./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label13.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_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/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_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label13.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/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_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/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 67239f1bf7e0cdf325715bd48f4c9c86a0588f752ce48acb5db8e3f7bfd7cd18 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:54:35,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:54:35,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:54:35,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:54:35,928 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:54:35,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:54:35,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:54:35,935 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:54:35,938 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:54:35,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:54:35,941 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:54:35,943 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:54:35,943 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:54:35,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:54:35,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:54:35,949 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:54:35,950 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:54:35,952 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:54:35,954 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:54:35,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:54:35,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:54:35,963 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:54:35,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:54:35,967 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:54:35,976 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:54:35,982 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:54:35,982 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:54:35,984 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:54:35,986 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:54:35,988 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:54:35,989 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:54:35,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:54:35,993 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:54:35,994 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:54:35,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:54:35,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:54:35,998 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:54:35,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:54:35,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:54:36,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:54:36,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:54:36,003 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:54:36,060 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:54:36,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:54:36,062 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:54:36,062 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:54:36,071 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:54:36,071 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:54:36,072 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:54:36,073 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:54:36,073 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:54:36,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:54:36,075 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:54:36,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:54:36,075 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:54:36,076 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:54:36,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:54:36,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:54:36,077 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:54:36,077 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:54:36,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:54:36,077 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:54:36,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:54:36,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:54:36,078 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:54:36,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:54:36,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:54:36,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:54:36,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:54:36,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:54:36,080 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:54:36,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:54:36,083 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:54:36,083 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:54:36,083 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:54:36,084 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:54:36,084 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_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67239f1bf7e0cdf325715bd48f4c9c86a0588f752ce48acb5db8e3f7bfd7cd18 [2021-11-20 06:54:36,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:54:36,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:54:36,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:54:36,440 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:54:36,441 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:54:36,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/eca-rers2012/Problem03_label13.c [2021-11-20 06:54:36,530 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/data/20f418717/288b766c82694cf4aedc9d2e37a71cde/FLAG6af992248 [2021-11-20 06:54:37,324 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:54:37,324 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/sv-benchmarks/c/eca-rers2012/Problem03_label13.c [2021-11-20 06:54:37,355 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/data/20f418717/288b766c82694cf4aedc9d2e37a71cde/FLAG6af992248 [2021-11-20 06:54:37,411 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/data/20f418717/288b766c82694cf4aedc9d2e37a71cde [2021-11-20 06:54:37,415 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:54:37,417 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:54:37,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:54:37,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:54:37,425 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:54:37,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:54:37" (1/1) ... [2021-11-20 06:54:37,428 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32cdcc00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:37, skipping insertion in model container [2021-11-20 06:54:37,429 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:54:37" (1/1) ... [2021-11-20 06:54:37,438 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:54:37,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:54:38,315 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_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/sv-benchmarks/c/eca-rers2012/Problem03_label13.c[55139,55152] [2021-11-20 06:54:38,372 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:54:38,384 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:54:38,813 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_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/sv-benchmarks/c/eca-rers2012/Problem03_label13.c[55139,55152] [2021-11-20 06:54:38,833 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:54:38,854 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:54:38,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:38 WrapperNode [2021-11-20 06:54:38,855 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:54:38,857 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:54:38,857 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:54:38,857 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:54:38,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:38" (1/1) ... [2021-11-20 06:54:38,916 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:38" (1/1) ... [2021-11-20 06:54:39,018 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-11-20 06:54:39,018 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:54:39,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:54:39,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:54:39,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:54:39,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:38" (1/1) ... [2021-11-20 06:54:39,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:38" (1/1) ... [2021-11-20 06:54:39,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:38" (1/1) ... [2021-11-20 06:54:39,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:38" (1/1) ... [2021-11-20 06:54:39,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:38" (1/1) ... [2021-11-20 06:54:39,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:38" (1/1) ... [2021-11-20 06:54:39,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:38" (1/1) ... [2021-11-20 06:54:39,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:54:39,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:54:39,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:54:39,210 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:54:39,211 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:38" (1/1) ... [2021-11-20 06:54:39,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:54:39,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:39,251 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:54:39,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:54:39,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:54:39,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:54:39,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:54:39,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:54:39,443 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:54:39,445 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:54:41,502 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:54:41,524 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:54:41,524 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:54:41,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:54:41 BoogieIcfgContainer [2021-11-20 06:54:41,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:54:41,530 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:54:41,531 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:54:41,535 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:54:41,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:54:37" (1/3) ... [2021-11-20 06:54:41,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190502fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:54:41, skipping insertion in model container [2021-11-20 06:54:41,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:38" (2/3) ... [2021-11-20 06:54:41,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190502fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:54:41, skipping insertion in model container [2021-11-20 06:54:41,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:54:41" (3/3) ... [2021-11-20 06:54:41,540 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label13.c [2021-11-20 06:54:41,551 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:54:41,551 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:54:41,614 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:54:41,622 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 06:54:41,622 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:54:41,658 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 06:54:41,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-20 06:54:41,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:41,677 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] [2021-11-20 06:54:41,678 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:41,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:41,684 INFO L85 PathProgramCache]: Analyzing trace with hash -233001789, now seen corresponding path program 1 times [2021-11-20 06:54:41,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:41,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715937172] [2021-11-20 06:54:41,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:41,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:42,419 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 06:54:42,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:42,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715937172] [2021-11-20 06:54:42,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715937172] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:42,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:42,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:54:42,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751179553] [2021-11-20 06:54:42,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:42,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:54:42,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:42,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:54:42,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:42,481 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 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 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 06:54:43,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:43,959 INFO L93 Difference]: Finished difference Result 864 states and 1514 transitions. [2021-11-20 06:54:43,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:54:43,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 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 155 [2021-11-20 06:54:43,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:43,988 INFO L225 Difference]: With dead ends: 864 [2021-11-20 06:54:43,988 INFO L226 Difference]: Without dead ends: 468 [2021-11-20 06:54:44,000 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 06:54:44,006 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 123 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:44,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 167 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 06:54:44,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-11-20 06:54:44,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 454. [2021-11-20 06:54:44,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.6269315673289184) internal successors, (737), 453 states have internal predecessors, (737), 0 states have call successors, (0), 0 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 06:54:44,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 737 transitions. [2021-11-20 06:54:44,104 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 737 transitions. Word has length 155 [2021-11-20 06:54:44,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:44,106 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 737 transitions. [2021-11-20 06:54:44,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 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 06:54:44,107 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 737 transitions. [2021-11-20 06:54:44,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-20 06:54:44,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:44,113 INFO L514 BasicCegarLoop]: trace histogram [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 06:54:44,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:54:44,114 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:44,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:44,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1225907725, now seen corresponding path program 1 times [2021-11-20 06:54:44,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:44,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592703367] [2021-11-20 06:54:44,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:44,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:44,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:44,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:44,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:44,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592703367] [2021-11-20 06:54:44,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592703367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:44,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:44,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:54:44,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028555673] [2021-11-20 06:54:44,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:44,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:54:44,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:44,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:54:44,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:44,302 INFO L87 Difference]: Start difference. First operand 454 states and 737 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 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 06:54:45,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:45,316 INFO L93 Difference]: Finished difference Result 1330 states and 2169 transitions. [2021-11-20 06:54:45,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:54:45,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 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 160 [2021-11-20 06:54:45,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:45,326 INFO L225 Difference]: With dead ends: 1330 [2021-11-20 06:54:45,326 INFO L226 Difference]: Without dead ends: 878 [2021-11-20 06:54:45,327 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 06:54:45,329 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 251 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:45,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 163 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:54:45,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-11-20 06:54:45,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 874. [2021-11-20 06:54:45,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 1.52233676975945) internal successors, (1329), 873 states have internal predecessors, (1329), 0 states have call successors, (0), 0 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 06:54:45,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1329 transitions. [2021-11-20 06:54:45,384 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1329 transitions. Word has length 160 [2021-11-20 06:54:45,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:45,385 INFO L470 AbstractCegarLoop]: Abstraction has 874 states and 1329 transitions. [2021-11-20 06:54:45,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 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 06:54:45,385 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1329 transitions. [2021-11-20 06:54:45,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-20 06:54:45,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:45,395 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:54:45,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:54:45,396 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:45,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:45,397 INFO L85 PathProgramCache]: Analyzing trace with hash 948456388, now seen corresponding path program 1 times [2021-11-20 06:54:45,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:45,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769302169] [2021-11-20 06:54:45,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:45,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:45,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:45,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:45,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:45,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769302169] [2021-11-20 06:54:45,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769302169] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:45,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:45,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:54:45,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941083071] [2021-11-20 06:54:45,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:45,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:54:45,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:45,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:54:45,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:45,481 INFO L87 Difference]: Start difference. First operand 874 states and 1329 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 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 06:54:46,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:46,497 INFO L93 Difference]: Finished difference Result 2575 states and 3935 transitions. [2021-11-20 06:54:46,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:54:46,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 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 163 [2021-11-20 06:54:46,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:46,509 INFO L225 Difference]: With dead ends: 2575 [2021-11-20 06:54:46,509 INFO L226 Difference]: Without dead ends: 1703 [2021-11-20 06:54:46,511 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 06:54:46,523 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:46,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 92 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:54:46,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-11-20 06:54:46,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1687. [2021-11-20 06:54:46,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 1.498220640569395) internal successors, (2526), 1686 states have internal predecessors, (2526), 0 states have call successors, (0), 0 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 06:54:46,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 2526 transitions. [2021-11-20 06:54:46,586 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 2526 transitions. Word has length 163 [2021-11-20 06:54:46,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:46,588 INFO L470 AbstractCegarLoop]: Abstraction has 1687 states and 2526 transitions. [2021-11-20 06:54:46,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 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 06:54:46,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 2526 transitions. [2021-11-20 06:54:46,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-20 06:54:46,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:46,600 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-11-20 06:54:46,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:54:46,601 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:46,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:46,603 INFO L85 PathProgramCache]: Analyzing trace with hash 974158482, now seen corresponding path program 1 times [2021-11-20 06:54:46,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:46,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597846298] [2021-11-20 06:54:46,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:46,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:46,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:54:46,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:46,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597846298] [2021-11-20 06:54:46,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597846298] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:46,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:46,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:54:46,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017220101] [2021-11-20 06:54:46,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:46,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:54:46,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:46,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:54:46,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:46,748 INFO L87 Difference]: Start difference. First operand 1687 states and 2526 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 06:54:47,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:47,840 INFO L93 Difference]: Finished difference Result 4194 states and 6260 transitions. [2021-11-20 06:54:47,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:54:47,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 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 172 [2021-11-20 06:54:47,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:47,858 INFO L225 Difference]: With dead ends: 4194 [2021-11-20 06:54:47,859 INFO L226 Difference]: Without dead ends: 2509 [2021-11-20 06:54:47,862 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 06:54:47,873 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 234 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:47,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 115 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:54:47,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2021-11-20 06:54:47,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 2508. [2021-11-20 06:54:47,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2507 states have (on average 1.4654966094934185) internal successors, (3674), 2507 states have internal predecessors, (3674), 0 states have call successors, (0), 0 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 06:54:47,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 3674 transitions. [2021-11-20 06:54:47,955 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 3674 transitions. Word has length 172 [2021-11-20 06:54:47,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:47,956 INFO L470 AbstractCegarLoop]: Abstraction has 2508 states and 3674 transitions. [2021-11-20 06:54:47,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 06:54:47,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 3674 transitions. [2021-11-20 06:54:47,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-20 06:54:47,963 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:47,963 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] [2021-11-20 06:54:47,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:54:47,964 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:47,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:47,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1777547190, now seen corresponding path program 1 times [2021-11-20 06:54:47,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:47,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108856005] [2021-11-20 06:54:47,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:47,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:48,061 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 06:54:48,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:48,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108856005] [2021-11-20 06:54:48,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108856005] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:48,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:48,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:54:48,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282320648] [2021-11-20 06:54:48,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:48,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:54:48,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:48,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:54:48,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:48,068 INFO L87 Difference]: Start difference. First operand 2508 states and 3674 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 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 06:54:49,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:49,136 INFO L93 Difference]: Finished difference Result 6243 states and 9108 transitions. [2021-11-20 06:54:49,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:54:49,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 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 174 [2021-11-20 06:54:49,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:49,161 INFO L225 Difference]: With dead ends: 6243 [2021-11-20 06:54:49,161 INFO L226 Difference]: Without dead ends: 3737 [2021-11-20 06:54:49,165 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 06:54:49,166 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 208 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:49,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 155 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:54:49,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3737 states. [2021-11-20 06:54:49,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3737 to 3726. [2021-11-20 06:54:49,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3726 states, 3725 states have (on average 1.4112751677852349) internal successors, (5257), 3725 states have internal predecessors, (5257), 0 states have call successors, (0), 0 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 06:54:49,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3726 states to 3726 states and 5257 transitions. [2021-11-20 06:54:49,304 INFO L78 Accepts]: Start accepts. Automaton has 3726 states and 5257 transitions. Word has length 174 [2021-11-20 06:54:49,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:49,305 INFO L470 AbstractCegarLoop]: Abstraction has 3726 states and 5257 transitions. [2021-11-20 06:54:49,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 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 06:54:49,311 INFO L276 IsEmpty]: Start isEmpty. Operand 3726 states and 5257 transitions. [2021-11-20 06:54:49,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-20 06:54:49,320 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:49,321 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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] [2021-11-20 06:54:49,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:54:49,323 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:49,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:49,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1531262147, now seen corresponding path program 1 times [2021-11-20 06:54:49,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:49,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526557407] [2021-11-20 06:54:49,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:49,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:49,425 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:54:49,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:49,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526557407] [2021-11-20 06:54:49,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526557407] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:49,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:49,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:54:49,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266024957] [2021-11-20 06:54:49,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:49,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:54:49,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:49,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:54:49,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:49,429 INFO L87 Difference]: Start difference. First operand 3726 states and 5257 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 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 06:54:50,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:50,574 INFO L93 Difference]: Finished difference Result 10904 states and 15407 transitions. [2021-11-20 06:54:50,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:54:50,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 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 175 [2021-11-20 06:54:50,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:50,615 INFO L225 Difference]: With dead ends: 10904 [2021-11-20 06:54:50,616 INFO L226 Difference]: Without dead ends: 7180 [2021-11-20 06:54:50,621 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 06:54:50,624 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 225 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:50,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 429 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:54:50,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7180 states. [2021-11-20 06:54:50,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7180 to 6163. [2021-11-20 06:54:50,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6163 states, 6162 states have (on average 1.294871794871795) internal successors, (7979), 6162 states have internal predecessors, (7979), 0 states have call successors, (0), 0 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 06:54:50,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6163 states to 6163 states and 7979 transitions. [2021-11-20 06:54:50,788 INFO L78 Accepts]: Start accepts. Automaton has 6163 states and 7979 transitions. Word has length 175 [2021-11-20 06:54:50,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:50,788 INFO L470 AbstractCegarLoop]: Abstraction has 6163 states and 7979 transitions. [2021-11-20 06:54:50,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 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 06:54:50,789 INFO L276 IsEmpty]: Start isEmpty. Operand 6163 states and 7979 transitions. [2021-11-20 06:54:50,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-20 06:54:50,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:50,799 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] [2021-11-20 06:54:50,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:54:50,800 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:50,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:50,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1605526751, now seen corresponding path program 1 times [2021-11-20 06:54:50,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:50,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929301943] [2021-11-20 06:54:50,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:50,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:50,895 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 06:54:50,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:50,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929301943] [2021-11-20 06:54:50,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929301943] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:54:50,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638941684] [2021-11-20 06:54:50,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:50,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:50,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:50,902 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:54:50,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:54:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:51,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:54:51,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:51,858 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-20 06:54:51,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:54:51,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638941684] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:51,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:54:51,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-20 06:54:51,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501412401] [2021-11-20 06:54:51,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:51,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:54:51,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:51,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:54:51,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:54:51,863 INFO L87 Difference]: Start difference. First operand 6163 states and 7979 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 06:54:52,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:52,952 INFO L93 Difference]: Finished difference Result 17012 states and 22108 transitions. [2021-11-20 06:54:52,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:54:52,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 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 181 [2021-11-20 06:54:52,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:53,022 INFO L225 Difference]: With dead ends: 17012 [2021-11-20 06:54:53,022 INFO L226 Difference]: Without dead ends: 10851 [2021-11-20 06:54:53,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 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 06:54:53,032 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 106 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:53,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 167 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:54:53,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2021-11-20 06:54:53,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10647. [2021-11-20 06:54:53,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10647 states, 10646 states have (on average 1.2629156490700733) internal successors, (13445), 10646 states have internal predecessors, (13445), 0 states have call successors, (0), 0 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 06:54:53,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10647 states to 10647 states and 13445 transitions. [2021-11-20 06:54:53,435 INFO L78 Accepts]: Start accepts. Automaton has 10647 states and 13445 transitions. Word has length 181 [2021-11-20 06:54:53,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:53,437 INFO L470 AbstractCegarLoop]: Abstraction has 10647 states and 13445 transitions. [2021-11-20 06:54:53,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 06:54:53,437 INFO L276 IsEmpty]: Start isEmpty. Operand 10647 states and 13445 transitions. [2021-11-20 06:54:53,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-20 06:54:53,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:53,458 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, 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] [2021-11-20 06:54:53,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:54:53,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 06:54:53,686 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:53,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:53,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1425017727, now seen corresponding path program 1 times [2021-11-20 06:54:53,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:53,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996673154] [2021-11-20 06:54:53,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:53,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:53,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:53,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:53,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996673154] [2021-11-20 06:54:53,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996673154] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:54:53,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202109319] [2021-11-20 06:54:53,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:53,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:53,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:53,832 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:54:53,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:54:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:53,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:54:54,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:54,594 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:54:54,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:54:54,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202109319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:54,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:54:54,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-20 06:54:54,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961867008] [2021-11-20 06:54:54,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:54,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:54:54,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:54,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:54:54,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:54:54,598 INFO L87 Difference]: Start difference. First operand 10647 states and 13445 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 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 06:54:55,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:55,758 INFO L93 Difference]: Finished difference Result 29228 states and 37033 transitions. [2021-11-20 06:54:55,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:54:55,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 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 06:54:55,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:55,816 INFO L225 Difference]: With dead ends: 29228 [2021-11-20 06:54:55,816 INFO L226 Difference]: Without dead ends: 18583 [2021-11-20 06:54:55,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 192 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 06:54:55,893 INFO L933 BasicCegarLoop]: 369 mSDtfsCounter, 97 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:55,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 399 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:54:55,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18583 states. [2021-11-20 06:54:56,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18583 to 18574. [2021-11-20 06:54:56,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18574 states, 18573 states have (on average 1.234803208959242) internal successors, (22934), 18573 states have internal predecessors, (22934), 0 states have call successors, (0), 0 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 06:54:56,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18574 states to 18574 states and 22934 transitions. [2021-11-20 06:54:56,399 INFO L78 Accepts]: Start accepts. Automaton has 18574 states and 22934 transitions. Word has length 193 [2021-11-20 06:54:56,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:56,400 INFO L470 AbstractCegarLoop]: Abstraction has 18574 states and 22934 transitions. [2021-11-20 06:54:56,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 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 06:54:56,401 INFO L276 IsEmpty]: Start isEmpty. Operand 18574 states and 22934 transitions. [2021-11-20 06:54:56,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-20 06:54:56,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:56,443 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, 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] [2021-11-20 06:54:56,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:54:56,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:56,657 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:56,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:56,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1807391862, now seen corresponding path program 1 times [2021-11-20 06:54:56,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:56,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523074353] [2021-11-20 06:54:56,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:56,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:56,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:56,771 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:54:56,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:56,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523074353] [2021-11-20 06:54:56,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523074353] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:56,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:56,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:54:56,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533919859] [2021-11-20 06:54:56,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:56,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:54:56,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:56,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:54:56,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:56,776 INFO L87 Difference]: Start difference. First operand 18574 states and 22934 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:58,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:58,043 INFO L93 Difference]: Finished difference Result 44860 states and 56269 transitions. [2021-11-20 06:54:58,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:54:58,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2021-11-20 06:54:58,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:58,099 INFO L225 Difference]: With dead ends: 44860 [2021-11-20 06:54:58,099 INFO L226 Difference]: Without dead ends: 26491 [2021-11-20 06:54:58,126 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 06:54:58,127 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 176 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:58,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 203 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 06:54:58,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26491 states. [2021-11-20 06:54:58,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26491 to 26491. [2021-11-20 06:54:58,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26491 states, 26490 states have (on average 1.1830502076255192) internal successors, (31339), 26490 states have internal predecessors, (31339), 0 states have call successors, (0), 0 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 06:54:58,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26491 states to 26491 states and 31339 transitions. [2021-11-20 06:54:58,802 INFO L78 Accepts]: Start accepts. Automaton has 26491 states and 31339 transitions. Word has length 206 [2021-11-20 06:54:58,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:58,803 INFO L470 AbstractCegarLoop]: Abstraction has 26491 states and 31339 transitions. [2021-11-20 06:54:58,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:58,803 INFO L276 IsEmpty]: Start isEmpty. Operand 26491 states and 31339 transitions. [2021-11-20 06:54:58,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-20 06:54:58,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:58,847 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 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] [2021-11-20 06:54:58,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 06:54:58,847 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:58,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:58,849 INFO L85 PathProgramCache]: Analyzing trace with hash 844524870, now seen corresponding path program 1 times [2021-11-20 06:54:58,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:58,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109069159] [2021-11-20 06:54:58,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:58,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 98 proven. 6 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-20 06:54:58,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:58,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109069159] [2021-11-20 06:54:58,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109069159] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:54:58,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960462106] [2021-11-20 06:54:58,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:58,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:58,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:58,998 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:54:59,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:54:59,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:59,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:54:59,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:00,017 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-20 06:55:00,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:55:00,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960462106] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:00,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:55:00,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-20 06:55:00,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203104678] [2021-11-20 06:55:00,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:00,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:55:00,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:00,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:55:00,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:55:00,022 INFO L87 Difference]: Start difference. First operand 26491 states and 31339 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:00,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:00,915 INFO L93 Difference]: Finished difference Result 78450 states and 92791 transitions. [2021-11-20 06:55:00,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:55:00,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 258 [2021-11-20 06:55:00,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:01,047 INFO L225 Difference]: With dead ends: 78450 [2021-11-20 06:55:01,048 INFO L226 Difference]: Without dead ends: 52164 [2021-11-20 06:55:01,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 257 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 06:55:01,109 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 320 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:01,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 596 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:55:01,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52164 states. [2021-11-20 06:55:02,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52164 to 52162. [2021-11-20 06:55:02,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52162 states, 52161 states have (on average 1.1806713828339181) internal successors, (61585), 52161 states have internal predecessors, (61585), 0 states have call successors, (0), 0 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 06:55:02,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52162 states to 52162 states and 61585 transitions. [2021-11-20 06:55:02,187 INFO L78 Accepts]: Start accepts. Automaton has 52162 states and 61585 transitions. Word has length 258 [2021-11-20 06:55:02,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:02,188 INFO L470 AbstractCegarLoop]: Abstraction has 52162 states and 61585 transitions. [2021-11-20 06:55:02,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:02,188 INFO L276 IsEmpty]: Start isEmpty. Operand 52162 states and 61585 transitions. [2021-11-20 06:55:02,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-11-20 06:55:02,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:02,262 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, 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, 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] [2021-11-20 06:55:02,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:55:02,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:02,479 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:02,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:02,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1012073035, now seen corresponding path program 1 times [2021-11-20 06:55:02,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:02,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396889961] [2021-11-20 06:55:02,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:02,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:02,826 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-20 06:55:02,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:02,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396889961] [2021-11-20 06:55:02,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396889961] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:55:02,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687579033] [2021-11-20 06:55:02,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:02,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:02,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:55:02,830 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:55:02,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:55:03,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:03,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:55:03,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:03,818 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-20 06:55:03,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:55:03,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687579033] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:03,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:55:03,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-20 06:55:03,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688928765] [2021-11-20 06:55:03,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:03,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:55:03,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:03,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:55:03,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:55:03,822 INFO L87 Difference]: Start difference. First operand 52162 states and 61585 transitions. Second operand has 4 states, 4 states have (on average 49.0) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:05,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:05,726 INFO L93 Difference]: Finished difference Result 150597 states and 178484 transitions. [2021-11-20 06:55:05,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:55:05,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2021-11-20 06:55:05,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:06,120 INFO L225 Difference]: With dead ends: 150597 [2021-11-20 06:55:06,120 INFO L226 Difference]: Without dead ends: 98640 [2021-11-20 06:55:06,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:55:06,213 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 584 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:06,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [584 Valid, 540 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 06:55:06,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98640 states. [2021-11-20 06:55:07,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98640 to 98588. [2021-11-20 06:55:07,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98588 states, 98587 states have (on average 1.1811902177771918) internal successors, (116450), 98587 states have internal predecessors, (116450), 0 states have call successors, (0), 0 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 06:55:08,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98588 states to 98588 states and 116450 transitions. [2021-11-20 06:55:08,048 INFO L78 Accepts]: Start accepts. Automaton has 98588 states and 116450 transitions. Word has length 266 [2021-11-20 06:55:08,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:08,049 INFO L470 AbstractCegarLoop]: Abstraction has 98588 states and 116450 transitions. [2021-11-20 06:55:08,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:08,050 INFO L276 IsEmpty]: Start isEmpty. Operand 98588 states and 116450 transitions. [2021-11-20 06:55:08,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2021-11-20 06:55:08,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:08,133 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:55:08,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:55:08,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 06:55:08,362 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:08,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:08,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1569244843, now seen corresponding path program 1 times [2021-11-20 06:55:08,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:08,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378305491] [2021-11-20 06:55:08,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:08,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:08,513 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 132 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-20 06:55:08,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:08,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378305491] [2021-11-20 06:55:08,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378305491] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:55:08,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700727943] [2021-11-20 06:55:08,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:08,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:08,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:55:08,518 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:55:08,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:55:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:08,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:55:08,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-20 06:55:09,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:55:09,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700727943] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:09,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:55:09,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-11-20 06:55:09,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429596115] [2021-11-20 06:55:09,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:09,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:55:09,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:09,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:55:09,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:55:09,829 INFO L87 Difference]: Start difference. First operand 98588 states and 116450 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 06:55:11,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:11,707 INFO L93 Difference]: Finished difference Result 244505 states and 288561 transitions. [2021-11-20 06:55:11,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:55:11,708 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 295 [2021-11-20 06:55:11,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:12,155 INFO L225 Difference]: With dead ends: 244505 [2021-11-20 06:55:12,169 INFO L226 Difference]: Without dead ends: 146122 [2021-11-20 06:55:12,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:55:12,238 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 156 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:12,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 206 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:55:12,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146122 states. [2021-11-20 06:55:14,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146122 to 135152. [2021-11-20 06:55:14,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135152 states, 135151 states have (on average 1.1671907718033903) internal successors, (157747), 135151 states have internal predecessors, (157747), 0 states have call successors, (0), 0 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 06:55:14,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135152 states to 135152 states and 157747 transitions. [2021-11-20 06:55:14,652 INFO L78 Accepts]: Start accepts. Automaton has 135152 states and 157747 transitions. Word has length 295 [2021-11-20 06:55:14,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:14,653 INFO L470 AbstractCegarLoop]: Abstraction has 135152 states and 157747 transitions. [2021-11-20 06:55:14,653 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 06:55:14,653 INFO L276 IsEmpty]: Start isEmpty. Operand 135152 states and 157747 transitions. [2021-11-20 06:55:15,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-11-20 06:55:15,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:15,276 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 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] [2021-11-20 06:55:15,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:55:15,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 06:55:15,477 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:15,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:15,478 INFO L85 PathProgramCache]: Analyzing trace with hash -59881777, now seen corresponding path program 1 times [2021-11-20 06:55:15,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:15,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959938682] [2021-11-20 06:55:15,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:15,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:15,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-20 06:55:15,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:15,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959938682] [2021-11-20 06:55:15,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959938682] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:15,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:55:15,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:55:15,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021450349] [2021-11-20 06:55:15,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:15,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:55:15,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:15,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:55:15,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:55:15,646 INFO L87 Difference]: Start difference. First operand 135152 states and 157747 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) 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) [2021-11-20 06:55:17,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:17,804 INFO L93 Difference]: Finished difference Result 266911 states and 311355 transitions. [2021-11-20 06:55:17,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:55:17,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) 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) Word has length 298 [2021-11-20 06:55:17,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:18,022 INFO L225 Difference]: With dead ends: 266911 [2021-11-20 06:55:18,023 INFO L226 Difference]: Without dead ends: 131964 [2021-11-20 06:55:18,096 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 06:55:18,110 INFO L933 BasicCegarLoop]: 363 mSDtfsCounter, 173 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:18,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 384 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:55:18,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131964 states. [2021-11-20 06:55:19,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131964 to 126017. [2021-11-20 06:55:20,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126017 states, 126016 states have (on average 1.153647155916709) internal successors, (145378), 126016 states have internal predecessors, (145378), 0 states have call successors, (0), 0 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 06:55:20,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126017 states to 126017 states and 145378 transitions. [2021-11-20 06:55:20,706 INFO L78 Accepts]: Start accepts. Automaton has 126017 states and 145378 transitions. Word has length 298 [2021-11-20 06:55:20,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:20,706 INFO L470 AbstractCegarLoop]: Abstraction has 126017 states and 145378 transitions. [2021-11-20 06:55:20,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) 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) [2021-11-20 06:55:20,707 INFO L276 IsEmpty]: Start isEmpty. Operand 126017 states and 145378 transitions. [2021-11-20 06:55:20,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-11-20 06:55:20,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:20,744 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:55:20,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 06:55:20,745 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:20,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:20,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1921048994, now seen corresponding path program 1 times [2021-11-20 06:55:20,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:20,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968232055] [2021-11-20 06:55:20,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:20,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:20,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:20,862 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-20 06:55:20,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:20,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968232055] [2021-11-20 06:55:20,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968232055] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:20,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:55:20,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:55:20,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311149949] [2021-11-20 06:55:20,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:20,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:55:20,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:20,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:55:20,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:55:20,865 INFO L87 Difference]: Start difference. First operand 126017 states and 145378 transitions. Second operand has 4 states, 4 states have (on average 50.0) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:23,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:23,401 INFO L93 Difference]: Finished difference Result 378074 states and 435559 transitions. [2021-11-20 06:55:23,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:55:23,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.0) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 300 [2021-11-20 06:55:23,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:23,730 INFO L225 Difference]: With dead ends: 378074 [2021-11-20 06:55:23,730 INFO L226 Difference]: Without dead ends: 252262 [2021-11-20 06:55:23,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:55:23,788 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 789 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:23,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 408 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:55:23,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252262 states. [2021-11-20 06:55:27,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252262 to 242090. [2021-11-20 06:55:28,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242090 states, 242089 states have (on average 1.1476523096877596) internal successors, (277834), 242089 states have internal predecessors, (277834), 0 states have call successors, (0), 0 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 06:55:28,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242090 states to 242090 states and 277834 transitions. [2021-11-20 06:55:28,602 INFO L78 Accepts]: Start accepts. Automaton has 242090 states and 277834 transitions. Word has length 300 [2021-11-20 06:55:28,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:28,603 INFO L470 AbstractCegarLoop]: Abstraction has 242090 states and 277834 transitions. [2021-11-20 06:55:28,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.0) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:28,603 INFO L276 IsEmpty]: Start isEmpty. Operand 242090 states and 277834 transitions. [2021-11-20 06:55:28,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-11-20 06:55:28,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:28,669 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, 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, 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] [2021-11-20 06:55:28,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 06:55:28,669 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:28,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:28,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1508885811, now seen corresponding path program 1 times [2021-11-20 06:55:28,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:28,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76186369] [2021-11-20 06:55:28,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:28,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:28,903 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:55:28,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:28,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76186369] [2021-11-20 06:55:28,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76186369] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:28,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:55:28,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:55:28,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61995783] [2021-11-20 06:55:28,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:28,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:55:28,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:28,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:55:28,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:55:28,907 INFO L87 Difference]: Start difference. First operand 242090 states and 277834 transitions. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 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 06:55:31,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:31,797 INFO L93 Difference]: Finished difference Result 436425 states and 499463 transitions. [2021-11-20 06:55:31,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:55:31,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 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 302 [2021-11-20 06:55:31,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:32,059 INFO L225 Difference]: With dead ends: 436425 [2021-11-20 06:55:32,059 INFO L226 Difference]: Without dead ends: 194540 [2021-11-20 06:55:32,152 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 06:55:32,153 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 123 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:32,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 350 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 06:55:33,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194540 states. [2021-11-20 06:55:35,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194540 to 181532. [2021-11-20 06:55:35,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181532 states, 181531 states have (on average 1.1189989588555123) internal successors, (203133), 181531 states have internal predecessors, (203133), 0 states have call successors, (0), 0 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 06:55:36,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181532 states to 181532 states and 203133 transitions. [2021-11-20 06:55:36,908 INFO L78 Accepts]: Start accepts. Automaton has 181532 states and 203133 transitions. Word has length 302 [2021-11-20 06:55:36,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:36,909 INFO L470 AbstractCegarLoop]: Abstraction has 181532 states and 203133 transitions. [2021-11-20 06:55:36,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 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 06:55:36,909 INFO L276 IsEmpty]: Start isEmpty. Operand 181532 states and 203133 transitions. [2021-11-20 06:55:36,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-11-20 06:55:36,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:36,977 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 3, 3, 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] [2021-11-20 06:55:36,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 06:55:36,977 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:36,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:36,978 INFO L85 PathProgramCache]: Analyzing trace with hash -102169711, now seen corresponding path program 1 times [2021-11-20 06:55:36,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:36,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260736263] [2021-11-20 06:55:36,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:36,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:37,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 102 proven. 6 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-11-20 06:55:37,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:37,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260736263] [2021-11-20 06:55:37,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260736263] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:55:37,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91083638] [2021-11-20 06:55:37,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:37,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:37,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:55:37,104 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:55:37,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1eaac76d-4c98-4c6c-b755-db6514b6f1ca/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:55:37,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:37,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:55:37,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:38,041 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-11-20 06:55:38,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:55:38,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91083638] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:38,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:55:38,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-20 06:55:38,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115088218] [2021-11-20 06:55:38,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:38,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:55:38,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:38,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:55:38,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:55:38,044 INFO L87 Difference]: Start difference. First operand 181532 states and 203133 transitions. Second operand has 4 states, 4 states have (on average 48.5) internal successors, (194), 3 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 06:55:41,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:41,168 INFO L93 Difference]: Finished difference Result 561160 states and 626938 transitions. [2021-11-20 06:55:41,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:55:41,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 3 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 323 [2021-11-20 06:55:41,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:41,623 INFO L225 Difference]: With dead ends: 561160 [2021-11-20 06:55:41,623 INFO L226 Difference]: Without dead ends: 380036 [2021-11-20 06:55:41,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:55:41,709 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 791 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:41,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 400 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:55:42,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380036 states.