./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label25.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_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/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_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label25.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/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_1e1c88d9-814f-4a2e-9666-1b986be75ea3/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 6036572cc480aba1617ffcf5de0f96e18071f7d06d6847cfbda5ebab0921c496 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:15:37,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:15:37,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:15:37,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:15:37,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:15:37,858 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:15:37,861 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:15:37,866 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:15:37,869 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:15:37,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:15:37,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:15:37,879 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:15:37,879 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:15:37,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:15:37,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:15:37,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:15:37,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:15:37,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:15:37,902 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:15:37,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:15:37,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:15:37,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:15:37,918 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:15:37,919 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:15:37,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:15:37,927 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:15:37,927 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:15:37,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:15:37,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:15:37,932 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:15:37,933 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:15:37,935 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:15:37,937 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:15:37,938 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:15:37,941 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:15:37,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:15:37,942 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:15:37,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:15:37,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:15:37,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:15:37,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:15:37,945 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:15:37,993 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:15:37,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:15:37,994 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:15:37,994 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:15:37,994 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:15:37,995 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:15:37,995 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:15:37,995 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:15:37,995 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:15:37,995 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:15:37,996 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:15:37,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:15:37,996 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:15:37,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:15:37,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:15:37,997 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:15:37,997 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:15:37,997 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:15:37,997 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:15:37,997 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:15:37,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:15:37,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:15:37,998 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:15:37,998 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:15:37,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:15:37,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:15:37,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:15:37,998 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:15:37,999 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:15:37,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:15:37,999 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:15:37,999 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:15:37,999 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:15:37,999 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:15:38,000 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_1e1c88d9-814f-4a2e-9666-1b986be75ea3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6036572cc480aba1617ffcf5de0f96e18071f7d06d6847cfbda5ebab0921c496 [2021-11-20 07:15:38,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:15:38,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:15:38,414 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:15:38,415 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:15:38,416 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:15:38,419 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/eca-rers2012/Problem03_label25.c [2021-11-20 07:15:38,524 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/data/543de53d9/3c2cdcbd13ef4edb97adc989d017c513/FLAG01a19ee08 [2021-11-20 07:15:39,365 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:15:39,366 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/sv-benchmarks/c/eca-rers2012/Problem03_label25.c [2021-11-20 07:15:39,395 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/data/543de53d9/3c2cdcbd13ef4edb97adc989d017c513/FLAG01a19ee08 [2021-11-20 07:15:39,459 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/data/543de53d9/3c2cdcbd13ef4edb97adc989d017c513 [2021-11-20 07:15:39,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:15:39,464 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:15:39,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:15:39,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:15:39,471 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:15:39,472 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:15:39" (1/1) ... [2021-11-20 07:15:39,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c10b208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:15:39, skipping insertion in model container [2021-11-20 07:15:39,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:15:39" (1/1) ... [2021-11-20 07:15:39,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:15:39,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:15:40,377 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_1e1c88d9-814f-4a2e-9666-1b986be75ea3/sv-benchmarks/c/eca-rers2012/Problem03_label25.c[58529,58542] [2021-11-20 07:15:40,441 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:15:40,451 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:15:40,809 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_1e1c88d9-814f-4a2e-9666-1b986be75ea3/sv-benchmarks/c/eca-rers2012/Problem03_label25.c[58529,58542] [2021-11-20 07:15:40,825 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:15:40,848 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:15:40,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:15:40 WrapperNode [2021-11-20 07:15:40,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:15:40,851 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:15:40,851 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:15:40,851 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:15:40,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:15:40" (1/1) ... [2021-11-20 07:15:40,919 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:15:40" (1/1) ... [2021-11-20 07:15:41,005 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-11-20 07:15:41,006 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:15:41,007 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:15:41,007 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:15:41,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:15:41,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:15:40" (1/1) ... [2021-11-20 07:15:41,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:15:40" (1/1) ... [2021-11-20 07:15:41,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:15:40" (1/1) ... [2021-11-20 07:15:41,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:15:40" (1/1) ... [2021-11-20 07:15:41,152 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:15:40" (1/1) ... [2021-11-20 07:15:41,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:15:40" (1/1) ... [2021-11-20 07:15:41,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:15:40" (1/1) ... [2021-11-20 07:15:41,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:15:41,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:15:41,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:15:41,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:15:41,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:15:40" (1/1) ... [2021-11-20 07:15:41,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:15:41,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:15:41,262 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:15:41,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:15:41,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:15:41,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:15:41,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:15:41,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:15:41,461 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:15:41,463 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:15:43,376 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:15:43,398 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:15:43,398 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 07:15:43,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:15:43 BoogieIcfgContainer [2021-11-20 07:15:43,402 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:15:43,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:15:43,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:15:43,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:15:43,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:15:39" (1/3) ... [2021-11-20 07:15:43,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b280e84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:15:43, skipping insertion in model container [2021-11-20 07:15:43,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:15:40" (2/3) ... [2021-11-20 07:15:43,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b280e84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:15:43, skipping insertion in model container [2021-11-20 07:15:43,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:15:43" (3/3) ... [2021-11-20 07:15:43,416 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label25.c [2021-11-20 07:15:43,421 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:15:43,422 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:15:43,491 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:15:43,532 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 07:15:43,533 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:15:43,564 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:15:43,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-20 07:15:43,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:43,595 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:15:43,595 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:15:43,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:43,602 INFO L85 PathProgramCache]: Analyzing trace with hash 724714706, now seen corresponding path program 1 times [2021-11-20 07:15:43,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:15:43,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431366338] [2021-11-20 07:15:43,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:43,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:15:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:44,280 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 07:15:44,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:15:44,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431366338] [2021-11-20 07:15:44,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431366338] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:15:44,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:15:44,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:15:44,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546605311] [2021-11-20 07:15:44,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:15:44,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:15:44,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:44,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:15:44,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:15:44,329 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:15:45,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:15:45,580 INFO L93 Difference]: Finished difference Result 836 states and 1480 transitions. [2021-11-20 07:15:45,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:15:45,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-11-20 07:15:45,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:15:45,599 INFO L225 Difference]: With dead ends: 836 [2021-11-20 07:15:45,600 INFO L226 Difference]: Without dead ends: 457 [2021-11-20 07:15:45,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:15:45,608 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 103 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:15:45,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 150 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 07:15:45,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-11-20 07:15:45,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 451. [2021-11-20 07:15:45,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.5977777777777777) internal successors, (719), 450 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:15:45,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 719 transitions. [2021-11-20 07:15:45,679 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 719 transitions. Word has length 180 [2021-11-20 07:15:45,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:15:45,681 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 719 transitions. [2021-11-20 07:15:45,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:15:45,681 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 719 transitions. [2021-11-20 07:15:45,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-20 07:15:45,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:45,686 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:15:45,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:15:45,687 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:15:45,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:45,688 INFO L85 PathProgramCache]: Analyzing trace with hash -586354594, now seen corresponding path program 1 times [2021-11-20 07:15:45,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:15:45,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647049361] [2021-11-20 07:15:45,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:45,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:15:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:45,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:15:45,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:15:45,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647049361] [2021-11-20 07:15:45,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647049361] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:15:45,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:15:45,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:15:45,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397662582] [2021-11-20 07:15:45,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:15:45,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:15:45,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:45,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:15:45,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:15:45,774 INFO L87 Difference]: Start difference. First operand 451 states and 719 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:15:46,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:15:46,733 INFO L93 Difference]: Finished difference Result 1340 states and 2142 transitions. [2021-11-20 07:15:46,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:15:46,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 186 [2021-11-20 07:15:46,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:15:46,740 INFO L225 Difference]: With dead ends: 1340 [2021-11-20 07:15:46,741 INFO L226 Difference]: Without dead ends: 891 [2021-11-20 07:15:46,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:15:46,744 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:15:46,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 141 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 07:15:46,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-11-20 07:15:46,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 886. [2021-11-20 07:15:46,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 1.5785310734463276) internal successors, (1397), 885 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:15:46,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1397 transitions. [2021-11-20 07:15:46,833 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1397 transitions. Word has length 186 [2021-11-20 07:15:46,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:15:46,833 INFO L470 AbstractCegarLoop]: Abstraction has 886 states and 1397 transitions. [2021-11-20 07:15:46,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:15:46,834 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1397 transitions. [2021-11-20 07:15:46,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-20 07:15:46,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:46,841 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:15:46,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:15:46,842 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:15:46,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:46,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1559504468, now seen corresponding path program 1 times [2021-11-20 07:15:46,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:15:46,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393147699] [2021-11-20 07:15:46,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:46,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:15:46,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:46,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:15:46,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:15:46,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393147699] [2021-11-20 07:15:46,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393147699] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:15:46,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:15:46,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:15:46,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452791052] [2021-11-20 07:15:46,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:15:46,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:15:46,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:46,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:15:46,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:15:46,955 INFO L87 Difference]: Start difference. First operand 886 states and 1397 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:15:48,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:15:48,026 INFO L93 Difference]: Finished difference Result 2605 states and 4115 transitions. [2021-11-20 07:15:48,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:15:48,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-11-20 07:15:48,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:15:48,039 INFO L225 Difference]: With dead ends: 2605 [2021-11-20 07:15:48,039 INFO L226 Difference]: Without dead ends: 1721 [2021-11-20 07:15:48,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:15:48,043 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 232 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:15:48,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 126 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 07:15:48,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2021-11-20 07:15:48,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1719. [2021-11-20 07:15:48,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.5005820721769498) internal successors, (2578), 1718 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:15:48,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2578 transitions. [2021-11-20 07:15:48,100 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2578 transitions. Word has length 190 [2021-11-20 07:15:48,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:15:48,101 INFO L470 AbstractCegarLoop]: Abstraction has 1719 states and 2578 transitions. [2021-11-20 07:15:48,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:15:48,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2578 transitions. [2021-11-20 07:15:48,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-20 07:15:48,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:48,109 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:15:48,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 07:15:48,109 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:15:48,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:48,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1196520631, now seen corresponding path program 1 times [2021-11-20 07:15:48,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:15:48,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597768007] [2021-11-20 07:15:48,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:48,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:15:48,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:15:48,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:15:48,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597768007] [2021-11-20 07:15:48,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597768007] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:15:48,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:15:48,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:15:48,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616004783] [2021-11-20 07:15:48,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:15:48,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:15:48,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:48,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:15:48,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:15:48,196 INFO L87 Difference]: Start difference. First operand 1719 states and 2578 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:15:49,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:15:49,235 INFO L93 Difference]: Finished difference Result 5080 states and 7623 transitions. [2021-11-20 07:15:49,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:15:49,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2021-11-20 07:15:49,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:15:49,260 INFO L225 Difference]: With dead ends: 5080 [2021-11-20 07:15:49,260 INFO L226 Difference]: Without dead ends: 3363 [2021-11-20 07:15:49,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:15:49,266 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 254 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:15:49,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 179 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 07:15:49,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3363 states. [2021-11-20 07:15:49,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3363 to 3361. [2021-11-20 07:15:49,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3361 states, 3360 states have (on average 1.4321428571428572) internal successors, (4812), 3360 states have internal predecessors, (4812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:15:49,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3361 states to 3361 states and 4812 transitions. [2021-11-20 07:15:49,424 INFO L78 Accepts]: Start accepts. Automaton has 3361 states and 4812 transitions. Word has length 193 [2021-11-20 07:15:49,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:15:49,424 INFO L470 AbstractCegarLoop]: Abstraction has 3361 states and 4812 transitions. [2021-11-20 07:15:49,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:15:49,425 INFO L276 IsEmpty]: Start isEmpty. Operand 3361 states and 4812 transitions. [2021-11-20 07:15:49,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-20 07:15:49,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:49,435 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:15:49,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 07:15:49,436 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:15:49,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:49,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1347155746, now seen corresponding path program 1 times [2021-11-20 07:15:49,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:15:49,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292520491] [2021-11-20 07:15:49,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:49,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:15:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:49,528 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:15:49,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:15:49,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292520491] [2021-11-20 07:15:49,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292520491] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:15:49,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:15:49,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:15:49,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109075889] [2021-11-20 07:15:49,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:15:49,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:15:49,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:49,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:15:49,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:15:49,536 INFO L87 Difference]: Start difference. First operand 3361 states and 4812 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:15:50,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:15:50,632 INFO L93 Difference]: Finished difference Result 9995 states and 14319 transitions. [2021-11-20 07:15:50,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:15:50,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2021-11-20 07:15:50,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:15:50,679 INFO L225 Difference]: With dead ends: 9995 [2021-11-20 07:15:50,680 INFO L226 Difference]: Without dead ends: 6636 [2021-11-20 07:15:50,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:15:50,693 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 242 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:15:50,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 173 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 07:15:50,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6636 states. [2021-11-20 07:15:50,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6636 to 6630. [2021-11-20 07:15:50,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6630 states, 6629 states have (on average 1.368381354653794) internal successors, (9071), 6629 states have internal predecessors, (9071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:15:50,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6630 states to 6630 states and 9071 transitions. [2021-11-20 07:15:50,985 INFO L78 Accepts]: Start accepts. Automaton has 6630 states and 9071 transitions. Word has length 194 [2021-11-20 07:15:50,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:15:50,986 INFO L470 AbstractCegarLoop]: Abstraction has 6630 states and 9071 transitions. [2021-11-20 07:15:50,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:15:50,992 INFO L276 IsEmpty]: Start isEmpty. Operand 6630 states and 9071 transitions. [2021-11-20 07:15:51,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-20 07:15:51,010 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:51,011 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:15:51,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 07:15:51,013 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:15:51,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:51,016 INFO L85 PathProgramCache]: Analyzing trace with hash -130752193, now seen corresponding path program 1 times [2021-11-20 07:15:51,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:15:51,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937727440] [2021-11-20 07:15:51,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:51,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:15:51,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:51,116 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:15:51,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:15:51,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937727440] [2021-11-20 07:15:51,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937727440] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:15:51,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:15:51,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:15:51,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933683042] [2021-11-20 07:15:51,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:15:51,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:15:51,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:51,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:15:51,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:15:51,121 INFO L87 Difference]: Start difference. First operand 6630 states and 9071 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:15:52,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:15:52,301 INFO L93 Difference]: Finished difference Result 17747 states and 24321 transitions. [2021-11-20 07:15:52,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:15:52,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2021-11-20 07:15:52,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:15:52,381 INFO L225 Difference]: With dead ends: 17747 [2021-11-20 07:15:52,381 INFO L226 Difference]: Without dead ends: 11119 [2021-11-20 07:15:52,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:15:52,396 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 208 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:15:52,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 171 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 07:15:52,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11119 states. [2021-11-20 07:15:52,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11119 to 11096. [2021-11-20 07:15:52,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11096 states, 11095 states have (on average 1.320865254619198) internal successors, (14655), 11095 states have internal predecessors, (14655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:15:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11096 states to 11096 states and 14655 transitions. [2021-11-20 07:15:52,837 INFO L78 Accepts]: Start accepts. Automaton has 11096 states and 14655 transitions. Word has length 199 [2021-11-20 07:15:52,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:15:52,838 INFO L470 AbstractCegarLoop]: Abstraction has 11096 states and 14655 transitions. [2021-11-20 07:15:52,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:15:52,838 INFO L276 IsEmpty]: Start isEmpty. Operand 11096 states and 14655 transitions. [2021-11-20 07:15:52,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-20 07:15:52,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:52,866 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:15:52,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 07:15:52,866 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:15:52,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:52,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1681277464, now seen corresponding path program 1 times [2021-11-20 07:15:52,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:15:52,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478704760] [2021-11-20 07:15:52,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:52,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:15:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:52,968 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:15:52,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:15:52,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478704760] [2021-11-20 07:15:52,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478704760] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:15:52,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524235338] [2021-11-20 07:15:52,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:52,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:15:52,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:15:52,973 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:15:52,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:15:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:53,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 07:15:53,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:15:53,577 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:15:53,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:15:53,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524235338] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:15:53,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:15:53,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-20 07:15:53,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698550927] [2021-11-20 07:15:53,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:15:53,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:15:53,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:53,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:15:53,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:15:53,581 INFO L87 Difference]: Start difference. First operand 11096 states and 14655 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:15:54,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:15:54,822 INFO L93 Difference]: Finished difference Result 29906 states and 39731 transitions. [2021-11-20 07:15:54,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:15:54,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2021-11-20 07:15:54,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:15:54,877 INFO L225 Difference]: With dead ends: 29906 [2021-11-20 07:15:54,878 INFO L226 Difference]: Without dead ends: 19015 [2021-11-20 07:15:54,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:15:54,894 INFO L933 BasicCegarLoop]: 385 mSDtfsCounter, 230 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:15:54,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 413 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 07:15:54,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19015 states. [2021-11-20 07:15:55,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19015 to 19011. [2021-11-20 07:15:55,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19011 states, 19010 states have (on average 1.2027880063124672) internal successors, (22865), 19010 states have internal predecessors, (22865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:15:55,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19011 states to 19011 states and 22865 transitions. [2021-11-20 07:15:55,424 INFO L78 Accepts]: Start accepts. Automaton has 19011 states and 22865 transitions. Word has length 204 [2021-11-20 07:15:55,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:15:55,426 INFO L470 AbstractCegarLoop]: Abstraction has 19011 states and 22865 transitions. [2021-11-20 07:15:55,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:15:55,427 INFO L276 IsEmpty]: Start isEmpty. Operand 19011 states and 22865 transitions. [2021-11-20 07:15:55,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-20 07:15:55,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:55,458 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:15:55,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:15:55,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:15:55,679 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:15:55,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:55,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1944740812, now seen corresponding path program 1 times [2021-11-20 07:15:55,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:15:55,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430192031] [2021-11-20 07:15:55,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:55,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:15:55,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:15:55,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:15:55,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430192031] [2021-11-20 07:15:55,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430192031] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:15:55,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533184819] [2021-11-20 07:15:55,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:55,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:15:55,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:15:55,848 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:15:55,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:15:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:56,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 07:15:56,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:15:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:15:56,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:15:56,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533184819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:15:56,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:15:56,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-20 07:15:56,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030979377] [2021-11-20 07:15:56,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:15:56,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:15:56,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:56,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:15:56,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:15:56,473 INFO L87 Difference]: Start difference. First operand 19011 states and 22865 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:15:57,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:15:57,660 INFO L93 Difference]: Finished difference Result 42894 states and 52535 transitions. [2021-11-20 07:15:57,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:15:57,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2021-11-20 07:15:57,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:15:57,722 INFO L225 Difference]: With dead ends: 42894 [2021-11-20 07:15:57,722 INFO L226 Difference]: Without dead ends: 24088 [2021-11-20 07:15:57,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:15:57,750 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 223 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:15:57,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 170 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 07:15:57,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24088 states. [2021-11-20 07:15:58,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24088 to 24084. [2021-11-20 07:15:58,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24084 states, 24083 states have (on average 1.1824523522816925) internal successors, (28477), 24083 states have internal predecessors, (28477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:15:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24084 states to 24084 states and 28477 transitions. [2021-11-20 07:15:58,352 INFO L78 Accepts]: Start accepts. Automaton has 24084 states and 28477 transitions. Word has length 206 [2021-11-20 07:15:58,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:15:58,353 INFO L470 AbstractCegarLoop]: Abstraction has 24084 states and 28477 transitions. [2021-11-20 07:15:58,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:15:58,353 INFO L276 IsEmpty]: Start isEmpty. Operand 24084 states and 28477 transitions. [2021-11-20 07:15:58,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-20 07:15:58,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:58,388 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:15:58,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:15:58,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 07:15:58,616 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:15:58,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:58,617 INFO L85 PathProgramCache]: Analyzing trace with hash 885807587, now seen corresponding path program 1 times [2021-11-20 07:15:58,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:15:58,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601159156] [2021-11-20 07:15:58,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:58,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:15:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:15:58,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:15:58,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601159156] [2021-11-20 07:15:58,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601159156] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:15:58,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083466855] [2021-11-20 07:15:58,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:15:58,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:15:58,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:15:58,744 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:15:58,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:15:58,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:15:58,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 07:15:58,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:15:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 07:15:59,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:15:59,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083466855] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:15:59,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:15:59,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-20 07:15:59,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739037601] [2021-11-20 07:15:59,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:15:59,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:15:59,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:15:59,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:15:59,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:15:59,493 INFO L87 Difference]: Start difference. First operand 24084 states and 28477 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:00,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:16:00,700 INFO L93 Difference]: Finished difference Result 58778 states and 70029 transitions. [2021-11-20 07:16:00,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:16:00,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2021-11-20 07:16:00,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:16:00,763 INFO L225 Difference]: With dead ends: 58778 [2021-11-20 07:16:00,763 INFO L226 Difference]: Without dead ends: 35102 [2021-11-20 07:16:00,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:16:00,794 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 89 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:16:00,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 181 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 07:16:00,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35102 states. [2021-11-20 07:16:01,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35102 to 35086. [2021-11-20 07:16:01,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35086 states, 35085 states have (on average 1.1760866467151205) internal successors, (41263), 35085 states have internal predecessors, (41263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:01,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35086 states to 35086 states and 41263 transitions. [2021-11-20 07:16:01,488 INFO L78 Accepts]: Start accepts. Automaton has 35086 states and 41263 transitions. Word has length 215 [2021-11-20 07:16:01,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:16:01,488 INFO L470 AbstractCegarLoop]: Abstraction has 35086 states and 41263 transitions. [2021-11-20 07:16:01,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:01,489 INFO L276 IsEmpty]: Start isEmpty. Operand 35086 states and 41263 transitions. [2021-11-20 07:16:01,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-20 07:16:01,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:16:01,568 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:16:01,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:16:01,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 07:16:01,787 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:16:01,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:16:01,787 INFO L85 PathProgramCache]: Analyzing trace with hash 382365, now seen corresponding path program 1 times [2021-11-20 07:16:01,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:16:01,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889624756] [2021-11-20 07:16:01,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:01,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:16:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:01,910 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:16:01,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:16:01,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889624756] [2021-11-20 07:16:01,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889624756] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:16:01,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639266784] [2021-11-20 07:16:01,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:01,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:16:01,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:16:01,913 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:16:01,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:16:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:02,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 07:16:02,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:16:02,755 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 07:16:02,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:16:02,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639266784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:16:02,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:16:02,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-20 07:16:02,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960577290] [2021-11-20 07:16:02,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:16:02,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:16:02,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:16:02,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:16:02,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:16:02,758 INFO L87 Difference]: Start difference. First operand 35086 states and 41263 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:03,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:16:04,000 INFO L93 Difference]: Finished difference Result 84436 states and 99671 transitions. [2021-11-20 07:16:04,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:16:04,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 228 [2021-11-20 07:16:04,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:16:04,083 INFO L225 Difference]: With dead ends: 84436 [2021-11-20 07:16:04,083 INFO L226 Difference]: Without dead ends: 49758 [2021-11-20 07:16:04,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:16:04,108 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 64 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:16:04,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 218 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 07:16:04,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49758 states. [2021-11-20 07:16:05,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49758 to 47075. [2021-11-20 07:16:05,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47075 states, 47074 states have (on average 1.1830947019586184) internal successors, (55693), 47074 states have internal predecessors, (55693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:05,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47075 states to 47075 states and 55693 transitions. [2021-11-20 07:16:05,505 INFO L78 Accepts]: Start accepts. Automaton has 47075 states and 55693 transitions. Word has length 228 [2021-11-20 07:16:05,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:16:05,505 INFO L470 AbstractCegarLoop]: Abstraction has 47075 states and 55693 transitions. [2021-11-20 07:16:05,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:05,506 INFO L276 IsEmpty]: Start isEmpty. Operand 47075 states and 55693 transitions. [2021-11-20 07:16:05,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-11-20 07:16:05,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:16:05,551 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:16:05,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:16:05,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 07:16:05,769 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:16:05,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:16:05,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1347151785, now seen corresponding path program 1 times [2021-11-20 07:16:05,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:16:05,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086473756] [2021-11-20 07:16:05,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:05,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:16:05,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:06,026 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 07:16:06,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:16:06,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086473756] [2021-11-20 07:16:06,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086473756] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:16:06,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829606607] [2021-11-20 07:16:06,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:06,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:16:06,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:16:06,029 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:16:06,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:16:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:06,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 07:16:06,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:16:06,568 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 07:16:06,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:16:06,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829606607] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:16:06,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:16:06,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-20 07:16:06,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125790857] [2021-11-20 07:16:06,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:16:06,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:16:06,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:16:06,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:16:06,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:16:06,571 INFO L87 Difference]: Start difference. First operand 47075 states and 55693 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:07,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:16:07,674 INFO L93 Difference]: Finished difference Result 93745 states and 110937 transitions. [2021-11-20 07:16:07,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:16:07,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 245 [2021-11-20 07:16:07,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:16:07,724 INFO L225 Difference]: With dead ends: 93745 [2021-11-20 07:16:07,724 INFO L226 Difference]: Without dead ends: 47078 [2021-11-20 07:16:07,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:16:07,755 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 262 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:16:07,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 342 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 07:16:07,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47078 states. [2021-11-20 07:16:08,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47078 to 45856. [2021-11-20 07:16:08,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45856 states, 45855 states have (on average 1.1619234543670265) internal successors, (53280), 45855 states have internal predecessors, (53280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:08,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45856 states to 45856 states and 53280 transitions. [2021-11-20 07:16:08,603 INFO L78 Accepts]: Start accepts. Automaton has 45856 states and 53280 transitions. Word has length 245 [2021-11-20 07:16:08,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:16:08,604 INFO L470 AbstractCegarLoop]: Abstraction has 45856 states and 53280 transitions. [2021-11-20 07:16:08,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:08,604 INFO L276 IsEmpty]: Start isEmpty. Operand 45856 states and 53280 transitions. [2021-11-20 07:16:08,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-20 07:16:08,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:16:08,646 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:16:08,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:16:08,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:16:08,860 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:16:08,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:16:08,860 INFO L85 PathProgramCache]: Analyzing trace with hash -974196740, now seen corresponding path program 1 times [2021-11-20 07:16:08,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:16:08,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393848067] [2021-11-20 07:16:08,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:08,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:16:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 07:16:08,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:16:08,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393848067] [2021-11-20 07:16:08,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393848067] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:16:08,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572292041] [2021-11-20 07:16:08,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:08,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:16:08,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:16:08,960 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:16:08,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:16:09,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:09,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:16:09,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:16:09,685 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:16:09,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:16:09,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572292041] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:16:09,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:16:09,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-20 07:16:09,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056312846] [2021-11-20 07:16:09,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:16:09,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:16:09,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:16:09,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:16:09,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:16:09,688 INFO L87 Difference]: Start difference. First operand 45856 states and 53280 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:10,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:16:10,829 INFO L93 Difference]: Finished difference Result 88239 states and 102175 transitions. [2021-11-20 07:16:10,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:16:10,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 246 [2021-11-20 07:16:10,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:16:10,877 INFO L225 Difference]: With dead ends: 88239 [2021-11-20 07:16:10,877 INFO L226 Difference]: Without dead ends: 42791 [2021-11-20 07:16:10,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:16:10,901 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 248 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:16:10,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 376 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 07:16:10,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42791 states. [2021-11-20 07:16:11,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42791 to 39332. [2021-11-20 07:16:11,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39332 states, 39331 states have (on average 1.1241260074750197) internal successors, (44213), 39331 states have internal predecessors, (44213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:11,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39332 states to 39332 states and 44213 transitions. [2021-11-20 07:16:11,626 INFO L78 Accepts]: Start accepts. Automaton has 39332 states and 44213 transitions. Word has length 246 [2021-11-20 07:16:11,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:16:11,626 INFO L470 AbstractCegarLoop]: Abstraction has 39332 states and 44213 transitions. [2021-11-20 07:16:11,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:11,627 INFO L276 IsEmpty]: Start isEmpty. Operand 39332 states and 44213 transitions. [2021-11-20 07:16:11,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-11-20 07:16:11,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:16:11,656 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:16:11,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:16:11,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 07:16:11,860 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:16:11,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:16:11,861 INFO L85 PathProgramCache]: Analyzing trace with hash -35903996, now seen corresponding path program 1 times [2021-11-20 07:16:11,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:16:11,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845467094] [2021-11-20 07:16:11,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:11,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:16:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:11,996 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 91 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:16:11,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:16:11,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845467094] [2021-11-20 07:16:11,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845467094] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:16:11,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363461660] [2021-11-20 07:16:11,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:11,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:16:11,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:16:11,998 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:16:11,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:16:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:12,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 07:16:12,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:16:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 07:16:12,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:16:12,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363461660] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:16:12,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:16:12,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-20 07:16:12,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996680705] [2021-11-20 07:16:12,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:16:12,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:16:12,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:16:12,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:16:12,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:16:12,618 INFO L87 Difference]: Start difference. First operand 39332 states and 44213 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:13,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:16:13,691 INFO L93 Difference]: Finished difference Result 78057 states and 87771 transitions. [2021-11-20 07:16:13,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:16:13,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 247 [2021-11-20 07:16:13,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:16:13,731 INFO L225 Difference]: With dead ends: 78057 [2021-11-20 07:16:13,731 INFO L226 Difference]: Without dead ends: 39336 [2021-11-20 07:16:13,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:16:13,746 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 96 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:16:13,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 101 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 07:16:13,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39336 states. [2021-11-20 07:16:14,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39336 to 39332. [2021-11-20 07:16:14,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39332 states, 39331 states have (on average 1.1220157127965218) internal successors, (44130), 39331 states have internal predecessors, (44130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:14,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39332 states to 39332 states and 44130 transitions. [2021-11-20 07:16:14,413 INFO L78 Accepts]: Start accepts. Automaton has 39332 states and 44130 transitions. Word has length 247 [2021-11-20 07:16:14,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:16:14,414 INFO L470 AbstractCegarLoop]: Abstraction has 39332 states and 44130 transitions. [2021-11-20 07:16:14,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:14,415 INFO L276 IsEmpty]: Start isEmpty. Operand 39332 states and 44130 transitions. [2021-11-20 07:16:14,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-11-20 07:16:14,444 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:16:14,445 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:16:14,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:16:14,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 07:16:14,660 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:16:14,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:16:14,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1901025622, now seen corresponding path program 1 times [2021-11-20 07:16:14,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:16:14,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549532194] [2021-11-20 07:16:14,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:14,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:16:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:14,787 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 110 proven. 6 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-20 07:16:14,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:16:14,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549532194] [2021-11-20 07:16:14,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549532194] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:16:14,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703816030] [2021-11-20 07:16:14,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:14,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:16:14,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:16:14,792 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:16:14,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 07:16:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:14,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 07:16:14,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:16:15,437 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-20 07:16:15,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:16:15,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703816030] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:16:15,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:16:15,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-20 07:16:15,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944444197] [2021-11-20 07:16:15,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:16:15,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:16:15,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:16:15,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:16:15,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:16:15,440 INFO L87 Difference]: Start difference. First operand 39332 states and 44130 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:16,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:16:16,290 INFO L93 Difference]: Finished difference Result 113467 states and 127351 transitions. [2021-11-20 07:16:16,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:16:16,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 275 [2021-11-20 07:16:16,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:16:16,382 INFO L225 Difference]: With dead ends: 113467 [2021-11-20 07:16:16,383 INFO L226 Difference]: Without dead ends: 74746 [2021-11-20 07:16:16,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:16:16,408 INFO L933 BasicCegarLoop]: 595 mSDtfsCounter, 307 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:16:16,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 865 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:16:16,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74746 states. [2021-11-20 07:16:17,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74746 to 68041. [2021-11-20 07:16:17,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68041 states, 68040 states have (on average 1.112962962962963) internal successors, (75726), 68040 states have internal predecessors, (75726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:17,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68041 states to 68041 states and 75726 transitions. [2021-11-20 07:16:17,566 INFO L78 Accepts]: Start accepts. Automaton has 68041 states and 75726 transitions. Word has length 275 [2021-11-20 07:16:17,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:16:17,566 INFO L470 AbstractCegarLoop]: Abstraction has 68041 states and 75726 transitions. [2021-11-20 07:16:17,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:17,567 INFO L276 IsEmpty]: Start isEmpty. Operand 68041 states and 75726 transitions. [2021-11-20 07:16:17,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-11-20 07:16:17,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:16:17,606 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:16:17,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:16:17,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 07:16:17,807 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:16:17,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:16:17,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1302108884, now seen corresponding path program 1 times [2021-11-20 07:16:17,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:16:17,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571006201] [2021-11-20 07:16:17,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:17,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:16:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 99 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:16:17,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:16:17,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571006201] [2021-11-20 07:16:17,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571006201] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:16:17,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329017065] [2021-11-20 07:16:17,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:17,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:16:17,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:16:17,974 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:16:17,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 07:16:18,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:18,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:16:18,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:16:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-20 07:16:18,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:16:18,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329017065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:16:18,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:16:18,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-20 07:16:18,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400145918] [2021-11-20 07:16:18,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:16:18,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:16:18,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:16:18,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:16:18,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:16:18,903 INFO L87 Difference]: Start difference. First operand 68041 states and 75726 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:20,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:16:20,145 INFO L93 Difference]: Finished difference Result 134864 states and 150119 transitions. [2021-11-20 07:16:20,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:16:20,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 280 [2021-11-20 07:16:20,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:16:20,215 INFO L225 Difference]: With dead ends: 134864 [2021-11-20 07:16:20,215 INFO L226 Difference]: Without dead ends: 67434 [2021-11-20 07:16:20,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:16:20,241 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 105 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:16:20,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 372 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 07:16:20,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67434 states. [2021-11-20 07:16:21,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67434 to 64996. [2021-11-20 07:16:21,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64996 states, 64995 states have (on average 1.0931610123855682) internal successors, (71050), 64995 states have internal predecessors, (71050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:21,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64996 states to 64996 states and 71050 transitions. [2021-11-20 07:16:21,248 INFO L78 Accepts]: Start accepts. Automaton has 64996 states and 71050 transitions. Word has length 280 [2021-11-20 07:16:21,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:16:21,249 INFO L470 AbstractCegarLoop]: Abstraction has 64996 states and 71050 transitions. [2021-11-20 07:16:21,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:21,249 INFO L276 IsEmpty]: Start isEmpty. Operand 64996 states and 71050 transitions. [2021-11-20 07:16:21,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2021-11-20 07:16:21,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:16:21,298 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:16:21,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:16:21,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 07:16:21,509 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:16:21,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:16:21,509 INFO L85 PathProgramCache]: Analyzing trace with hash 677487726, now seen corresponding path program 1 times [2021-11-20 07:16:21,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:16:21,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235972300] [2021-11-20 07:16:21,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:21,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:16:21,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:21,615 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 124 proven. 6 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-11-20 07:16:21,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:16:21,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235972300] [2021-11-20 07:16:21,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235972300] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:16:21,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089794530] [2021-11-20 07:16:21,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:21,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:16:21,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:16:21,618 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:16:21,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 07:16:22,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:22,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:16:22,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:16:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 217 proven. 35 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 07:16:22,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:16:23,718 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 217 proven. 35 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 07:16:23,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089794530] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:16:23,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:16:23,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 6 [2021-11-20 07:16:23,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104731558] [2021-11-20 07:16:23,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:16:23,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:16:23,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:16:23,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:16:23,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:16:23,721 INFO L87 Difference]: Start difference. First operand 64996 states and 71050 transitions. Second operand has 6 states, 6 states have (on average 57.0) internal successors, (342), 6 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:28,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:16:28,838 INFO L93 Difference]: Finished difference Result 262013 states and 287924 transitions. [2021-11-20 07:16:28,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:16:28,838 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 57.0) internal successors, (342), 6 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 315 [2021-11-20 07:16:28,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:16:29,085 INFO L225 Difference]: With dead ends: 262013 [2021-11-20 07:16:29,085 INFO L226 Difference]: Without dead ends: 197425 [2021-11-20 07:16:29,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 645 GetRequests, 634 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:16:29,129 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 2802 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 3959 mSolverCounterSat, 679 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2802 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 4638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 679 IncrementalHoareTripleChecker+Valid, 3959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:16:29,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2802 Valid, 441 Invalid, 4638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [679 Valid, 3959 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-20 07:16:29,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197425 states. [2021-11-20 07:16:32,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197425 to 194495. [2021-11-20 07:16:32,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194495 states, 194494 states have (on average 1.0928923257272718) internal successors, (212561), 194494 states have internal predecessors, (212561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:32,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194495 states to 194495 states and 212561 transitions. [2021-11-20 07:16:32,648 INFO L78 Accepts]: Start accepts. Automaton has 194495 states and 212561 transitions. Word has length 315 [2021-11-20 07:16:32,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:16:32,648 INFO L470 AbstractCegarLoop]: Abstraction has 194495 states and 212561 transitions. [2021-11-20 07:16:32,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.0) internal successors, (342), 6 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:32,649 INFO L276 IsEmpty]: Start isEmpty. Operand 194495 states and 212561 transitions. [2021-11-20 07:16:32,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-11-20 07:16:32,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:16:32,759 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:16:32,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:16:32,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 07:16:32,960 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:16:32,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:16:32,961 INFO L85 PathProgramCache]: Analyzing trace with hash 939208580, now seen corresponding path program 1 times [2021-11-20 07:16:32,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:16:32,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192514940] [2021-11-20 07:16:32,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:32,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:16:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 177 proven. 12 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-20 07:16:33,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:16:33,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192514940] [2021-11-20 07:16:33,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192514940] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:16:33,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862651100] [2021-11-20 07:16:33,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:33,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:16:33,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:16:33,157 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:16:33,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 07:16:34,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:34,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:16:34,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:16:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 07:16:34,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:16:34,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862651100] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:16:34,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:16:34,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-20 07:16:34,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100492845] [2021-11-20 07:16:34,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:16:34,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:16:34,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:16:34,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:16:34,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:16:34,969 INFO L87 Difference]: Start difference. First operand 194495 states and 212561 transitions. Second operand has 4 states, 4 states have (on average 65.5) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:37,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:16:37,564 INFO L93 Difference]: Finished difference Result 397537 states and 434235 transitions. [2021-11-20 07:16:37,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:16:37,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 65.5) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 330 [2021-11-20 07:16:37,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:16:37,871 INFO L225 Difference]: With dead ends: 397537 [2021-11-20 07:16:37,871 INFO L226 Difference]: Without dead ends: 203856 [2021-11-20 07:16:37,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:16:37,962 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 438 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:16:37,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 200 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 07:16:38,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203856 states. [2021-11-20 07:16:41,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203856 to 196931. [2021-11-20 07:16:41,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196931 states, 196930 states have (on average 1.0883918143502767) internal successors, (214337), 196930 states have internal predecessors, (214337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:42,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196931 states to 196931 states and 214337 transitions. [2021-11-20 07:16:42,199 INFO L78 Accepts]: Start accepts. Automaton has 196931 states and 214337 transitions. Word has length 330 [2021-11-20 07:16:42,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:16:42,199 INFO L470 AbstractCegarLoop]: Abstraction has 196931 states and 214337 transitions. [2021-11-20 07:16:42,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.5) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:42,200 INFO L276 IsEmpty]: Start isEmpty. Operand 196931 states and 214337 transitions. [2021-11-20 07:16:42,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-11-20 07:16:42,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:16:42,287 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:16:42,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:16:42,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 07:16:42,488 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:16:42,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:16:42,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1410722384, now seen corresponding path program 1 times [2021-11-20 07:16:42,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:16:42,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481078103] [2021-11-20 07:16:42,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:42,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:16:42,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 176 proven. 11 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-20 07:16:42,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:16:42,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481078103] [2021-11-20 07:16:42,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481078103] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:16:42,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039260862] [2021-11-20 07:16:42,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:42,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:16:42,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:16:42,661 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:16:42,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 07:16:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:42,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:16:42,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:16:43,668 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-20 07:16:43,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:16:43,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039260862] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:16:43,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:16:43,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-20 07:16:43,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032180957] [2021-11-20 07:16:43,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:16:43,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:16:43,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:16:43,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:16:43,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:16:43,671 INFO L87 Difference]: Start difference. First operand 196931 states and 214337 transitions. Second operand has 4 states, 4 states have (on average 72.25) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:47,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:16:47,028 INFO L93 Difference]: Finished difference Result 448636 states and 489252 transitions. [2021-11-20 07:16:47,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:16:47,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 346 [2021-11-20 07:16:47,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:16:47,391 INFO L225 Difference]: With dead ends: 448636 [2021-11-20 07:16:47,391 INFO L226 Difference]: Without dead ends: 252113 [2021-11-20 07:16:48,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:16:48,296 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 350 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:16:48,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 154 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 07:16:48,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252113 states. [2021-11-20 07:16:51,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252113 to 200964. [2021-11-20 07:16:52,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200964 states, 200963 states have (on average 1.0762727467245214) internal successors, (216291), 200963 states have internal predecessors, (216291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:52,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200964 states to 200964 states and 216291 transitions. [2021-11-20 07:16:52,343 INFO L78 Accepts]: Start accepts. Automaton has 200964 states and 216291 transitions. Word has length 346 [2021-11-20 07:16:52,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:16:52,344 INFO L470 AbstractCegarLoop]: Abstraction has 200964 states and 216291 transitions. [2021-11-20 07:16:52,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:16:52,344 INFO L276 IsEmpty]: Start isEmpty. Operand 200964 states and 216291 transitions. [2021-11-20 07:16:52,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-11-20 07:16:52,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:16:52,463 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:16:52,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 07:16:52,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 07:16:52,664 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:16:52,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:16:52,664 INFO L85 PathProgramCache]: Analyzing trace with hash -2120345378, now seen corresponding path program 1 times [2021-11-20 07:16:52,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:16:52,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741345755] [2021-11-20 07:16:52,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:52,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:16:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 120 proven. 6 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-11-20 07:16:52,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:16:52,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741345755] [2021-11-20 07:16:52,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741345755] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:16:52,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327942087] [2021-11-20 07:16:52,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:16:52,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:16:52,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:16:52,792 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:16:52,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e1c88d9-814f-4a2e-9666-1b986be75ea3/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 07:16:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:16:52,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:16:52,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:16:54,541 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-11-20 07:16:54,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:16:54,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327942087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:16:54,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:16:54,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-20 07:16:54,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981289908] [2021-11-20 07:16:54,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:16:54,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:16:54,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:16:54,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:16:54,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:16:54,544 INFO L87 Difference]: Start difference. First operand 200964 states and 216291 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)