 proven. 539 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2021-10-28 09:48:00,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608553424] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:00,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:48:00,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 23 [2021-10-28 09:48:00,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959746518] [2021-10-28 09:48:00,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 09:48:00,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:48:00,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 09:48:00,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2021-10-28 09:48:00,859 INFO L87 Difference]: Start difference. First operand 443 states and 526 transitions. Second operand has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:02,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:48:02,335 INFO L93 Difference]: Finished difference Result 1399 states and 1602 transitions. [2021-10-28 09:48:02,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-10-28 09:48:02,336 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-10-28 09:48:02,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:48:02,342 INFO L225 Difference]: With dead ends: 1399 [2021-10-28 09:48:02,342 INFO L226 Difference]: Without dead ends: 1068 [2021-10-28 09:48:02,346 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1863 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1260, Invalid=5220, Unknown=0, NotChecked=0, Total=6480 [2021-10-28 09:48:02,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-10-28 09:48:02,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 488. [2021-10-28 09:48:02,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 1.1868583162217659) internal successors, (578), 487 states have internal predecessors, (578), 0 states have call successors, (0), 0 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 09:48:02,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 578 transitions. [2021-10-28 09:48:02,400 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 578 transitions. Word has length 93 [2021-10-28 09:48:02,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:48:02,400 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 578 transitions. [2021-10-28 09:48:02,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:02,400 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 578 transitions. [2021-10-28 09:48:02,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-28 09:48:02,402 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:48:02,402 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:48:02,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 09:48:02,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:02,629 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:48:02,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:48:02,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1378183737, now seen corresponding path program 4 times [2021-10-28 09:48:02,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:48:02,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789281486] [2021-10-28 09:48:02,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:48:02,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:48:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:02,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 621 proven. 287 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-10-28 09:48:02,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:48:02,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789281486] [2021-10-28 09:48:02,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789281486] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:02,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879086179] [2021-10-28 09:48:02,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:48:02,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:02,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:48:02,802 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:48:02,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 09:48:03,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:48:03,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:48:03,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 09:48:03,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:48:03,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 881 proven. 55 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-10-28 09:48:03,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879086179] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:03,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:48:03,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-10-28 09:48:03,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810569961] [2021-10-28 09:48:03,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-28 09:48:03,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:48:03,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-28 09:48:03,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 09:48:03,508 INFO L87 Difference]: Start difference. First operand 488 states and 578 transitions. Second operand has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:04,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:48:04,328 INFO L93 Difference]: Finished difference Result 1518 states and 1756 transitions. [2021-10-28 09:48:04,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-28 09:48:04,329 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-10-28 09:48:04,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:48:04,334 INFO L225 Difference]: With dead ends: 1518 [2021-10-28 09:48:04,334 INFO L226 Difference]: Without dead ends: 1151 [2021-10-28 09:48:04,336 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=847, Invalid=3059, Unknown=0, NotChecked=0, Total=3906 [2021-10-28 09:48:04,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-10-28 09:48:04,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 749. [2021-10-28 09:48:04,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 1.1470588235294117) internal successors, (858), 748 states have internal predecessors, (858), 0 states have call successors, (0), 0 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 09:48:04,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 858 transitions. [2021-10-28 09:48:04,438 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 858 transitions. Word has length 99 [2021-10-28 09:48:04,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:48:04,439 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 858 transitions. [2021-10-28 09:48:04,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:04,439 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 858 transitions. [2021-10-28 09:48:04,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-28 09:48:04,441 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:48:04,441 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 28, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:48:04,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 09:48:04,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:04,669 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:48:04,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:48:04,669 INFO L85 PathProgramCache]: Analyzing trace with hash 198529999, now seen corresponding path program 5 times [2021-10-28 09:48:04,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:48:04,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111604206] [2021-10-28 09:48:04,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:48:04,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:48:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:04,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 707 proven. 330 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-10-28 09:48:04,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:48:04,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111604206] [2021-10-28 09:48:04,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111604206] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:04,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913893300] [2021-10-28 09:48:04,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:48:04,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:04,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:48:04,852 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:48:04,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 09:48:05,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-10-28 09:48:05,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:48:05,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 09:48:05,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:48:05,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 707 proven. 330 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-10-28 09:48:05,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913893300] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:05,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:48:05,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-10-28 09:48:05,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929155597] [2021-10-28 09:48:05,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 09:48:05,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:48:05,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 09:48:05,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-10-28 09:48:05,560 INFO L87 Difference]: Start difference. First operand 749 states and 858 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 09:48:05,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:48:05,820 INFO L93 Difference]: Finished difference Result 1843 states and 2077 transitions. [2021-10-28 09:48:05,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 09:48:05,820 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 09:48:05,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:48:05,827 INFO L225 Difference]: With dead ends: 1843 [2021-10-28 09:48:05,827 INFO L226 Difference]: Without dead ends: 1229 [2021-10-28 09:48:05,829 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-10-28 09:48:05,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2021-10-28 09:48:05,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 800. [2021-10-28 09:48:05,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 1.1476846057571966) internal successors, (917), 799 states have internal predecessors, (917), 0 states have call successors, (0), 0 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 09:48:05,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 917 transitions. [2021-10-28 09:48:05,936 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 917 transitions. Word has length 105 [2021-10-28 09:48:05,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:48:05,937 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 917 transitions. [2021-10-28 09:48:05,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 09:48:05,937 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 917 transitions. [2021-10-28 09:48:05,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-10-28 09:48:05,939 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:48:05,939 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 30, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:48:05,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 09:48:06,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:06,165 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:48:06,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:48:06,165 INFO L85 PathProgramCache]: Analyzing trace with hash 21201355, now seen corresponding path program 6 times [2021-10-28 09:48:06,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:48:06,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091318179] [2021-10-28 09:48:06,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:48:06,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:48:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:06,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 802 proven. 376 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-10-28 09:48:06,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:48:06,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091318179] [2021-10-28 09:48:06,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091318179] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:06,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945602628] [2021-10-28 09:48:06,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:48:06,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:06,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:48:06,350 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:48:06,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 09:48:06,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-28 09:48:06,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:48:06,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 09:48:06,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:48:07,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 46 proven. 806 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2021-10-28 09:48:07,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945602628] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:07,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:48:07,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 26 [2021-10-28 09:48:07,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503834844] [2021-10-28 09:48:07,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-28 09:48:07,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:48:07,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-28 09:48:07,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=460, Unknown=0, NotChecked=0, Total=650 [2021-10-28 09:48:07,477 INFO L87 Difference]: Start difference. First operand 800 states and 917 transitions. Second operand has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:08,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:48:08,705 INFO L93 Difference]: Finished difference Result 2088 states and 2365 transitions. [2021-10-28 09:48:08,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-10-28 09:48:08,705 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-10-28 09:48:08,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:48:08,713 INFO L225 Difference]: With dead ends: 2088 [2021-10-28 09:48:08,713 INFO L226 Difference]: Without dead ends: 1435 [2021-10-28 09:48:08,717 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1248, Invalid=4758, Unknown=0, NotChecked=0, Total=6006 [2021-10-28 09:48:08,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2021-10-28 09:48:08,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 916. [2021-10-28 09:48:08,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 1.146448087431694) internal successors, (1049), 915 states have internal predecessors, (1049), 0 states have call successors, (0), 0 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 09:48:08,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1049 transitions. [2021-10-28 09:48:08,829 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1049 transitions. Word has length 111 [2021-10-28 09:48:08,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:48:08,830 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 1049 transitions. [2021-10-28 09:48:08,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:08,830 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1049 transitions. [2021-10-28 09:48:08,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-10-28 09:48:08,832 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:48:08,832 INFO L513 BasicCegarLoop]: trace histogram [35, 35, 33, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 09:48:08,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 09:48:09,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-28 09:48:09,061 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:48:09,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:48:09,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1574829550, now seen corresponding path program 1 times [2021-10-28 09:48:09,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:48:09,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204813782] [2021-10-28 09:48:09,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:48:09,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:48:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:09,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 955 proven. 425 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2021-10-28 09:48:09,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:48:09,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204813782] [2021-10-28 09:48:09,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204813782] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:09,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570835153] [2021-10-28 09:48:09,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:48:09,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:09,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:48:09,279 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:48:09,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 09:48:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:09,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 09:48:09,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:48:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 955 proven. 425 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2021-10-28 09:48:09,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570835153] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:09,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:48:09,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-10-28 09:48:09,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396225052] [2021-10-28 09:48:09,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 09:48:09,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:48:09,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 09:48:09,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-10-28 09:48:09,988 INFO L87 Difference]: Start difference. First operand 916 states and 1049 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:10,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:48:10,264 INFO L93 Difference]: Finished difference Result 2152 states and 2433 transitions. [2021-10-28 09:48:10,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 09:48:10,264 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-10-28 09:48:10,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:48:10,271 INFO L225 Difference]: With dead ends: 2152 [2021-10-28 09:48:10,271 INFO L226 Difference]: Without dead ends: 1395 [2021-10-28 09:48:10,273 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-10-28 09:48:10,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2021-10-28 09:48:10,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 964. [2021-10-28 09:48:10,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 1.1474558670820354) internal successors, (1105), 963 states have internal predecessors, (1105), 0 states have call successors, (0), 0 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 09:48:10,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1105 transitions. [2021-10-28 09:48:10,388 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1105 transitions. Word has length 120 [2021-10-28 09:48:10,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:48:10,389 INFO L470 AbstractCegarLoop]: Abstraction has 964 states and 1105 transitions. [2021-10-28 09:48:10,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:10,389 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1105 transitions. [2021-10-28 09:48:10,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-10-28 09:48:10,391 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:48:10,392 INFO L513 BasicCegarLoop]: trace histogram [36, 36, 34, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 09:48:10,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 09:48:10,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-28 09:48:10,605 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:48:10,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:48:10,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1504583927, now seen corresponding path program 2 times [2021-10-28 09:48:10,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:48:10,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074054722] [2021-10-28 09:48:10,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:48:10,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:48:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:10,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1968 backedges. 1010 proven. 477 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2021-10-28 09:48:10,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:48:10,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074054722] [2021-10-28 09:48:10,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074054722] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:10,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407879870] [2021-10-28 09:48:10,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:48:10,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:10,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:48:10,826 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:48:10,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 09:48:11,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:48:11,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:48:11,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 09:48:11,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:48:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1968 backedges. 5 proven. 1449 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2021-10-28 09:48:11,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407879870] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:11,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:48:11,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 24 [2021-10-28 09:48:11,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398372873] [2021-10-28 09:48:11,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-28 09:48:11,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:48:11,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-28 09:48:11,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2021-10-28 09:48:11,743 INFO L87 Difference]: Start difference. First operand 964 states and 1105 transitions. Second operand has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:12,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:48:12,394 INFO L93 Difference]: Finished difference Result 2496 states and 2861 transitions. [2021-10-28 09:48:12,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-28 09:48:12,395 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-10-28 09:48:12,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:48:12,403 INFO L225 Difference]: With dead ends: 2496 [2021-10-28 09:48:12,403 INFO L226 Difference]: Without dead ends: 1703 [2021-10-28 09:48:12,406 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=655, Invalid=1151, Unknown=0, NotChecked=0, Total=1806 [2021-10-28 09:48:12,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-10-28 09:48:12,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1287. [2021-10-28 09:48:12,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 1.1632970451010887) internal successors, (1496), 1286 states have internal predecessors, (1496), 0 states have call successors, (0), 0 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 09:48:12,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 1496 transitions. [2021-10-28 09:48:12,605 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 1496 transitions. Word has length 123 [2021-10-28 09:48:12,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:48:12,606 INFO L470 AbstractCegarLoop]: Abstraction has 1287 states and 1496 transitions. [2021-10-28 09:48:12,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:12,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 1496 transitions. [2021-10-28 09:48:12,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-10-28 09:48:12,609 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:48:12,609 INFO L513 BasicCegarLoop]: trace histogram [38, 38, 36, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 09:48:12,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-28 09:48:12,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 09:48:12,837 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:48:12,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:48:12,837 INFO L85 PathProgramCache]: Analyzing trace with hash -645031407, now seen corresponding path program 3 times [2021-10-28 09:48:12,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:48:12,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212630817] [2021-10-28 09:48:12,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:48:12,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:48:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:13,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 1123 proven. 532 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2021-10-28 09:48:13,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:48:13,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212630817] [2021-10-28 09:48:13,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212630817] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:13,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106836786] [2021-10-28 09:48:13,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:48:13,089 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:13,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:48:13,090 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:48:13,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-28 09:48:13,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 09:48:13,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:48:13,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 09:48:13,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:48:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 0 proven. 1127 refuted. 0 times theorem prover too weak. 1064 trivial. 0 not checked. [2021-10-28 09:48:14,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106836786] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:14,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:48:14,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 28 [2021-10-28 09:48:14,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998348052] [2021-10-28 09:48:14,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-28 09:48:14,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:48:14,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-28 09:48:14,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=513, Unknown=0, NotChecked=0, Total=756 [2021-10-28 09:48:14,675 INFO L87 Difference]: Start difference. First operand 1287 states and 1496 transitions. Second operand has 28 states, 28 states have (on average 3.357142857142857) 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 09:48:16,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:48:16,564 INFO L93 Difference]: Finished difference Result 2996 states and 3458 transitions. [2021-10-28 09:48:16,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-10-28 09:48:16,565 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.357142857142857) 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 129 [2021-10-28 09:48:16,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:48:16,574 INFO L225 Difference]: With dead ends: 2996 [2021-10-28 09:48:16,574 INFO L226 Difference]: Without dead ends: 1896 [2021-10-28 09:48:16,579 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2129 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1914, Invalid=6458, Unknown=0, NotChecked=0, Total=8372 [2021-10-28 09:48:16,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2021-10-28 09:48:16,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1354. [2021-10-28 09:48:16,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1353 states have (on average 1.1574279379157428) internal successors, (1566), 1353 states have internal predecessors, (1566), 0 states have call successors, (0), 0 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 09:48:16,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 1566 transitions. [2021-10-28 09:48:16,729 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 1566 transitions. Word has length 129 [2021-10-28 09:48:16,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:48:16,730 INFO L470 AbstractCegarLoop]: Abstraction has 1354 states and 1566 transitions. [2021-10-28 09:48:16,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.357142857142857) 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 09:48:16,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 1566 transitions. [2021-10-28 09:48:16,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-10-28 09:48:16,735 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:48:16,735 INFO L513 BasicCegarLoop]: trace histogram [60, 60, 57, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2021-10-28 09:48:16,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-28 09:48:16,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-28 09:48:16,961 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:48:16,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:48:16,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1150791729, now seen corresponding path program 4 times [2021-10-28 09:48:16,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:48:16,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408215022] [2021-10-28 09:48:16,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:48:16,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:48:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:17,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5508 backedges. 2484 proven. 590 refuted. 0 times theorem prover too weak. 2434 trivial. 0 not checked. [2021-10-28 09:48:17,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:48:17,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408215022] [2021-10-28 09:48:17,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408215022] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:17,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126006444] [2021-10-28 09:48:17,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:48:17,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:17,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:48:17,264 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:48:17,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-28 09:48:17,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:48:17,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:48:17,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-28 09:48:17,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:48:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5508 backedges. 2484 proven. 590 refuted. 0 times theorem prover too weak. 2434 trivial. 0 not checked. [2021-10-28 09:48:18,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126006444] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:18,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:48:18,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-10-28 09:48:18,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413887512] [2021-10-28 09:48:18,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-28 09:48:18,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:48:18,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-28 09:48:18,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-10-28 09:48:18,297 INFO L87 Difference]: Start difference. First operand 1354 states and 1566 transitions. Second operand has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:18,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:48:18,636 INFO L93 Difference]: Finished difference Result 3003 states and 3452 transitions. [2021-10-28 09:48:18,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 09:48:18,636 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2021-10-28 09:48:18,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:48:18,643 INFO L225 Difference]: With dead ends: 3003 [2021-10-28 09:48:18,643 INFO L226 Difference]: Without dead ends: 1849 [2021-10-28 09:48:18,645 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-10-28 09:48:18,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2021-10-28 09:48:18,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1426. [2021-10-28 09:48:18,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 1.1578947368421053) internal successors, (1650), 1425 states have internal predecessors, (1650), 0 states have call successors, (0), 0 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 09:48:18,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 1650 transitions. [2021-10-28 09:48:18,808 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 1650 transitions. Word has length 201 [2021-10-28 09:48:18,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:48:18,809 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 1650 transitions. [2021-10-28 09:48:18,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:18,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 1650 transitions. [2021-10-28 09:48:18,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-10-28 09:48:18,813 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:48:18,813 INFO L513 BasicCegarLoop]: trace histogram [63, 63, 60, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2021-10-28 09:48:18,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-10-28 09:48:19,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-28 09:48:19,026 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:48:19,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:48:19,027 INFO L85 PathProgramCache]: Analyzing trace with hash -335372444, now seen corresponding path program 5 times [2021-10-28 09:48:19,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:48:19,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399896986] [2021-10-28 09:48:19,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:48:19,027 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:48:19,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6066 backedges. 2734 proven. 651 refuted. 0 times theorem prover too weak. 2681 trivial. 0 not checked. [2021-10-28 09:48:19,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:48:19,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399896986] [2021-10-28 09:48:19,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399896986] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:19,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865878440] [2021-10-28 09:48:19,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:48:19,319 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:19,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:48:19,320 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:48:19,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-28 09:48:20,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2021-10-28 09:48:20,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:48:20,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-28 09:48:20,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:48:21,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6066 backedges. 2868 proven. 610 refuted. 0 times theorem prover too weak. 2588 trivial. 0 not checked. [2021-10-28 09:48:21,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865878440] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:21,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:48:21,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 48 [2021-10-28 09:48:21,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177065097] [2021-10-28 09:48:21,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-28 09:48:21,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:48:21,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-28 09:48:21,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2021-10-28 09:48:21,150 INFO L87 Difference]: Start difference. First operand 1426 states and 1650 transitions. Second operand has 48 states, 48 states have (on average 3.1458333333333335) internal successors, (151), 48 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:29,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:48:29,687 INFO L93 Difference]: Finished difference Result 8960 states and 10420 transitions. [2021-10-28 09:48:29,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 343 states. [2021-10-28 09:48:29,688 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.1458333333333335) internal successors, (151), 48 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 210 [2021-10-28 09:48:29,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:48:29,715 INFO L225 Difference]: With dead ends: 8960 [2021-10-28 09:48:29,715 INFO L226 Difference]: Without dead ends: 7749 [2021-10-28 09:48:29,732 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 343 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59601 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=36106, Invalid=82574, Unknown=0, NotChecked=0, Total=118680 [2021-10-28 09:48:29,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7749 states. [2021-10-28 09:48:30,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7749 to 4912. [2021-10-28 09:48:30,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4912 states, 4911 states have (on average 1.093463653023824) internal successors, (5370), 4911 states have internal predecessors, (5370), 0 states have call successors, (0), 0 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 09:48:30,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4912 states to 4912 states and 5370 transitions. [2021-10-28 09:48:30,535 INFO L78 Accepts]: Start accepts. Automaton has 4912 states and 5370 transitions. Word has length 210 [2021-10-28 09:48:30,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:48:30,536 INFO L470 AbstractCegarLoop]: Abstraction has 4912 states and 5370 transitions. [2021-10-28 09:48:30,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.1458333333333335) internal successors, (151), 48 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:30,536 INFO L276 IsEmpty]: Start isEmpty. Operand 4912 states and 5370 transitions. [2021-10-28 09:48:30,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-10-28 09:48:30,544 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:48:30,545 INFO L513 BasicCegarLoop]: trace histogram [66, 66, 63, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2021-10-28 09:48:30,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-28 09:48:30,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:30,756 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:48:30,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:48:30,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1215260527, now seen corresponding path program 6 times [2021-10-28 09:48:30,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:48:30,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361097795] [2021-10-28 09:48:30,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:48:30,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:48:30,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:31,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6651 backedges. 2996 proven. 715 refuted. 0 times theorem prover too weak. 2940 trivial. 0 not checked. [2021-10-28 09:48:31,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:48:31,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361097795] [2021-10-28 09:48:31,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361097795] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:31,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88399823] [2021-10-28 09:48:31,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:48:31,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:48:31,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:48:31,083 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:48:31,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-28 09:48:31,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-28 09:48:31,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:48:31,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 09:48:31,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:48:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6651 backedges. 3068 proven. 1 refuted. 0 times theorem prover too weak. 3582 trivial. 0 not checked. [2021-10-28 09:48:32,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88399823] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:48:32,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:48:32,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 8] total 31 [2021-10-28 09:48:32,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946367602] [2021-10-28 09:48:32,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-28 09:48:32,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:48:32,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-28 09:48:32,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=613, Unknown=0, NotChecked=0, Total=930 [2021-10-28 09:48:32,531 INFO L87 Difference]: Start difference. First operand 4912 states and 5370 transitions. Second operand has 31 states, 31 states have (on average 3.4516129032258065) internal successors, (107), 31 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:34,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:48:34,495 INFO L93 Difference]: Finished difference Result 9565 states and 10591 transitions. [2021-10-28 09:48:34,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-28 09:48:34,495 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.4516129032258065) internal successors, (107), 31 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 219 [2021-10-28 09:48:34,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:48:34,496 INFO L225 Difference]: With dead ends: 9565 [2021-10-28 09:48:34,496 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 09:48:34,503 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1995, Invalid=4325, Unknown=0, NotChecked=0, Total=6320 [2021-10-28 09:48:34,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 09:48:34,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 09:48:34,503 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 09:48:34,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 09:48:34,504 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 219 [2021-10-28 09:48:34,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:48:34,504 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:48:34,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.4516129032258065) internal successors, (107), 31 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:48:34,504 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 09:48:34,504 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 09:48:34,506 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 09:48:34,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-10-28 09:48:34,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 09:48:34,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-28 09:48:34,714 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:48:34,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:54:44,672 WARN L207 SmtUtils]: Spent 6.16 m on a formula simplification. DAG size of input: 5334 DAG size of output: 3539 [2021-10-28 09:56:55,328 WARN L207 SmtUtils]: Spent 2.18 m on a formula simplification. DAG size of input: 3421 DAG size of output: 165 [2021-10-28 09:56:55,332 INFO L857 garLoopResultBuilder]: For program point L23-2(lines 23 24) no Hoare annotation was computed. [2021-10-28 09:56:55,333 INFO L853 garLoopResultBuilder]: At program point L23-3(lines 23 24) the Hoare annotation is: (let ((.cse42 (+ ~last~0 1))) (let ((.cse18 (<= ULTIMATE.start_main_~c~0 (+ 7 ~last~0))) (.cse10 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 12))) (.cse20 (<= ULTIMATE.start_main_~c~0 10)) (.cse16 (= ULTIMATE.start_main_~c~0 0)) (.cse17 (<= 7 ULTIMATE.start_main_~c~0)) (.cse29 (<= ULTIMATE.start_main_~c~0 7)) (.cse30 (<= ULTIMATE.start_main_~c~0 12)) (.cse25 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 11))) (.cse24 (<= ULTIMATE.start_main_~c~0 2)) (.cse6 (<= 2 ULTIMATE.start_main_~c~0)) (.cse13 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 2))) (.cse31 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 5))) (.cse26 (<= 5 ULTIMATE.start_main_~c~0)) (.cse27 (<= ULTIMATE.start_main_~c~0 5)) (.cse22 (<= 12 ULTIMATE.start_main_~c~0)) (.cse35 (<= 11 ULTIMATE.start_main_~c~0)) (.cse38 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 8))) (.cse28 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 4))) (.cse23 (<= 4 ULTIMATE.start_main_~c~0)) (.cse19 (<= 10 ULTIMATE.start_main_~c~0)) (.cse39 (<= ~last~0 17)) (.cse37 (<= ULTIMATE.start_main_~c~0 8)) (.cse21 (<= 8 ULTIMATE.start_main_~c~0)) (.cse3 (= ULTIMATE.start_main_~st~0 1)) (.cse8 (<= 13 ULTIMATE.start_main_~c~0)) (.cse7 (< ULTIMATE.start_main_~c~0 200001)) (.cse14 (<= ULTIMATE.start_main_~c~0 6)) (.cse11 (<= 6 ULTIMATE.start_main_~c~0)) (.cse41 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 6))) (.cse32 (<= 1 ULTIMATE.start_main_~c~0)) (.cse40 (<= ULTIMATE.start_main_~c~0 .cse42)) (.cse33 (<= ULTIMATE.start_main_~c~0 1)) (.cse0 (<= 3 ULTIMATE.start_main_~c~0)) (.cse1 (<= ULTIMATE.start_main_~c~0 3)) (.cse2 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse12 (<= .cse42 ULTIMATE.start_main_~c~0)) (.cse4 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~a~0)) (.cse15 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 3))) (.cse5 (= ULTIMATE.start_main_~b~0 0)) (.cse9 (<= ~last~0 2)) (.cse34 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 9))) (.cse36 (<= 9 ULTIMATE.start_main_~c~0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse5 .cse6 .cse7 .cse3 .cse4) (and .cse8 .cse2 .cse7 .cse3 .cse4) (and .cse9 .cse10 .cse2 .cse11 .cse4) (and .cse5 .cse12 .cse6 .cse7 .cse4 .cse13) (and .cse2 .cse14 .cse12 .cse11 .cse4 .cse15) (and .cse2 .cse3 .cse4 .cse16) (and .cse17 .cse9 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 13)) .cse2 .cse4) (and .cse17 .cse5 .cse18 .cse12 .cse7 .cse4) (and .cse18 .cse19 .cse2 .cse12 .cse4 .cse20) (and .cse9 .cse2 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 14)) .cse4 .cse21) (and .cse5 .cse22 .cse9 .cse10 .cse4) (and (<= ULTIMATE.start_main_~c~0 4) .cse2 .cse3 .cse4 .cse23) (and .cse24 .cse2 .cse6 .cse3 .cse4) (and .cse25 .cse26 .cse27 .cse2 .cse12 .cse4) (and .cse19 .cse2 .cse3 .cse4 .cse20) (and .cse17 .cse2 .cse12 .cse28 .cse29 .cse4) (and .cse22 .cse2 .cse30 .cse3 .cse4) (and .cse5 .cse3 .cse4 .cse16) (and .cse26 .cse5 .cse12 .cse7 .cse4 .cse31) (and .cse17 .cse2 .cse29 .cse3 .cse4) (and .cse2 .cse32 .cse33 .cse3 .cse4) (and .cse22 .cse2 .cse12 .cse30 .cse34 .cse4) (and .cse25 .cse5 .cse9 .cse35 .cse4) (and .cse5 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 10)) .cse19 .cse12 .cse7 .cse4) (and .cse9 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 15)) .cse2 .cse4 .cse36) (and .cse24 .cse2 .cse12 .cse6 .cse4 .cse13) (and .cse37 .cse2 .cse12 .cse4 .cse21 .cse31) (and .cse38 .cse39 .cse2 .cse35 .cse12 .cse4) (and .cse26 .cse27 .cse2 .cse3 .cse4) (and (<= ULTIMATE.start_main_~c~0 11) .cse2 .cse35 .cse3 .cse4) (and .cse22 .cse9 .cse2 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 18)) .cse4) (and .cse2 .cse32 .cse12 .cse40 .cse33 .cse4) (and .cse9 .cse2 .cse28 .cse4 .cse23) (and .cse9 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 17)) .cse2 .cse35 .cse4) (and .cse38 .cse5 .cse12 .cse7 .cse4 .cse21) (and .cse39 .cse2 .cse12 .cse40 .cse4 .cse23) (and (<= ULTIMATE.start_main_~c~0 9) .cse2 .cse3 .cse4 .cse36) (and .cse8 .cse2 .cse12 .cse7 .cse4) (and .cse5 .cse12 .cse28 .cse7 .cse4 .cse23) (and (<= ULTIMATE.start_main_~c~0 (+ ~last~0 16)) .cse9 .cse19 .cse2 .cse4) (and .cse39 .cse2 .cse12 .cse4 .cse36 .cse41) (and .cse37 .cse2 .cse3 .cse4 .cse21) (and .cse5 .cse32 .cse33 .cse3 .cse4) (and .cse2 .cse14 .cse11 .cse3 .cse4) (and .cse0 .cse5 .cse12 .cse7 .cse4 .cse15) (and .cse5 .cse8 .cse12 .cse7 .cse4) (and .cse5 .cse14 .cse12 .cse11 .cse4 .cse41) (and .cse5 .cse32 .cse12 .cse40 .cse33 .cse4) (and .cse0 .cse1 .cse2 .cse12 .cse4 .cse15) (and (= ULTIMATE.start_main_~a~0 0) .cse5 .cse9 .cse34 .cse36)))) [2021-10-28 09:56:55,333 INFO L857 garLoopResultBuilder]: For program point L23-4(lines 21 31) no Hoare annotation was computed. [2021-10-28 09:56:55,334 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-28 09:56:55,334 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-28 09:56:55,334 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-28 09:56:55,334 INFO L857 garLoopResultBuilder]: For program point L28-1(lines 28 29) no Hoare annotation was computed. [2021-10-28 09:56:55,334 INFO L857 garLoopResultBuilder]: For program point L24(line 24) no Hoare annotation was computed. [2021-10-28 09:56:55,335 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-10-28 09:56:55,335 INFO L857 garLoopResultBuilder]: For program point L12(lines 12 14) no Hoare annotation was computed. [2021-10-28 09:56:55,335 INFO L853 garLoopResultBuilder]: At program point L12-2(lines 11 31) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~a~0))) (or (and (<= 200000 ULTIMATE.start_main_~c~0) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (< ULTIMATE.start_main_~c~0 200001) .cse0) (and (= ULTIMATE.start_main_~b~0 0) .cse0 (= ULTIMATE.start_main_~c~0 0)))) [2021-10-28 09:56:55,335 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-28 09:56:55,335 INFO L857 garLoopResultBuilder]: For program point L25-1(lines 21 31) no Hoare annotation was computed. [2021-10-28 09:56:55,336 INFO L857 garLoopResultBuilder]: For program point L13(line 13) no Hoare annotation was computed. [2021-10-28 09:56:55,336 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 32) no Hoare annotation was computed. [2021-10-28 09:56:55,338 INFO L731 BasicCegarLoop]: Path program histogram: [6, 6, 6, 3, 3, 2, 1, 1, 1] [2021-10-28 09:56:55,340 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:56:55,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:56:55 BoogieIcfgContainer [2021-10-28 09:56:55,382 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:56:55,382 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:56:55,383 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:56:55,383 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:56:55,383 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:47:45" (3/4) ... [2021-10-28 09:56:55,386 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 09:56:55,414 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-28 09:56:55,414 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 09:56:55,414 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:56:55,415 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:56:55,480 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:56:55,480 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:56:55,482 INFO L168 Benchmark]: Toolchain (without parser) took 550379.80 ms. Allocated memory was 104.9 MB in the beginning and 6.0 GB in the end (delta: 5.9 GB). Free memory was 74.7 MB in the beginning and 3.9 GB in the end (delta: -3.8 GB). Peak memory consumption was 2.1 GB. Max. memory is 16.1 GB. [2021-10-28 09:56:55,483 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 104.9 MB. Free memory is still 58.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:56:55,484 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.12 ms. Allocated memory was 104.9 MB in the beginning and 130.0 MB in the end (delta: 25.2 MB). Free memory was 74.7 MB in the beginning and 105.3 MB in the end (delta: -30.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:56:55,484 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.77 ms. Allocated memory is still 130.0 MB. Free memory was 105.3 MB in the beginning and 103.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:56:55,485 INFO L168 Benchmark]: Boogie Preprocessor took 19.50 ms. Allocated memory is still 130.0 MB. Free memory was 103.7 MB in the beginning and 102.7 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:56:55,485 INFO L168 Benchmark]: RCFGBuilder took 373.47 ms. Allocated memory is still 130.0 MB. Free memory was 102.7 MB in the beginning and 93.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:56:55,486 INFO L168 Benchmark]: TraceAbstraction took 549612.68 ms. Allocated memory was 130.0 MB in the beginning and 6.0 GB in the end (delta: 5.9 GB). Free memory was 92.7 MB in the beginning and 3.9 GB in the end (delta: -3.8 GB). Peak memory consumption was 4.4 GB. Max. memory is 16.1 GB. [2021-10-28 09:56:55,486 INFO L168 Benchmark]: Witness Printer took 98.25 ms. Allocated memory is still 6.0 GB. Free memory was 3.9 GB in the beginning and 3.9 GB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:56:55,491 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 104.9 MB. Free memory is still 58.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 240.12 ms. Allocated memory was 104.9 MB in the beginning and 130.0 MB in the end (delta: 25.2 MB). Free memory was 74.7 MB in the beginning and 105.3 MB in the end (delta: -30.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.77 ms. Allocated memory is still 130.0 MB. Free memory was 105.3 MB in the beginning and 103.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.50 ms. Allocated memory is still 130.0 MB. Free memory was 103.7 MB in the beginning and 102.7 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 373.47 ms. Allocated memory is still 130.0 MB. Free memory was 102.7 MB in the beginning and 93.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 549612.68 ms. Allocated memory was 130.0 MB in the beginning and 6.0 GB in the end (delta: 5.9 GB). Free memory was 92.7 MB in the beginning and 3.9 GB in the end (delta: -3.8 GB). Peak memory consumption was 4.4 GB. Max. memory is 16.1 GB. * Witness Printer took 98.25 ms. Allocated memory is still 6.0 GB. Free memory was 3.9 GB in the beginning and 3.9 GB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 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: 13]: 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, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 549.4s, OverallIterations: 29, TraceHistogramMax: 66, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 20.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 500.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 437 SDtfs, 3115 SDslu, 934 SDs, 0 SdLazy, 5681 SolverSat, 675 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3293 GetRequests, 2245 SyntacticMatches, 0 SemanticMatches, 1048 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68769 ImplicationChecksByTransitivity, 14.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4912occurred in iteration=28, InterpolantAutomatonStates: 1002, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.1s AutomataMinimizationTime, 29 MinimizatonAttempts, 8318 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 1969 NumberOfFragments, 1008 HoareAnnotationTreeSize, 2 FomulaSimplifications, 82151409592358781 FormulaSimplificationTreeSizeReduction, 369.9s HoareSimplificationTime, 2 FomulaSimplificationsInter, 512870058090589 FormulaSimplificationTreeSizeReductionInter, 130.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 12.2s InterpolantComputationTime, 4134 NumberOfCodeBlocks, 3536 NumberOfCodeBlocksAsserted, 146 NumberOfCheckSat, 4078 ConstructedInterpolants, 0 QuantifiedInterpolants, 10507 SizeOfPredicates, 57 NumberOfNonLiveVariables, 3487 ConjunctsInSsa, 334 ConjunctsInUnsatCore, 56 InterpolantComputations, 7 PerfectInterpolantSequences, 53187/65946 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: 11]: Loop Invariant Derived loop invariant: (((200000 <= c && 1 == cond) && c < 200001) && b == a) || ((b == 0 && b == a) && c == 0) - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((((((((((((((((((((((3 <= c && c <= 3) && 1 == cond) && st == 1) && b == a) || ((((b == 0 && 2 <= c) && c < 200001) && st == 1) && b == a)) || ((((13 <= c && 1 == cond) && c < 200001) && st == 1) && b == a)) || ((((last <= 2 && c <= last + 12) && 1 == cond) && 6 <= c) && b == a)) || (((((b == 0 && last + 1 <= c) && 2 <= c) && c < 200001) && b == a) && c <= last + 2)) || (((((1 == cond && c <= 6) && last + 1 <= c) && 6 <= c) && b == a) && c <= last + 3)) || (((1 == cond && st == 1) && b == a) && c == 0)) || ((((7 <= c && last <= 2) && c <= last + 13) && 1 == cond) && b == a)) || (((((7 <= c && b == 0) && c <= 7 + last) && last + 1 <= c) && c < 200001) && b == a)) || (((((c <= 7 + last && 10 <= c) && 1 == cond) && last + 1 <= c) && b == a) && c <= 10)) || ((((last <= 2 && 1 == cond) && c <= last + 14) && b == a) && 8 <= c)) || ((((b == 0 && 12 <= c) && last <= 2) && c <= last + 12) && b == a)) || ((((c <= 4 && 1 == cond) && st == 1) && b == a) && 4 <= c)) || ((((c <= 2 && 1 == cond) && 2 <= c) && st == 1) && b == a)) || (((((c <= last + 11 && 5 <= c) && c <= 5) && 1 == cond) && last + 1 <= c) && b == a)) || ((((10 <= c && 1 == cond) && st == 1) && b == a) && c <= 10)) || (((((7 <= c && 1 == cond) && last + 1 <= c) && c <= last + 4) && c <= 7) && b == a)) || ((((12 <= c && 1 == cond) && c <= 12) && st == 1) && b == a)) || (((b == 0 && st == 1) && b == a) && c == 0)) || (((((5 <= c && b == 0) && last + 1 <= c) && c < 200001) && b == a) && c <= last + 5)) || ((((7 <= c && 1 == cond) && c <= 7) && st == 1) && b == a)) || ((((1 == cond && 1 <= c) && c <= 1) && st == 1) && b == a)) || (((((12 <= c && 1 == cond) && last + 1 <= c) && c <= 12) && c <= last + 9) && b == a)) || ((((c <= last + 11 && b == 0) && last <= 2) && 11 <= c) && b == a)) || (((((b == 0 && c <= last + 10) && 10 <= c) && last + 1 <= c) && c < 200001) && b == a)) || ((((last <= 2 && c <= last + 15) && 1 == cond) && b == a) && 9 <= c)) || (((((c <= 2 && 1 == cond) && last + 1 <= c) && 2 <= c) && b == a) && c <= last + 2)) || (((((c <= 8 && 1 == cond) && last + 1 <= c) && b == a) && 8 <= c) && c <= last + 5)) || (((((c <= last + 8 && last <= 17) && 1 == cond) && 11 <= c) && last + 1 <= c) && b == a)) || ((((5 <= c && c <= 5) && 1 == cond) && st == 1) && b == a)) || ((((c <= 11 && 1 == cond) && 11 <= c) && st == 1) && b == a)) || ((((12 <= c && last <= 2) && 1 == cond) && c <= last + 18) && b == a)) || (((((1 == cond && 1 <= c) && last + 1 <= c) && c <= last + 1) && c <= 1) && b == a)) || ((((last <= 2 && 1 == cond) && c <= last + 4) && b == a) && 4 <= c)) || ((((last <= 2 && c <= last + 17) && 1 == cond) && 11 <= c) && b == a)) || (((((c <= last + 8 && b == 0) && last + 1 <= c) && c < 200001) && b == a) && 8 <= c)) || (((((last <= 17 && 1 == cond) && last + 1 <= c) && c <= last + 1) && b == a) && 4 <= c)) || ((((c <= 9 && 1 == cond) && st == 1) && b == a) && 9 <= c)) || ((((13 <= c && 1 == cond) && last + 1 <= c) && c < 200001) && b == a)) || (((((b == 0 && last + 1 <= c) && c <= last + 4) && c < 200001) && b == a) && 4 <= c)) || ((((c <= last + 16 && last <= 2) && 10 <= c) && 1 == cond) && b == a)) || (((((last <= 17 && 1 == cond) && last + 1 <= c) && b == a) && 9 <= c) && c <= last + 6)) || ((((c <= 8 && 1 == cond) && st == 1) && b == a) && 8 <= c)) || ((((b == 0 && 1 <= c) && c <= 1) && st == 1) && b == a)) || ((((1 == cond && c <= 6) && 6 <= c) && st == 1) && b == a)) || (((((3 <= c && b == 0) && last + 1 <= c) && c < 200001) && b == a) && c <= last + 3)) || ((((b == 0 && 13 <= c) && last + 1 <= c) && c < 200001) && b == a)) || (((((b == 0 && c <= 6) && last + 1 <= c) && 6 <= c) && b == a) && c <= last + 6)) || (((((b == 0 && 1 <= c) && last + 1 <= c) && c <= last + 1) && c <= 1) && b == a)) || (((((3 <= c && c <= 3) && 1 == cond) && last + 1 <= c) && b == a) && c <= last + 3)) || ((((a == 0 && b == 0) && last <= 2) && c <= last + 9) && 9 <= c) RESULT: Ultimate proved your program to be correct! [2021-10-28 09:56:55,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4982be6-6ece-490c-a134-6b5eb28db573/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...