./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Addition03-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Addition03-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF --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 2b4726bd085117d6d28f7ec87f442bbec9d0d87c17bc39b8147695c8c5a6ec7b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:30:16,867 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:30:16,871 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:30:16,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:30:16,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:30:16,937 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:30:16,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:30:16,943 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:30:16,946 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:30:16,949 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:30:16,951 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:30:16,953 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:30:16,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:30:16,960 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:30:16,962 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:30:16,967 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:30:16,970 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:30:16,979 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:30:16,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:30:16,988 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:30:16,997 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:30:16,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:30:17,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:30:17,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:30:17,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:30:17,009 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:30:17,010 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:30:17,011 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:30:17,012 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:30:17,013 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:30:17,014 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:30:17,015 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:30:17,016 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:30:17,018 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:30:17,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:30:17,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:30:17,021 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:30:17,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:30:17,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:30:17,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:30:17,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:30:17,025 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:30:17,055 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:30:17,056 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:30:17,056 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:30:17,056 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:30:17,057 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:30:17,058 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:30:17,059 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:30:17,059 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:30:17,059 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:30:17,060 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:30:17,060 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:30:17,060 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:30:17,061 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:30:17,061 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:30:17,061 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:30:17,061 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:30:17,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:30:17,062 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:30:17,062 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:30:17,063 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:30:17,063 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:30:17,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:30:17,064 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:30:17,064 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:30:17,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:30:17,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:30:17,065 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:30:17,065 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:30:17,066 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:30:17,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:30:17,066 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:30:17,066 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:30:17,067 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:30:17,067 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:30:17,067 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_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b4726bd085117d6d28f7ec87f442bbec9d0d87c17bc39b8147695c8c5a6ec7b [2021-11-20 07:30:17,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:30:17,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:30:17,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:30:17,484 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:30:17,484 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:30:17,487 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/recursive/Addition03-1.c [2021-11-20 07:30:17,601 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/data/407b0908e/89efdacff9e248bcbf9dadaf54b6e41a/FLAGcde91986b [2021-11-20 07:30:18,233 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:30:18,234 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/sv-benchmarks/c/recursive/Addition03-1.c [2021-11-20 07:30:18,243 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/data/407b0908e/89efdacff9e248bcbf9dadaf54b6e41a/FLAGcde91986b [2021-11-20 07:30:18,614 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/data/407b0908e/89efdacff9e248bcbf9dadaf54b6e41a [2021-11-20 07:30:18,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:30:18,619 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:30:18,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:30:18,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:30:18,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:30:18,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:30:18" (1/1) ... [2021-11-20 07:30:18,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65616016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:30:18, skipping insertion in model container [2021-11-20 07:30:18,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:30:18" (1/1) ... [2021-11-20 07:30:18,639 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:30:18,654 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:30:18,871 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/sv-benchmarks/c/recursive/Addition03-1.c[840,853] [2021-11-20 07:30:18,875 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:30:18,885 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:30:18,906 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/sv-benchmarks/c/recursive/Addition03-1.c[840,853] [2021-11-20 07:30:18,907 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:30:18,923 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:30:18,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:30:18 WrapperNode [2021-11-20 07:30:18,924 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:30:18,925 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:30:18,926 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:30:18,926 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:30:18,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:30:18" (1/1) ... [2021-11-20 07:30:18,946 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:30:18" (1/1) ... [2021-11-20 07:30:18,981 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 26 [2021-11-20 07:30:18,981 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:30:18,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:30:18,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:30:18,983 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:30:18,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:30:18" (1/1) ... [2021-11-20 07:30:18,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:30:18" (1/1) ... [2021-11-20 07:30:18,993 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:30:18" (1/1) ... [2021-11-20 07:30:18,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:30:18" (1/1) ... [2021-11-20 07:30:18,997 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:30:18" (1/1) ... [2021-11-20 07:30:19,013 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:30:18" (1/1) ... [2021-11-20 07:30:19,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:30:18" (1/1) ... [2021-11-20 07:30:19,016 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:30:19,017 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:30:19,018 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:30:19,018 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:30:19,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:30:18" (1/1) ... [2021-11-20 07:30:19,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:30:19,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:19,075 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:30:19,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:30:19,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:30:19,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:30:19,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:30:19,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:30:19,133 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2021-11-20 07:30:19,133 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2021-11-20 07:30:19,206 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:30:19,207 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:30:19,336 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:30:19,343 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:30:19,344 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 07:30:19,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:30:19 BoogieIcfgContainer [2021-11-20 07:30:19,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:30:19,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:30:19,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:30:19,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:30:19,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:30:18" (1/3) ... [2021-11-20 07:30:19,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18cb2147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:30:19, skipping insertion in model container [2021-11-20 07:30:19,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:30:18" (2/3) ... [2021-11-20 07:30:19,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18cb2147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:30:19, skipping insertion in model container [2021-11-20 07:30:19,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:30:19" (3/3) ... [2021-11-20 07:30:19,358 INFO L111 eAbstractionObserver]: Analyzing ICFG Addition03-1.c [2021-11-20 07:30:19,365 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:30:19,366 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:30:19,427 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:30:19,437 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 07:30:19,437 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:30:19,459 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:30:19,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 07:30:19,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:19,468 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:19,469 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:30:19,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:19,477 INFO L85 PathProgramCache]: Analyzing trace with hash -100249854, now seen corresponding path program 1 times [2021-11-20 07:30:19,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:19,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244529156] [2021-11-20 07:30:19,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:19,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:19,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:30:19,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:19,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:30:19,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:19,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244529156] [2021-11-20 07:30:19,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244529156] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:30:19,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:30:19,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:30:19,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123085419] [2021-11-20 07:30:19,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:30:19,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:30:19,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:19,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:30:19,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:30:19,839 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:30:20,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:20,021 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2021-11-20 07:30:20,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:30:20,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-20 07:30:20,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:20,039 INFO L225 Difference]: With dead ends: 32 [2021-11-20 07:30:20,040 INFO L226 Difference]: Without dead ends: 19 [2021-11-20 07:30:20,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:30:20,054 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:20,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 41 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:30:20,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-20 07:30:20,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-20 07:30:20,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:30:20,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-11-20 07:30:20,136 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2021-11-20 07:30:20,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:20,137 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-11-20 07:30:20,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:30:20,138 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-11-20 07:30:20,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 07:30:20,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:20,141 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:20,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:30:20,144 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:30:20,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:20,157 INFO L85 PathProgramCache]: Analyzing trace with hash -2083914533, now seen corresponding path program 1 times [2021-11-20 07:30:20,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:20,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298832250] [2021-11-20 07:30:20,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:20,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:20,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:30:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:20,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:30:20,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:20,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298832250] [2021-11-20 07:30:20,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298832250] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:30:20,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:30:20,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:30:20,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884457874] [2021-11-20 07:30:20,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:30:20,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:30:20,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:20,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:30:20,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:30:20,307 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:30:20,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:20,335 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2021-11-20 07:30:20,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:30:20,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-20 07:30:20,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:20,337 INFO L225 Difference]: With dead ends: 29 [2021-11-20 07:30:20,337 INFO L226 Difference]: Without dead ends: 21 [2021-11-20 07:30:20,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:30:20,341 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:20,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 37 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:30:20,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-20 07:30:20,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2021-11-20 07:30:20,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:30:20,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-20 07:30:20,351 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2021-11-20 07:30:20,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:20,352 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-20 07:30:20,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:30:20,352 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-20 07:30:20,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 07:30:20,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:20,354 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:20,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:30:20,355 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:30:20,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:20,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1402250658, now seen corresponding path program 1 times [2021-11-20 07:30:20,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:20,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806163540] [2021-11-20 07:30:20,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:20,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:20,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:20,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:30:20,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:20,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:20,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:30:20,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:20,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806163540] [2021-11-20 07:30:20,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806163540] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:30:20,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838660941] [2021-11-20 07:30:20,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:20,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:20,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:20,536 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:20,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:30:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:20,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:30:20,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:30:20,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:21,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:30:21,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838660941] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:30:21,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:30:21,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 12 [2021-11-20 07:30:21,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050213072] [2021-11-20 07:30:21,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:21,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:30:21,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:21,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:30:21,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:30:21,226 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 07:30:21,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:21,443 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2021-11-20 07:30:21,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:30:21,444 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 17 [2021-11-20 07:30:21,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:21,448 INFO L225 Difference]: With dead ends: 54 [2021-11-20 07:30:21,448 INFO L226 Difference]: Without dead ends: 34 [2021-11-20 07:30:21,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:30:21,455 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:21,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 62 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:30:21,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-20 07:30:21,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-11-20 07:30:21,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 07:30:21,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-11-20 07:30:21,481 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 17 [2021-11-20 07:30:21,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:21,481 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-11-20 07:30:21,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 07:30:21,483 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-11-20 07:30:21,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-20 07:30:21,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:21,489 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:21,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:30:21,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:21,705 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:30:21,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:21,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1901242716, now seen corresponding path program 2 times [2021-11-20 07:30:21,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:21,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093407752] [2021-11-20 07:30:21,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:21,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:21,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:30:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:21,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:21,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:21,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:21,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:21,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 07:30:22,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:22,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093407752] [2021-11-20 07:30:22,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093407752] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:30:22,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817789572] [2021-11-20 07:30:22,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:30:22,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:22,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:22,013 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:22,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:30:22,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:30:22,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:30:22,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 07:30:22,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:22,254 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 07:30:22,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:22,992 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:30:22,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817789572] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:30:22,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:30:22,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 16 [2021-11-20 07:30:22,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565530043] [2021-11-20 07:30:22,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:22,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 07:30:22,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:22,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 07:30:22,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:30:22,997 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-20 07:30:23,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:23,165 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2021-11-20 07:30:23,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:30:23,166 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 31 [2021-11-20 07:30:23,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:23,168 INFO L225 Difference]: With dead ends: 46 [2021-11-20 07:30:23,168 INFO L226 Difference]: Without dead ends: 40 [2021-11-20 07:30:23,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2021-11-20 07:30:23,171 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:23,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 64 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:30:23,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-20 07:30:23,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2021-11-20 07:30:23,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-20 07:30:23,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-11-20 07:30:23,193 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 31 [2021-11-20 07:30:23,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:23,193 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-11-20 07:30:23,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-20 07:30:23,194 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-11-20 07:30:23,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 07:30:23,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:23,196 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:23,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-20 07:30:23,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:23,397 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:30:23,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:23,402 INFO L85 PathProgramCache]: Analyzing trace with hash -2146751834, now seen corresponding path program 3 times [2021-11-20 07:30:23,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:23,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093572019] [2021-11-20 07:30:23,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:23,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:23,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:30:23,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:23,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:23,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:23,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:23,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:23,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:23,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:23,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:23,672 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-20 07:30:23,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:23,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093572019] [2021-11-20 07:30:23,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093572019] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:30:23,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649495575] [2021-11-20 07:30:23,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:30:23,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:23,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:23,674 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:23,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:30:23,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-20 07:30:23,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:30:23,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 07:30:23,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:23,935 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-20 07:30:23,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:25,445 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:30:25,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649495575] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:30:25,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:30:25,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 20 [2021-11-20 07:30:25,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318558478] [2021-11-20 07:30:25,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:25,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 07:30:25,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:25,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 07:30:25,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:30:25,452 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2021-11-20 07:30:25,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:25,688 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2021-11-20 07:30:25,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:30:25,689 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) Word has length 45 [2021-11-20 07:30:25,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:25,691 INFO L225 Difference]: With dead ends: 52 [2021-11-20 07:30:25,691 INFO L226 Difference]: Without dead ends: 46 [2021-11-20 07:30:25,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=251, Invalid=505, Unknown=0, NotChecked=0, Total=756 [2021-11-20 07:30:25,694 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 72 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:25,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 78 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:30:25,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-20 07:30:25,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2021-11-20 07:30:25,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 4 states have call successors, (4), 3 states have call predecessors, (4), 8 states have return successors, (12), 9 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-20 07:30:25,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2021-11-20 07:30:25,706 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 45 [2021-11-20 07:30:25,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:25,708 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2021-11-20 07:30:25,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2021-11-20 07:30:25,708 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2021-11-20 07:30:25,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 07:30:25,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:25,713 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:25,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:30:25,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:25,920 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:30:25,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:25,921 INFO L85 PathProgramCache]: Analyzing trace with hash -489684568, now seen corresponding path program 4 times [2021-11-20 07:30:25,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:25,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144505560] [2021-11-20 07:30:25,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:25,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:25,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:26,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:30:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:26,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:26,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:26,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:26,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:26,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:26,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:26,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:26,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:26,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:26,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:26,354 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-20 07:30:26,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:26,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144505560] [2021-11-20 07:30:26,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144505560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:30:26,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137248670] [2021-11-20 07:30:26,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:30:26,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:26,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:26,356 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:26,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:30:26,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:30:26,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:30:26,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 07:30:26,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:26,673 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-20 07:30:26,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 07:30:29,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137248670] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:30:29,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:30:29,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 24 [2021-11-20 07:30:29,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128877962] [2021-11-20 07:30:29,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:29,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 07:30:29,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:29,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 07:30:29,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-11-20 07:30:29,351 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (10), 1 states have call predecessors, (10), 10 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2021-11-20 07:30:29,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:29,652 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2021-11-20 07:30:29,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 07:30:29,653 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (10), 1 states have call predecessors, (10), 10 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) Word has length 59 [2021-11-20 07:30:29,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:29,656 INFO L225 Difference]: With dead ends: 58 [2021-11-20 07:30:29,656 INFO L226 Difference]: Without dead ends: 52 [2021-11-20 07:30:29,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=373, Invalid=749, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 07:30:29,658 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 163 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:29,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 99 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:30:29,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-20 07:30:29,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-11-20 07:30:29,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 4 states have call successors, (4), 3 states have call predecessors, (4), 10 states have return successors, (14), 11 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-20 07:30:29,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-11-20 07:30:29,680 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 59 [2021-11-20 07:30:29,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:29,683 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-11-20 07:30:29,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (10), 1 states have call predecessors, (10), 10 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2021-11-20 07:30:29,684 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-11-20 07:30:29,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-20 07:30:29,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:29,692 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:29,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:30:29,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:29,909 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:30:29,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:29,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1199719510, now seen corresponding path program 5 times [2021-11-20 07:30:29,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:29,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918054649] [2021-11-20 07:30:29,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:29,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:29,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:30:29,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:30,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:30,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:30,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:30,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:30,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:30,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:30,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:30,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:30,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:30,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:30,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:30,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:30,385 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-20 07:30:30,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:30,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918054649] [2021-11-20 07:30:30,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918054649] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:30:30,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485616864] [2021-11-20 07:30:30,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:30:30,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:30,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:30,389 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:30,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:30:30,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-20 07:30:30,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:30:30,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 07:30:30,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:30,822 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-20 07:30:30,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 07:30:35,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485616864] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:30:35,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:30:35,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 28 [2021-11-20 07:30:35,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004362826] [2021-11-20 07:30:35,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:35,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 07:30:35,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:35,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 07:30:35,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2021-11-20 07:30:35,242 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 12 states have call successors, (12), 1 states have call predecessors, (12), 12 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) [2021-11-20 07:30:35,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:35,598 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2021-11-20 07:30:35,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 07:30:35,599 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 12 states have call successors, (12), 1 states have call predecessors, (12), 12 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) Word has length 73 [2021-11-20 07:30:35,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:35,602 INFO L225 Difference]: With dead ends: 64 [2021-11-20 07:30:35,602 INFO L226 Difference]: Without dead ends: 58 [2021-11-20 07:30:35,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 07:30:35,606 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 184 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:35,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 104 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:30:35,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-20 07:30:35,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-11-20 07:30:35,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 4 states have call successors, (4), 3 states have call predecessors, (4), 12 states have return successors, (16), 13 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-20 07:30:35,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2021-11-20 07:30:35,626 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 73 [2021-11-20 07:30:35,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:35,627 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2021-11-20 07:30:35,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 12 states have call successors, (12), 1 states have call predecessors, (12), 12 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) [2021-11-20 07:30:35,628 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2021-11-20 07:30:35,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-20 07:30:35,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:35,630 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:35,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:30:35,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:35,857 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:30:35,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:35,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1560921940, now seen corresponding path program 6 times [2021-11-20 07:30:35,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:35,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664467643] [2021-11-20 07:30:35,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:35,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:35,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:30:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:36,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:36,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:36,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:36,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:36,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:36,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:36,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:36,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:36,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:36,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:36,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:36,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:36,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:36,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:36,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:36,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:36,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:36,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-11-20 07:30:36,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:36,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664467643] [2021-11-20 07:30:36,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664467643] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:30:36,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452947109] [2021-11-20 07:30:36,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:30:36,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:36,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:36,492 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:36,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:30:36,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-11-20 07:30:36,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:30:36,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 07:30:36,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:37,061 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-11-20 07:30:37,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:43,741 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 363 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-20 07:30:43,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452947109] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:30:43,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:30:43,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 32 [2021-11-20 07:30:43,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798353048] [2021-11-20 07:30:43,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:43,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 07:30:43,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:43,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 07:30:43,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2021-11-20 07:30:43,759 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 32 states have internal predecessors, (76), 14 states have call successors, (14), 1 states have call predecessors, (14), 14 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) [2021-11-20 07:30:44,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:44,186 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2021-11-20 07:30:44,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 07:30:44,187 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 32 states have internal predecessors, (76), 14 states have call successors, (14), 1 states have call predecessors, (14), 14 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) Word has length 87 [2021-11-20 07:30:44,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:44,194 INFO L225 Difference]: With dead ends: 70 [2021-11-20 07:30:44,194 INFO L226 Difference]: Without dead ends: 64 [2021-11-20 07:30:44,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=689, Invalid=1381, Unknown=0, NotChecked=0, Total=2070 [2021-11-20 07:30:44,201 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 231 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:44,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 120 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:30:44,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-20 07:30:44,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2021-11-20 07:30:44,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 4 states have call successors, (4), 3 states have call predecessors, (4), 14 states have return successors, (18), 15 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-20 07:30:44,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2021-11-20 07:30:44,225 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 87 [2021-11-20 07:30:44,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:44,228 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2021-11-20 07:30:44,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 32 states have internal predecessors, (76), 14 states have call successors, (14), 1 states have call predecessors, (14), 14 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) [2021-11-20 07:30:44,228 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2021-11-20 07:30:44,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-20 07:30:44,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:44,232 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:44,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:30:44,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:44,453 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:30:44,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:44,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1048271022, now seen corresponding path program 7 times [2021-11-20 07:30:44,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:44,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822218] [2021-11-20 07:30:44,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:44,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:44,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:44,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:30:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:44,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:44,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:44,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:44,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:44,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:44,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:44,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:44,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:44,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:44,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:45,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:45,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:45,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-11-20 07:30:45,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:45,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822218] [2021-11-20 07:30:45,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822218] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:30:45,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948209592] [2021-11-20 07:30:45,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:30:45,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:45,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:45,109 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:45,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:30:45,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:45,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-20 07:30:45,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:45,754 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-11-20 07:30:45,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-20 07:30:55,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948209592] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:30:55,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:30:55,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 31] total 36 [2021-11-20 07:30:55,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479379907] [2021-11-20 07:30:55,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:55,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-20 07:30:55,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:55,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-20 07:30:55,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=921, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 07:30:55,215 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 36 states have internal predecessors, (86), 16 states have call successors, (16), 1 states have call predecessors, (16), 16 states have return successors, (41), 16 states have call predecessors, (41), 16 states have call successors, (41) [2021-11-20 07:30:55,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:55,612 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2021-11-20 07:30:55,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 07:30:55,613 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 36 states have internal predecessors, (86), 16 states have call successors, (16), 1 states have call predecessors, (16), 16 states have return successors, (41), 16 states have call predecessors, (41), 16 states have call successors, (41) Word has length 101 [2021-11-20 07:30:55,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:55,616 INFO L225 Difference]: With dead ends: 76 [2021-11-20 07:30:55,617 INFO L226 Difference]: Without dead ends: 70 [2021-11-20 07:30:55,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=883, Invalid=1769, Unknown=0, NotChecked=0, Total=2652 [2021-11-20 07:30:55,623 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 196 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:55,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 135 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:30:55,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-20 07:30:55,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2021-11-20 07:30:55,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 16 states have return successors, (20), 17 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-20 07:30:55,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2021-11-20 07:30:55,646 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 101 [2021-11-20 07:30:55,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:55,648 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2021-11-20 07:30:55,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 36 states have internal predecessors, (86), 16 states have call successors, (16), 1 states have call predecessors, (16), 16 states have return successors, (41), 16 states have call predecessors, (41), 16 states have call successors, (41) [2021-11-20 07:30:55,649 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2021-11-20 07:30:55,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-20 07:30:55,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:55,651 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:55,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-20 07:30:55,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 07:30:55,877 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:30:55,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:55,878 INFO L85 PathProgramCache]: Analyzing trace with hash 2075065264, now seen corresponding path program 8 times [2021-11-20 07:30:55,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:55,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982464398] [2021-11-20 07:30:55,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:55,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:55,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:30:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:56,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:56,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:56,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:56,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:56,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:56,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:56,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:56,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:56,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:56,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:56,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:56,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:56,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:56,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:56,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:56,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:56,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:56,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:56,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:30:56,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:56,605 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2021-11-20 07:30:56,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:56,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982464398] [2021-11-20 07:30:56,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982464398] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:30:56,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91231907] [2021-11-20 07:30:56,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:30:56,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:56,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:56,609 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:56,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 07:30:57,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:30:57,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:30:57,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-20 07:30:57,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2021-11-20 07:30:57,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:31:11,681 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 675 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-20 07:31:11,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91231907] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:31:11,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:31:11,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 35] total 40 [2021-11-20 07:31:11,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253351030] [2021-11-20 07:31:11,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:31:11,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-20 07:31:11,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:31:11,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-20 07:31:11,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=1143, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 07:31:11,686 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 40 states, 40 states have (on average 2.4) internal successors, (96), 40 states have internal predecessors, (96), 18 states have call successors, (18), 1 states have call predecessors, (18), 18 states have return successors, (47), 18 states have call predecessors, (47), 18 states have call successors, (47) [2021-11-20 07:31:12,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:31:12,112 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2021-11-20 07:31:12,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 07:31:12,113 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 40 states have internal predecessors, (96), 18 states have call successors, (18), 1 states have call predecessors, (18), 18 states have return successors, (47), 18 states have call predecessors, (47), 18 states have call successors, (47) Word has length 115 [2021-11-20 07:31:12,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:31:12,114 INFO L225 Difference]: With dead ends: 82 [2021-11-20 07:31:12,115 INFO L226 Difference]: Without dead ends: 76 [2021-11-20 07:31:12,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1101, Invalid=2205, Unknown=0, NotChecked=0, Total=3306 [2021-11-20 07:31:12,118 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 315 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:31:12,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 148 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:31:12,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-20 07:31:12,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2021-11-20 07:31:12,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 51 states have internal predecessors, (56), 4 states have call successors, (4), 3 states have call predecessors, (4), 18 states have return successors, (22), 19 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-20 07:31:12,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2021-11-20 07:31:12,128 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 115 [2021-11-20 07:31:12,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:31:12,129 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2021-11-20 07:31:12,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 40 states have internal predecessors, (96), 18 states have call successors, (18), 1 states have call predecessors, (18), 18 states have return successors, (47), 18 states have call predecessors, (47), 18 states have call successors, (47) [2021-11-20 07:31:12,130 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2021-11-20 07:31:12,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-20 07:31:12,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:31:12,132 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:31:12,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:31:12,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 07:31:12,357 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:31:12,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:31:12,358 INFO L85 PathProgramCache]: Analyzing trace with hash -107806286, now seen corresponding path program 9 times [2021-11-20 07:31:12,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:31:12,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238403788] [2021-11-20 07:31:12,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:31:12,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:31:12,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:12,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:31:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:12,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:12,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:12,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:12,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:12,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:12,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:12,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:12,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:12,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:12,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:12,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:12,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:12,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:13,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:13,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:13,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:13,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:13,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:13,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:13,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:13,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:13,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2021-11-20 07:31:13,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:31:13,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238403788] [2021-11-20 07:31:13,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238403788] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:31:13,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563518385] [2021-11-20 07:31:13,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:31:13,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:31:13,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:31:13,325 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:31:13,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 07:31:14,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-20 07:31:14,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:31:14,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-20 07:31:14,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:31:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2021-11-20 07:31:14,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:31:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-20 07:31:34,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563518385] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:31:34,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:31:34,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 39] total 44 [2021-11-20 07:31:34,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546205174] [2021-11-20 07:31:34,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:31:34,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-20 07:31:34,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:31:34,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-20 07:31:34,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=1389, Unknown=0, NotChecked=0, Total=1892 [2021-11-20 07:31:34,037 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 44 states have internal predecessors, (106), 20 states have call successors, (20), 1 states have call predecessors, (20), 20 states have return successors, (53), 20 states have call predecessors, (53), 20 states have call successors, (53) [2021-11-20 07:31:34,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:31:34,524 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2021-11-20 07:31:34,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:31:34,524 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 44 states have internal predecessors, (106), 20 states have call successors, (20), 1 states have call predecessors, (20), 20 states have return successors, (53), 20 states have call predecessors, (53), 20 states have call successors, (53) Word has length 129 [2021-11-20 07:31:34,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:31:34,526 INFO L225 Difference]: With dead ends: 88 [2021-11-20 07:31:34,526 INFO L226 Difference]: Without dead ends: 82 [2021-11-20 07:31:34,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1343, Invalid=2689, Unknown=0, NotChecked=0, Total=4032 [2021-11-20 07:31:34,529 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 389 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:31:34,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 174 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:31:34,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-20 07:31:34,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-11-20 07:31:34,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 4 states have call successors, (4), 3 states have call predecessors, (4), 20 states have return successors, (24), 21 states have call predecessors, (24), 4 states have call successors, (24) [2021-11-20 07:31:34,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2021-11-20 07:31:34,539 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 129 [2021-11-20 07:31:34,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:31:34,540 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2021-11-20 07:31:34,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 44 states have internal predecessors, (106), 20 states have call successors, (20), 1 states have call predecessors, (20), 20 states have return successors, (53), 20 states have call predecessors, (53), 20 states have call successors, (53) [2021-11-20 07:31:34,541 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2021-11-20 07:31:34,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-20 07:31:34,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:31:34,544 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:31:34,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:31:34,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 07:31:34,757 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:31:34,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:31:34,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1602833076, now seen corresponding path program 10 times [2021-11-20 07:31:34,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:31:34,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715959598] [2021-11-20 07:31:34,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:31:34,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:31:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:34,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:31:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:34,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:35,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:35,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:35,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:35,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:35,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:35,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:35,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:35,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:35,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:35,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:35,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:35,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:35,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:35,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:35,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:35,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:35,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:35,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:35,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:35,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:35,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:35,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:35,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:35,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:35,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:35,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:35,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:35,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:31:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2021-11-20 07:31:35,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:31:35,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715959598] [2021-11-20 07:31:35,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715959598] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:31:35,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933171797] [2021-11-20 07:31:35,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:31:35,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:31:35,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:31:35,853 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:31:35,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 07:31:37,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:31:37,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:31:37,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-20 07:31:37,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:31:37,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2021-11-20 07:31:37,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:32:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 0 proven. 1083 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-20 07:32:04,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933171797] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:32:04,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:32:04,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 43] total 48 [2021-11-20 07:32:04,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890911585] [2021-11-20 07:32:04,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:32:04,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-20 07:32:04,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:32:04,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-20 07:32:04,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=1659, Unknown=0, NotChecked=0, Total=2256 [2021-11-20 07:32:04,524 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 48 states, 48 states have (on average 2.4166666666666665) internal successors, (116), 48 states have internal predecessors, (116), 22 states have call successors, (22), 1 states have call predecessors, (22), 22 states have return successors, (59), 22 states have call predecessors, (59), 22 states have call successors, (59) [2021-11-20 07:32:04,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:32:04,917 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2021-11-20 07:32:04,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 07:32:04,918 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.4166666666666665) internal successors, (116), 48 states have internal predecessors, (116), 22 states have call successors, (22), 1 states have call predecessors, (22), 22 states have return successors, (59), 22 states have call predecessors, (59), 22 states have call successors, (59) Word has length 143 [2021-11-20 07:32:04,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:32:04,919 INFO L225 Difference]: With dead ends: 94 [2021-11-20 07:32:04,920 INFO L226 Difference]: Without dead ends: 88 [2021-11-20 07:32:04,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1609, Invalid=3221, Unknown=0, NotChecked=0, Total=4830 [2021-11-20 07:32:04,922 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 162 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:32:04,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 168 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:32:04,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-20 07:32:04,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2021-11-20 07:32:04,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 4 states have call successors, (4), 3 states have call predecessors, (4), 22 states have return successors, (26), 23 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-20 07:32:04,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2021-11-20 07:32:04,934 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 143 [2021-11-20 07:32:04,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:32:04,934 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2021-11-20 07:32:04,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.4166666666666665) internal successors, (116), 48 states have internal predecessors, (116), 22 states have call successors, (22), 1 states have call predecessors, (22), 22 states have return successors, (59), 22 states have call predecessors, (59), 22 states have call successors, (59) [2021-11-20 07:32:04,935 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2021-11-20 07:32:04,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-20 07:32:04,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:32:04,939 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:32:04,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:32:05,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:32:05,165 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:32:05,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:32:05,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1219250506, now seen corresponding path program 11 times [2021-11-20 07:32:05,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:32:05,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115976847] [2021-11-20 07:32:05,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:32:05,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:32:05,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:05,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:32:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:05,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:05,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:05,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:05,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:05,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:05,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:05,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:05,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:05,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:05,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:05,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:05,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:05,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:05,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:06,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:06,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:06,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:06,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:06,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:06,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:06,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:06,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:06,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:06,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:06,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:06,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:06,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2021-11-20 07:32:06,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:32:06,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115976847] [2021-11-20 07:32:06,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115976847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:32:06,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901768702] [2021-11-20 07:32:06,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:32:06,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:32:06,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:32:06,360 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:32:06,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 07:32:07,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-11-20 07:32:07,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:32:07,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-20 07:32:07,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:32:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2021-11-20 07:32:08,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:32:45,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 1323 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-20 07:32:45,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901768702] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:32:45,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:32:45,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 47] total 52 [2021-11-20 07:32:45,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616338533] [2021-11-20 07:32:45,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:32:45,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-20 07:32:45,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:32:45,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-20 07:32:45,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=699, Invalid=1953, Unknown=0, NotChecked=0, Total=2652 [2021-11-20 07:32:45,875 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 52 states, 52 states have (on average 2.423076923076923) internal successors, (126), 52 states have internal predecessors, (126), 24 states have call successors, (24), 1 states have call predecessors, (24), 24 states have return successors, (65), 24 states have call predecessors, (65), 24 states have call successors, (65) [2021-11-20 07:32:46,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:32:46,400 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2021-11-20 07:32:46,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 07:32:46,401 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.423076923076923) internal successors, (126), 52 states have internal predecessors, (126), 24 states have call successors, (24), 1 states have call predecessors, (24), 24 states have return successors, (65), 24 states have call predecessors, (65), 24 states have call successors, (65) Word has length 157 [2021-11-20 07:32:46,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:32:46,403 INFO L225 Difference]: With dead ends: 100 [2021-11-20 07:32:46,403 INFO L226 Difference]: Without dead ends: 94 [2021-11-20 07:32:46,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1630 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1899, Invalid=3801, Unknown=0, NotChecked=0, Total=5700 [2021-11-20 07:32:46,407 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 72 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:32:46,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 190 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:32:46,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-20 07:32:46,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2021-11-20 07:32:46,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 63 states have internal predecessors, (68), 4 states have call successors, (4), 3 states have call predecessors, (4), 24 states have return successors, (28), 25 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-20 07:32:46,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2021-11-20 07:32:46,418 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 157 [2021-11-20 07:32:46,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:32:46,419 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2021-11-20 07:32:46,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.423076923076923) internal successors, (126), 52 states have internal predecessors, (126), 24 states have call successors, (24), 1 states have call predecessors, (24), 24 states have return successors, (65), 24 states have call predecessors, (65), 24 states have call successors, (65) [2021-11-20 07:32:46,420 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2021-11-20 07:32:46,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-20 07:32:46,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:32:46,423 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:32:46,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:32:46,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:32:46,637 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:32:46,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:32:46,637 INFO L85 PathProgramCache]: Analyzing trace with hash -954980936, now seen corresponding path program 12 times [2021-11-20 07:32:46,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:32:46,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225679662] [2021-11-20 07:32:46,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:32:46,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:32:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:46,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:32:46,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:46,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:46,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:46,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:47,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:47,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:47,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:47,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:47,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:47,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:47,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:47,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:47,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:47,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:47,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:47,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:47,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:47,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:47,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:47,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:47,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:47,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:47,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:47,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:47,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:47,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:47,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:47,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:47,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:47,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:47,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:47,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:48,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:32:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:48,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2021-11-20 07:32:48,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:32:48,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225679662] [2021-11-20 07:32:48,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225679662] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:32:48,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622361857] [2021-11-20 07:32:48,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:32:48,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:32:48,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:32:48,061 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:32:48,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 07:32:49,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-11-20 07:32:49,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:32:50,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-20 07:32:50,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:32:50,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2021-11-20 07:32:50,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:33:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 1587 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-20 07:33:40,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622361857] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:33:40,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:33:40,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 51] total 56 [2021-11-20 07:33:40,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377431738] [2021-11-20 07:33:40,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:33:40,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-20 07:33:40,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:33:40,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-20 07:33:40,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=809, Invalid=2271, Unknown=0, NotChecked=0, Total=3080 [2021-11-20 07:33:40,133 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 56 states, 56 states have (on average 2.4285714285714284) internal successors, (136), 56 states have internal predecessors, (136), 26 states have call successors, (26), 1 states have call predecessors, (26), 26 states have return successors, (71), 26 states have call predecessors, (71), 26 states have call successors, (71) [2021-11-20 07:33:40,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:33:40,736 INFO L93 Difference]: Finished difference Result 106 states and 117 transitions. [2021-11-20 07:33:40,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-20 07:33:40,737 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.4285714285714284) internal successors, (136), 56 states have internal predecessors, (136), 26 states have call successors, (26), 1 states have call predecessors, (26), 26 states have return successors, (71), 26 states have call predecessors, (71), 26 states have call successors, (71) Word has length 171 [2021-11-20 07:33:40,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:33:40,739 INFO L225 Difference]: With dead ends: 106 [2021-11-20 07:33:40,739 INFO L226 Difference]: Without dead ends: 100 [2021-11-20 07:33:40,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2213, Invalid=4429, Unknown=0, NotChecked=0, Total=6642 [2021-11-20 07:33:40,743 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 464 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:33:40,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 201 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:33:40,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-20 07:33:40,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2021-11-20 07:33:40,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 4 states have call successors, (4), 3 states have call predecessors, (4), 26 states have return successors, (30), 27 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-20 07:33:40,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2021-11-20 07:33:40,753 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 171 [2021-11-20 07:33:40,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:33:40,754 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2021-11-20 07:33:40,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.4285714285714284) internal successors, (136), 56 states have internal predecessors, (136), 26 states have call successors, (26), 1 states have call predecessors, (26), 26 states have return successors, (71), 26 states have call predecessors, (71), 26 states have call successors, (71) [2021-11-20 07:33:40,755 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2021-11-20 07:33:40,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-20 07:33:40,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:33:40,759 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:33:40,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 07:33:40,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 07:33:40,985 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:33:40,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:33:40,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1800173498, now seen corresponding path program 13 times [2021-11-20 07:33:40,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:33:40,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141739243] [2021-11-20 07:33:40,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:33:40,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:33:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:41,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:33:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:41,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:33:41,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:41,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:33:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:41,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:33:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:41,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:33:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:41,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:33:41,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:41,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:33:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:41,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:33:41,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:41,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:33:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:41,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:33:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:41,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:33:41,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:41,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:33:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:42,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:33:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:42,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:33:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:42,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:33:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:42,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:33:42,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:42,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:33:42,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:42,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:33:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:42,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:33:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:42,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:33:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:42,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:33:42,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:42,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:33:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:42,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:33:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:42,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:33:42,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:42,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:33:42,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:42,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:33:42,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:42,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2021-11-20 07:33:42,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:33:42,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141739243] [2021-11-20 07:33:42,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141739243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:33:42,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765639579] [2021-11-20 07:33:42,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:33:42,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:33:42,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:33:42,609 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:33:42,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 07:33:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:33:45,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-20 07:33:45,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:33:45,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2021-11-20 07:33:45,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:34:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 0 proven. 1875 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-20 07:34:49,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765639579] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:34:49,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:34:49,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 55] total 60 [2021-11-20 07:34:49,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076849131] [2021-11-20 07:34:49,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:34:49,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-20 07:34:49,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:49,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-20 07:34:49,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=927, Invalid=2613, Unknown=0, NotChecked=0, Total=3540 [2021-11-20 07:34:49,628 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand has 60 states, 60 states have (on average 2.433333333333333) internal successors, (146), 60 states have internal predecessors, (146), 28 states have call successors, (28), 1 states have call predecessors, (28), 28 states have return successors, (77), 28 states have call predecessors, (77), 28 states have call successors, (77) [2021-11-20 07:34:50,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:50,415 INFO L93 Difference]: Finished difference Result 112 states and 123 transitions. [2021-11-20 07:34:50,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-20 07:34:50,416 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.433333333333333) internal successors, (146), 60 states have internal predecessors, (146), 28 states have call successors, (28), 1 states have call predecessors, (28), 28 states have return successors, (77), 28 states have call predecessors, (77), 28 states have call successors, (77) Word has length 185 [2021-11-20 07:34:50,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:50,418 INFO L225 Difference]: With dead ends: 112 [2021-11-20 07:34:50,418 INFO L226 Difference]: Without dead ends: 106 [2021-11-20 07:34:50,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2238 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2551, Invalid=5105, Unknown=0, NotChecked=0, Total=7656 [2021-11-20 07:34:50,422 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 854 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:50,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [882 Valid, 222 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:34:50,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-20 07:34:50,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2021-11-20 07:34:50,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 71 states have internal predecessors, (76), 4 states have call successors, (4), 3 states have call predecessors, (4), 28 states have return successors, (32), 29 states have call predecessors, (32), 4 states have call successors, (32) [2021-11-20 07:34:50,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2021-11-20 07:34:50,432 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 185 [2021-11-20 07:34:50,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:50,433 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2021-11-20 07:34:50,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.433333333333333) internal successors, (146), 60 states have internal predecessors, (146), 28 states have call successors, (28), 1 states have call predecessors, (28), 28 states have return successors, (77), 28 states have call predecessors, (77), 28 states have call successors, (77) [2021-11-20 07:34:50,434 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2021-11-20 07:34:50,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-20 07:34:50,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:50,436 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:34:50,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 07:34:50,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 07:34:50,649 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:34:50,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:50,649 INFO L85 PathProgramCache]: Analyzing trace with hash -253850436, now seen corresponding path program 14 times [2021-11-20 07:34:50,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:50,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376082947] [2021-11-20 07:34:50,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:50,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:50,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:50,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:34:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:50,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:34:50,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:50,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:34:51,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:51,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:34:51,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:51,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:34:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:51,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:34:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:51,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:34:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:51,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:34:51,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:51,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:34:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:51,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:34:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:51,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:34:51,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:51,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:34:51,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:51,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:34:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:51,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:34:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:51,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:34:51,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:51,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:34:51,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:51,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:34:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:52,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:34:52,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:52,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:34:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:52,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:34:52,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:52,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:34:52,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:52,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:34:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:52,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:34:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:52,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:34:52,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:52,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:34:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:52,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:34:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:52,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:34:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:52,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:34:52,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1458 trivial. 0 not checked. [2021-11-20 07:34:52,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:52,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376082947] [2021-11-20 07:34:52,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376082947] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:34:52,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429507921] [2021-11-20 07:34:52,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:34:52,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:52,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:34:52,461 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:34:52,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 07:34:55,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:34:55,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:34:55,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-20 07:34:55,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:34:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1458 trivial. 0 not checked. [2021-11-20 07:34:56,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:36:15,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 0 proven. 2187 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-20 07:36:15,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429507921] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:36:15,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:36:15,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 59] total 64 [2021-11-20 07:36:15,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673910483] [2021-11-20 07:36:15,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:36:15,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-20 07:36:15,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:36:15,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-20 07:36:15,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=2979, Unknown=0, NotChecked=0, Total=4032 [2021-11-20 07:36:15,702 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand has 64 states, 64 states have (on average 2.4375) internal successors, (156), 64 states have internal predecessors, (156), 30 states have call successors, (30), 1 states have call predecessors, (30), 30 states have return successors, (83), 30 states have call predecessors, (83), 30 states have call successors, (83) [2021-11-20 07:36:16,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:36:16,365 INFO L93 Difference]: Finished difference Result 118 states and 129 transitions. [2021-11-20 07:36:16,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-20 07:36:16,366 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.4375) internal successors, (156), 64 states have internal predecessors, (156), 30 states have call successors, (30), 1 states have call predecessors, (30), 30 states have return successors, (83), 30 states have call predecessors, (83), 30 states have call successors, (83) Word has length 199 [2021-11-20 07:36:16,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:36:16,368 INFO L225 Difference]: With dead ends: 118 [2021-11-20 07:36:16,368 INFO L226 Difference]: Without dead ends: 112 [2021-11-20 07:36:16,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2578 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2913, Invalid=5829, Unknown=0, NotChecked=0, Total=8742 [2021-11-20 07:36:16,371 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 688 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:36:16,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 234 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:36:16,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-20 07:36:16,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2021-11-20 07:36:16,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 75 states have internal predecessors, (80), 4 states have call successors, (4), 3 states have call predecessors, (4), 30 states have return successors, (34), 31 states have call predecessors, (34), 4 states have call successors, (34) [2021-11-20 07:36:16,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2021-11-20 07:36:16,378 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 199 [2021-11-20 07:36:16,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:36:16,379 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2021-11-20 07:36:16,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.4375) internal successors, (156), 64 states have internal predecessors, (156), 30 states have call successors, (30), 1 states have call predecessors, (30), 30 states have return successors, (83), 30 states have call predecessors, (83), 30 states have call successors, (83) [2021-11-20 07:36:16,380 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2021-11-20 07:36:16,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-20 07:36:16,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:36:16,381 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:36:16,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 07:36:16,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 07:36:16,596 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:36:16,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:36:16,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1863075006, now seen corresponding path program 15 times [2021-11-20 07:36:16,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:36:16,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607203418] [2021-11-20 07:36:16,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:36:16,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:36:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:16,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:36:16,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:16,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:36:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:16,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:36:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:16,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:36:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:17,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:36:17,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:17,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:36:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:17,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:36:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:17,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:36:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:17,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:36:17,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:17,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:36:17,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:17,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:36:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:17,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:36:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:17,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:36:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:17,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:36:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:17,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:36:17,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:17,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:36:17,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:17,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:36:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:17,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:36:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:17,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:36:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:17,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:36:17,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:17,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:36:17,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:17,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:36:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:17,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:36:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:18,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:36:18,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:18,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:36:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:18,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:36:18,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:18,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:36:18,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:18,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:36:18,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:18,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:36:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:18,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:36:18,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2958 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2021-11-20 07:36:18,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:36:18,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607203418] [2021-11-20 07:36:18,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607203418] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:36:18,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935097498] [2021-11-20 07:36:18,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:36:18,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:36:18,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:36:18,257 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:36:18,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 07:36:22,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-11-20 07:36:22,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:36:22,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-20 07:36:22,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:36:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2958 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2021-11-20 07:36:22,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:37:44,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2958 backedges. 0 proven. 2523 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-20 07:37:44,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935097498] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:37:44,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:37:44,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 63] total 68 [2021-11-20 07:37:44,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845666356] [2021-11-20 07:37:44,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:37:44,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-20 07:37:44,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:44,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-20 07:37:44,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1187, Invalid=3369, Unknown=0, NotChecked=0, Total=4556 [2021-11-20 07:37:44,429 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand has 68 states, 68 states have (on average 2.4411764705882355) internal successors, (166), 68 states have internal predecessors, (166), 32 states have call successors, (32), 1 states have call predecessors, (32), 32 states have return successors, (89), 32 states have call predecessors, (89), 32 states have call successors, (89) [2021-11-20 07:37:45,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:45,004 INFO L93 Difference]: Finished difference Result 124 states and 135 transitions. [2021-11-20 07:37:45,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-20 07:37:45,004 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.4411764705882355) internal successors, (166), 68 states have internal predecessors, (166), 32 states have call successors, (32), 1 states have call predecessors, (32), 32 states have return successors, (89), 32 states have call predecessors, (89), 32 states have call successors, (89) Word has length 213 [2021-11-20 07:37:45,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:45,005 INFO L225 Difference]: With dead ends: 124 [2021-11-20 07:37:45,006 INFO L226 Difference]: Without dead ends: 118 [2021-11-20 07:37:45,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2942 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3299, Invalid=6601, Unknown=0, NotChecked=0, Total=9900 [2021-11-20 07:37:45,007 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 550 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:45,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 241 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:37:45,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-20 07:37:45,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2021-11-20 07:37:45,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 79 states have internal predecessors, (84), 4 states have call successors, (4), 3 states have call predecessors, (4), 32 states have return successors, (36), 33 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-20 07:37:45,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 124 transitions. [2021-11-20 07:37:45,015 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 124 transitions. Word has length 213 [2021-11-20 07:37:45,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:45,015 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 124 transitions. [2021-11-20 07:37:45,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.4411764705882355) internal successors, (166), 68 states have internal predecessors, (166), 32 states have call successors, (32), 1 states have call predecessors, (32), 32 states have return successors, (89), 32 states have call predecessors, (89), 32 states have call successors, (89) [2021-11-20 07:37:45,016 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 124 transitions. [2021-11-20 07:37:45,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-11-20 07:37:45,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:45,018 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:37:45,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-20 07:37:45,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 07:37:45,241 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:37:45,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:45,241 INFO L85 PathProgramCache]: Analyzing trace with hash 561479616, now seen corresponding path program 16 times [2021-11-20 07:37:45,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:45,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485191219] [2021-11-20 07:37:45,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:45,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:45,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:37:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:45,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:45,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:45,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:45,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:45,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:45,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:45,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:45,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:45,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:45,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:45,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:46,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:46,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:46,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:46,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:46,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:46,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:46,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:46,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:46,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:46,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:46,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:46,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:46,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:46,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:46,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:46,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:46,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:46,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:46,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:46,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:46,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:46,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:46,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:46,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:46,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:46,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:46,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:47,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:47,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:47,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:47,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:47,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:37:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:47,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3379 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1922 trivial. 0 not checked. [2021-11-20 07:37:47,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:47,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485191219] [2021-11-20 07:37:47,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485191219] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:37:47,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677194187] [2021-11-20 07:37:47,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:37:47,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:37:47,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:37:47,125 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:37:47,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 07:37:51,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:37:51,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:37:51,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-20 07:37:51,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:37:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3379 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1922 trivial. 0 not checked. [2021-11-20 07:37:52,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:39:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3379 backedges. 0 proven. 2883 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-11-20 07:39:36,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677194187] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:39:36,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:39:36,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 67] total 72 [2021-11-20 07:39:36,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59319587] [2021-11-20 07:39:36,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:39:36,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-20 07:39:36,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:39:36,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-20 07:39:36,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1329, Invalid=3783, Unknown=0, NotChecked=0, Total=5112 [2021-11-20 07:39:36,557 INFO L87 Difference]: Start difference. First operand 116 states and 124 transitions. Second operand has 72 states, 72 states have (on average 2.4444444444444446) internal successors, (176), 72 states have internal predecessors, (176), 34 states have call successors, (34), 1 states have call predecessors, (34), 34 states have return successors, (95), 34 states have call predecessors, (95), 34 states have call successors, (95) [2021-11-20 07:39:37,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:39:37,466 INFO L93 Difference]: Finished difference Result 130 states and 141 transitions. [2021-11-20 07:39:37,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-20 07:39:37,467 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.4444444444444446) internal successors, (176), 72 states have internal predecessors, (176), 34 states have call successors, (34), 1 states have call predecessors, (34), 34 states have return successors, (95), 34 states have call predecessors, (95), 34 states have call successors, (95) Word has length 227 [2021-11-20 07:39:37,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:39:37,469 INFO L225 Difference]: With dead ends: 130 [2021-11-20 07:39:37,469 INFO L226 Difference]: Without dead ends: 124 [2021-11-20 07:39:37,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3330 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3709, Invalid=7421, Unknown=0, NotChecked=0, Total=11130 [2021-11-20 07:39:37,471 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1690 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 879 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1724 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 879 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:39:37,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1724 Valid, 279 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [879 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:39:37,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-20 07:39:37,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2021-11-20 07:39:37,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 83 states have internal predecessors, (88), 4 states have call successors, (4), 3 states have call predecessors, (4), 34 states have return successors, (38), 35 states have call predecessors, (38), 4 states have call successors, (38) [2021-11-20 07:39:37,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 130 transitions. [2021-11-20 07:39:37,479 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 130 transitions. Word has length 227 [2021-11-20 07:39:37,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:39:37,480 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 130 transitions. [2021-11-20 07:39:37,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.4444444444444446) internal successors, (176), 72 states have internal predecessors, (176), 34 states have call successors, (34), 1 states have call predecessors, (34), 34 states have return successors, (95), 34 states have call predecessors, (95), 34 states have call successors, (95) [2021-11-20 07:39:37,481 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 130 transitions. [2021-11-20 07:39:37,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-11-20 07:39:37,482 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:39:37,483 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:39:37,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-20 07:39:37,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:39:37,697 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:39:37,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:39:37,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1037951550, now seen corresponding path program 17 times [2021-11-20 07:39:37,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:39:37,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039056117] [2021-11-20 07:39:37,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:39:37,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:39:37,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:37,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:39:37,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:37,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:37,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:38,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:38,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:38,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:38,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:38,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:38,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:38,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:38,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:38,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:38,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:38,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:38,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:38,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:38,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:38,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:38,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:38,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:38,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:38,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:38,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:39,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:39,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:39,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:39,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:39,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:39,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:39,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:39,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:39,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:39,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:39,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:39,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:39,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:39,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:39,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:39,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:39,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:39,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:39,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:39,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:39,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:39,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:39,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:39,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:39,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:39,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:39,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 07:39:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:39,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 2178 trivial. 0 not checked. [2021-11-20 07:39:39,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:39:39,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039056117] [2021-11-20 07:39:39,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039056117] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:39:39,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942801625] [2021-11-20 07:39:39,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:39:39,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:39:39,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:39:39,634 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:39:39,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b1c2812-c5e7-46c3-891e-dcf7fc0dda87/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 07:39:45,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-11-20 07:39:45,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:39:45,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-20 07:39:45,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:39:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 2178 trivial. 0 not checked. [2021-11-20 07:39:46,257 INFO L328 TraceCheckSpWp]: Computing backward predicates...