./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label25.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label25.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS --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 e174a47646cc352906a4c559dce6734a9432a39b7e8aac542f068ec793f56d82 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 02:17:30,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 02:17:30,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 02:17:30,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 02:17:30,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 02:17:30,472 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 02:17:30,474 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 02:17:30,476 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 02:17:30,478 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 02:17:30,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 02:17:30,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 02:17:30,482 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 02:17:30,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 02:17:30,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 02:17:30,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 02:17:30,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 02:17:30,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 02:17:30,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 02:17:30,491 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 02:17:30,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 02:17:30,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 02:17:30,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 02:17:30,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 02:17:30,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 02:17:30,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 02:17:30,502 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 02:17:30,503 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 02:17:30,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 02:17:30,505 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 02:17:30,506 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 02:17:30,506 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 02:17:30,508 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 02:17:30,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 02:17:30,510 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 02:17:30,511 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 02:17:30,511 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 02:17:30,512 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 02:17:30,513 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 02:17:30,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 02:17:30,514 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 02:17:30,515 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 02:17:30,517 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 02:17:30,540 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 02:17:30,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 02:17:30,541 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 02:17:30,541 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 02:17:30,542 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 02:17:30,542 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 02:17:30,543 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 02:17:30,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 02:17:30,543 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 02:17:30,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 02:17:30,544 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 02:17:30,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 02:17:30,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 02:17:30,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 02:17:30,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 02:17:30,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 02:17:30,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 02:17:30,545 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 02:17:30,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 02:17:30,546 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 02:17:30,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 02:17:30,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 02:17:30,547 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 02:17:30,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 02:17:30,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:17:30,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 02:17:30,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 02:17:30,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 02:17:30,548 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 02:17:30,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 02:17:30,548 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 02:17:30,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 02:17:30,549 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 02:17:30,549 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 02:17:30,549 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e174a47646cc352906a4c559dce6734a9432a39b7e8aac542f068ec793f56d82 [2022-11-23 02:17:30,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 02:17:30,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 02:17:30,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 02:17:30,815 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 02:17:30,816 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 02:17:30,817 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/eca-rers2012/Problem12_label25.c [2022-11-23 02:17:33,932 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 02:17:34,457 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 02:17:34,457 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/sv-benchmarks/c/eca-rers2012/Problem12_label25.c [2022-11-23 02:17:34,482 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/data/75303318b/ef96d65d82ac4a3daf594785958b8f62/FLAG5d9de15c9 [2022-11-23 02:17:34,498 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/data/75303318b/ef96d65d82ac4a3daf594785958b8f62 [2022-11-23 02:17:34,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 02:17:34,506 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 02:17:34,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 02:17:34,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 02:17:34,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 02:17:34,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:17:34" (1/1) ... [2022-11-23 02:17:34,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f08875d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:34, skipping insertion in model container [2022-11-23 02:17:34,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:17:34" (1/1) ... [2022-11-23 02:17:34,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 02:17:34,665 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 02:17:34,916 WARN L237 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_9f5aace0-54b3-45bb-9033-48b17453b865/sv-benchmarks/c/eca-rers2012/Problem12_label25.c[2447,2460] [2022-11-23 02:17:36,020 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:17:36,031 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 02:17:36,062 WARN L237 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_9f5aace0-54b3-45bb-9033-48b17453b865/sv-benchmarks/c/eca-rers2012/Problem12_label25.c[2447,2460] [2022-11-23 02:17:36,703 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:17:36,728 INFO L208 MainTranslator]: Completed translation [2022-11-23 02:17:36,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:36 WrapperNode [2022-11-23 02:17:36,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 02:17:36,731 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 02:17:36,731 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 02:17:36,731 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 02:17:36,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:36" (1/1) ... [2022-11-23 02:17:36,810 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:36" (1/1) ... [2022-11-23 02:17:37,156 INFO L138 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2022-11-23 02:17:37,157 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 02:17:37,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 02:17:37,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 02:17:37,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 02:17:37,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:36" (1/1) ... [2022-11-23 02:17:37,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:36" (1/1) ... [2022-11-23 02:17:37,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:36" (1/1) ... [2022-11-23 02:17:37,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:36" (1/1) ... [2022-11-23 02:17:37,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:36" (1/1) ... [2022-11-23 02:17:37,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:36" (1/1) ... [2022-11-23 02:17:37,544 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:36" (1/1) ... [2022-11-23 02:17:37,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:36" (1/1) ... [2022-11-23 02:17:37,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 02:17:37,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 02:17:37,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 02:17:37,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 02:17:37,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:36" (1/1) ... [2022-11-23 02:17:37,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:17:37,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:17:37,672 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 02:17:37,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 02:17:37,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 02:17:37,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 02:17:37,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 02:17:37,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 02:17:37,837 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 02:17:37,839 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 02:17:43,328 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 02:17:43,349 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 02:17:43,350 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 02:17:43,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:17:43 BoogieIcfgContainer [2022-11-23 02:17:43,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 02:17:43,359 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 02:17:43,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 02:17:43,363 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 02:17:43,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:17:34" (1/3) ... [2022-11-23 02:17:43,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7de6e6e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:17:43, skipping insertion in model container [2022-11-23 02:17:43,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:36" (2/3) ... [2022-11-23 02:17:43,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7de6e6e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:17:43, skipping insertion in model container [2022-11-23 02:17:43,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:17:43" (3/3) ... [2022-11-23 02:17:43,368 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label25.c [2022-11-23 02:17:43,388 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 02:17:43,389 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 02:17:43,488 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 02:17:43,496 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3b793eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 02:17:43,497 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 02:17:43,506 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:17:43,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 02:17:43,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:17:43,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:17:43,514 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:17:43,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:17:43,519 INFO L85 PathProgramCache]: Analyzing trace with hash 156847385, now seen corresponding path program 1 times [2022-11-23 02:17:43,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:17:43,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817563484] [2022-11-23 02:17:43,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:17:43,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:17:43,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:17:43,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:17:43,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:17:43,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817563484] [2022-11-23 02:17:43,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817563484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:17:43,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:17:43,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:17:43,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103324429] [2022-11-23 02:17:43,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:17:43,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:17:43,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:17:43,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:17:43,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:17:43,831 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 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 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:17:49,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:17:49,086 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2022-11-23 02:17:49,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:17:49,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-23 02:17:49,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:17:49,112 INFO L225 Difference]: With dead ends: 2388 [2022-11-23 02:17:49,113 INFO L226 Difference]: Without dead ends: 1506 [2022-11-23 02:17:49,119 INFO L412 NwaCegarLoop]: 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 [2022-11-23 02:17:49,122 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 842 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 1058 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 3395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1058 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-23 02:17:49,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 102 Invalid, 3395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1058 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-23 02:17:49,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-11-23 02:17:49,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2022-11-23 02:17:49,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.869767441860465) internal successors, (2814), 1505 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:17:49,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2814 transitions. [2022-11-23 02:17:49,273 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2814 transitions. Word has length 17 [2022-11-23 02:17:49,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:17:49,274 INFO L495 AbstractCegarLoop]: Abstraction has 1506 states and 2814 transitions. [2022-11-23 02:17:49,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:17:49,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2814 transitions. [2022-11-23 02:17:49,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-23 02:17:49,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:17:49,280 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 02:17:49,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 02:17:49,281 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:17:49,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:17:49,282 INFO L85 PathProgramCache]: Analyzing trace with hash 492884016, now seen corresponding path program 1 times [2022-11-23 02:17:49,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:17:49,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819177491] [2022-11-23 02:17:49,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:17:49,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:17:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:17:49,559 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:17:49,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:17:49,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819177491] [2022-11-23 02:17:49,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819177491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:17:49,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:17:49,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:17:49,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131915713] [2022-11-23 02:17:49,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:17:49,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:17:49,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:17:49,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:17:49,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:17:49,572 INFO L87 Difference]: Start difference. First operand 1506 states and 2814 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:17:53,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:17:53,896 INFO L93 Difference]: Finished difference Result 4514 states and 8438 transitions. [2022-11-23 02:17:53,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:17:53,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2022-11-23 02:17:53,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:17:53,909 INFO L225 Difference]: With dead ends: 4514 [2022-11-23 02:17:53,910 INFO L226 Difference]: Without dead ends: 3010 [2022-11-23 02:17:53,913 INFO L412 NwaCegarLoop]: 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 [2022-11-23 02:17:53,914 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 918 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-23 02:17:53,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [918 Valid, 354 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-23 02:17:53,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3010 states. [2022-11-23 02:17:53,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3010 to 3008. [2022-11-23 02:17:53,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 1.6531426671100764) internal successors, (4971), 3007 states have internal predecessors, (4971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:17:53,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4971 transitions. [2022-11-23 02:17:53,999 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4971 transitions. Word has length 90 [2022-11-23 02:17:53,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:17:53,999 INFO L495 AbstractCegarLoop]: Abstraction has 3008 states and 4971 transitions. [2022-11-23 02:17:54,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:17:54,000 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4971 transitions. [2022-11-23 02:17:54,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-23 02:17:54,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:17:54,002 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 02:17:54,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 02:17:54,003 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:17:54,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:17:54,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1741347085, now seen corresponding path program 1 times [2022-11-23 02:17:54,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:17:54,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581654920] [2022-11-23 02:17:54,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:17:54,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:17:54,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:17:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:17:54,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:17:54,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581654920] [2022-11-23 02:17:54,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581654920] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:17:54,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:17:54,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 02:17:54,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977456876] [2022-11-23 02:17:54,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:17:54,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:17:54,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:17:54,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:17:54,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:17:54,452 INFO L87 Difference]: Start difference. First operand 3008 states and 4971 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:18:02,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:18:02,139 INFO L93 Difference]: Finished difference Result 8267 states and 13429 transitions. [2022-11-23 02:18:02,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:18:02,140 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2022-11-23 02:18:02,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:18:02,162 INFO L225 Difference]: With dead ends: 8267 [2022-11-23 02:18:02,163 INFO L226 Difference]: Without dead ends: 5261 [2022-11-23 02:18:02,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:18:02,168 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 2154 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 4998 mSolverCounterSat, 851 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2154 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 5849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 851 IncrementalHoareTripleChecker+Valid, 4998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-23 02:18:02,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2154 Valid, 353 Invalid, 5849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [851 Valid, 4998 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-11-23 02:18:02,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2022-11-23 02:18:02,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 5261. [2022-11-23 02:18:02,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5261 states, 5260 states have (on average 1.5102661596958176) internal successors, (7944), 5260 states have internal predecessors, (7944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:18:02,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 7944 transitions. [2022-11-23 02:18:02,300 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 7944 transitions. Word has length 103 [2022-11-23 02:18:02,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:18:02,300 INFO L495 AbstractCegarLoop]: Abstraction has 5261 states and 7944 transitions. [2022-11-23 02:18:02,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:18:02,301 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 7944 transitions. [2022-11-23 02:18:02,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-23 02:18:02,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:18:02,315 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 02:18:02,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 02:18:02,316 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:18:02,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:18:02,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1190910438, now seen corresponding path program 1 times [2022-11-23 02:18:02,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:18:02,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074565245] [2022-11-23 02:18:02,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:18:02,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:18:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:18:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:18:02,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:18:02,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074565245] [2022-11-23 02:18:02,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074565245] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:18:02,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982751697] [2022-11-23 02:18:02,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:18:02,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:18:02,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:18:02,794 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:18:02,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 02:18:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:18:02,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 02:18:02,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:18:03,282 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 02:18:03,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:18:03,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982751697] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:18:03,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:18:03,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-23 02:18:03,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970493189] [2022-11-23 02:18:03,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:18:03,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:18:03,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:18:03,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:18:03,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:18:03,286 INFO L87 Difference]: Start difference. First operand 5261 states and 7944 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:18:07,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:18:07,800 INFO L93 Difference]: Finished difference Result 14275 states and 22313 transitions. [2022-11-23 02:18:07,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:18:07,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 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 158 [2022-11-23 02:18:07,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:18:07,837 INFO L225 Difference]: With dead ends: 14275 [2022-11-23 02:18:07,837 INFO L226 Difference]: Without dead ends: 9767 [2022-11-23 02:18:07,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:18:07,845 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 622 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2597 mSolverCounterSat, 505 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 3102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 505 IncrementalHoareTripleChecker+Valid, 2597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-23 02:18:07,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [622 Valid, 643 Invalid, 3102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [505 Valid, 2597 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-23 02:18:07,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2022-11-23 02:18:08,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 8265. [2022-11-23 02:18:08,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8265 states, 8264 states have (on average 1.547676669893514) internal successors, (12790), 8264 states have internal predecessors, (12790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:18:08,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8265 states to 8265 states and 12790 transitions. [2022-11-23 02:18:08,125 INFO L78 Accepts]: Start accepts. Automaton has 8265 states and 12790 transitions. Word has length 158 [2022-11-23 02:18:08,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:18:08,126 INFO L495 AbstractCegarLoop]: Abstraction has 8265 states and 12790 transitions. [2022-11-23 02:18:08,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:18:08,126 INFO L276 IsEmpty]: Start isEmpty. Operand 8265 states and 12790 transitions. [2022-11-23 02:18:08,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-11-23 02:18:08,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:18:08,130 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:18:08,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 02:18:08,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:18:08,343 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:18:08,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:18:08,344 INFO L85 PathProgramCache]: Analyzing trace with hash 877432713, now seen corresponding path program 1 times [2022-11-23 02:18:08,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:18:08,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928047167] [2022-11-23 02:18:08,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:18:08,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:18:08,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:18:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-23 02:18:08,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:18:08,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928047167] [2022-11-23 02:18:08,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928047167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:18:08,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:18:08,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 02:18:08,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942260176] [2022-11-23 02:18:08,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:18:08,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:18:08,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:18:08,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:18:08,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:18:08,913 INFO L87 Difference]: Start difference. First operand 8265 states and 12790 transitions. Second operand has 4 states, 4 states have (on average 47.5) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:18:13,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:18:13,743 INFO L93 Difference]: Finished difference Result 18820 states and 29046 transitions. [2022-11-23 02:18:13,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:18:13,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.5) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2022-11-23 02:18:13,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:18:13,776 INFO L225 Difference]: With dead ends: 18820 [2022-11-23 02:18:13,777 INFO L226 Difference]: Without dead ends: 11271 [2022-11-23 02:18:13,784 INFO L412 NwaCegarLoop]: 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 [2022-11-23 02:18:13,785 INFO L413 NwaCegarLoop]: 695 mSDtfsCounter, 706 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3109 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 3501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 3109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-23 02:18:13,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [706 Valid, 710 Invalid, 3501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 3109 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-23 02:18:13,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11271 states. [2022-11-23 02:18:13,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11271 to 11269. [2022-11-23 02:18:13,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11269 states, 11268 states have (on average 1.410010649627263) internal successors, (15888), 11268 states have internal predecessors, (15888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:18:14,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11269 states to 11269 states and 15888 transitions. [2022-11-23 02:18:14,015 INFO L78 Accepts]: Start accepts. Automaton has 11269 states and 15888 transitions. Word has length 238 [2022-11-23 02:18:14,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:18:14,015 INFO L495 AbstractCegarLoop]: Abstraction has 11269 states and 15888 transitions. [2022-11-23 02:18:14,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.5) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:18:14,016 INFO L276 IsEmpty]: Start isEmpty. Operand 11269 states and 15888 transitions. [2022-11-23 02:18:14,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-11-23 02:18:14,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:18:14,023 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:18:14,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 02:18:14,024 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:18:14,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:18:14,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1557090008, now seen corresponding path program 1 times [2022-11-23 02:18:14,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:18:14,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915820546] [2022-11-23 02:18:14,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:18:14,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:18:14,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:18:14,382 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-23 02:18:14,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:18:14,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915820546] [2022-11-23 02:18:14,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915820546] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:18:14,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:18:14,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:18:14,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106439802] [2022-11-23 02:18:14,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:18:14,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:18:14,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:18:14,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:18:14,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:18:14,388 INFO L87 Difference]: Start difference. First operand 11269 states and 15888 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 2 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:18:18,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:18:18,583 INFO L93 Difference]: Finished difference Result 27793 states and 39491 transitions. [2022-11-23 02:18:18,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:18:18,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 2 states have internal predecessors, (227), 0 states have call successors, (0), 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 308 [2022-11-23 02:18:18,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:18:18,624 INFO L225 Difference]: With dead ends: 27793 [2022-11-23 02:18:18,624 INFO L226 Difference]: Without dead ends: 17277 [2022-11-23 02:18:18,637 INFO L412 NwaCegarLoop]: 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 [2022-11-23 02:18:18,638 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 697 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1973 mSolverCounterSat, 798 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 2771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 798 IncrementalHoareTripleChecker+Valid, 1973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-23 02:18:18,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [697 Valid, 427 Invalid, 2771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [798 Valid, 1973 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-23 02:18:18,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17277 states. [2022-11-23 02:18:18,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17277 to 15024. [2022-11-23 02:18:18,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15024 states, 15023 states have (on average 1.2371696731678095) internal successors, (18586), 15023 states have internal predecessors, (18586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:18:18,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15024 states to 15024 states and 18586 transitions. [2022-11-23 02:18:18,930 INFO L78 Accepts]: Start accepts. Automaton has 15024 states and 18586 transitions. Word has length 308 [2022-11-23 02:18:18,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:18:18,931 INFO L495 AbstractCegarLoop]: Abstraction has 15024 states and 18586 transitions. [2022-11-23 02:18:18,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 2 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:18:18,932 INFO L276 IsEmpty]: Start isEmpty. Operand 15024 states and 18586 transitions. [2022-11-23 02:18:18,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2022-11-23 02:18:18,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:18:18,942 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 02:18:18,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 02:18:18,942 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:18:18,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:18:18,943 INFO L85 PathProgramCache]: Analyzing trace with hash 819062460, now seen corresponding path program 1 times [2022-11-23 02:18:18,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:18:18,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190974157] [2022-11-23 02:18:18,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:18:18,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:18:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:18:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 409 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-23 02:18:20,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:18:20,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190974157] [2022-11-23 02:18:20,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190974157] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:18:20,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:18:20,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 02:18:20,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777887234] [2022-11-23 02:18:20,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:18:20,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:18:20,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:18:20,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:18:20,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:18:20,523 INFO L87 Difference]: Start difference. First operand 15024 states and 18586 transitions. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:18:24,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:18:24,885 INFO L93 Difference]: Finished difference Result 36054 states and 45715 transitions. [2022-11-23 02:18:24,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:18:24,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 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 387 [2022-11-23 02:18:24,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:18:24,921 INFO L225 Difference]: With dead ends: 36054 [2022-11-23 02:18:24,921 INFO L226 Difference]: Without dead ends: 21783 [2022-11-23 02:18:24,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:18:24,938 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 828 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2037 mSolverCounterSat, 1001 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 3038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1001 IncrementalHoareTripleChecker+Valid, 2037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-23 02:18:24,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [828 Valid, 147 Invalid, 3038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1001 Valid, 2037 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-23 02:18:24,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21783 states. [2022-11-23 02:18:25,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21783 to 21032. [2022-11-23 02:18:25,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21032 states, 21031 states have (on average 1.2568113736864628) internal successors, (26432), 21031 states have internal predecessors, (26432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:18:25,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21032 states to 21032 states and 26432 transitions. [2022-11-23 02:18:25,316 INFO L78 Accepts]: Start accepts. Automaton has 21032 states and 26432 transitions. Word has length 387 [2022-11-23 02:18:25,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:18:25,317 INFO L495 AbstractCegarLoop]: Abstraction has 21032 states and 26432 transitions. [2022-11-23 02:18:25,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:18:25,318 INFO L276 IsEmpty]: Start isEmpty. Operand 21032 states and 26432 transitions. [2022-11-23 02:18:25,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2022-11-23 02:18:25,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:18:25,328 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 02:18:25,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 02:18:25,328 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:18:25,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:18:25,329 INFO L85 PathProgramCache]: Analyzing trace with hash 579469187, now seen corresponding path program 1 times [2022-11-23 02:18:25,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:18:25,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56905667] [2022-11-23 02:18:25,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:18:25,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:18:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:18:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 426 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-23 02:18:25,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:18:25,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56905667] [2022-11-23 02:18:25,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56905667] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:18:25,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:18:25,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 02:18:25,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198756601] [2022-11-23 02:18:25,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:18:25,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:18:25,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:18:25,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:18:25,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:18:25,670 INFO L87 Difference]: Start difference. First operand 21032 states and 26432 transitions. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:18:30,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:18:30,287 INFO L93 Difference]: Finished difference Result 56331 states and 72186 transitions. [2022-11-23 02:18:30,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:18:30,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 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 403 [2022-11-23 02:18:30,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:18:30,349 INFO L225 Difference]: With dead ends: 56331 [2022-11-23 02:18:30,349 INFO L226 Difference]: Without dead ends: 36052 [2022-11-23 02:18:30,371 INFO L412 NwaCegarLoop]: 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 [2022-11-23 02:18:30,373 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 729 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2227 mSolverCounterSat, 712 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 2939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 712 IncrementalHoareTripleChecker+Valid, 2227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-23 02:18:30,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 380 Invalid, 2939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [712 Valid, 2227 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-23 02:18:30,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36052 states. [2022-11-23 02:18:30,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36052 to 36052. [2022-11-23 02:18:30,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36052 states, 36051 states have (on average 1.23211561399129) internal successors, (44419), 36051 states have internal predecessors, (44419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:18:30,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36052 states to 36052 states and 44419 transitions. [2022-11-23 02:18:30,889 INFO L78 Accepts]: Start accepts. Automaton has 36052 states and 44419 transitions. Word has length 403 [2022-11-23 02:18:30,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:18:30,890 INFO L495 AbstractCegarLoop]: Abstraction has 36052 states and 44419 transitions. [2022-11-23 02:18:30,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:18:30,891 INFO L276 IsEmpty]: Start isEmpty. Operand 36052 states and 44419 transitions. [2022-11-23 02:18:30,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2022-11-23 02:18:30,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:18:30,900 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-11-23 02:18:30,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 02:18:30,900 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:18:30,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:18:30,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1978731887, now seen corresponding path program 1 times [2022-11-23 02:18:30,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:18:30,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532939261] [2022-11-23 02:18:30,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:18:30,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:18:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:18:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 284 proven. 108 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-11-23 02:18:31,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:18:31,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532939261] [2022-11-23 02:18:31,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532939261] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:18:31,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203311164] [2022-11-23 02:18:31,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:18:31,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:18:31,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:18:31,731 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:18:31,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 02:18:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:18:31,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 02:18:31,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:18:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2022-11-23 02:18:32,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:18:32,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203311164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:18:32,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:18:32,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-23 02:18:32,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456511897] [2022-11-23 02:18:32,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:18:32,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:18:32,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:18:32,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:18:32,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:18:32,011 INFO L87 Difference]: Start difference. First operand 36052 states and 44419 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 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) [2022-11-23 02:18:36,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:18:36,284 INFO L93 Difference]: Finished difference Result 84869 states and 105909 transitions. [2022-11-23 02:18:36,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:18:36,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 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 420 [2022-11-23 02:18:36,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:18:36,371 INFO L225 Difference]: With dead ends: 84869 [2022-11-23 02:18:36,372 INFO L226 Difference]: Without dead ends: 49570 [2022-11-23 02:18:36,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:18:36,398 INFO L413 NwaCegarLoop]: 1109 mSDtfsCounter, 857 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2198 mSolverCounterSat, 568 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 2766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 568 IncrementalHoareTripleChecker+Valid, 2198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-23 02:18:36,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 1117 Invalid, 2766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [568 Valid, 2198 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-23 02:18:36,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49570 states. [2022-11-23 02:18:37,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49570 to 48819. [2022-11-23 02:18:37,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48819 states, 48818 states have (on average 1.212524068990946) internal successors, (59193), 48818 states have internal predecessors, (59193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:18:37,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48819 states to 48819 states and 59193 transitions. [2022-11-23 02:18:37,149 INFO L78 Accepts]: Start accepts. Automaton has 48819 states and 59193 transitions. Word has length 420 [2022-11-23 02:18:37,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:18:37,150 INFO L495 AbstractCegarLoop]: Abstraction has 48819 states and 59193 transitions. [2022-11-23 02:18:37,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 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) [2022-11-23 02:18:37,150 INFO L276 IsEmpty]: Start isEmpty. Operand 48819 states and 59193 transitions. [2022-11-23 02:18:37,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2022-11-23 02:18:37,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:18:37,170 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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] [2022-11-23 02:18:37,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 02:18:37,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:18:37,377 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:18:37,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:18:37,377 INFO L85 PathProgramCache]: Analyzing trace with hash 160706966, now seen corresponding path program 1 times [2022-11-23 02:18:37,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:18:37,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747368318] [2022-11-23 02:18:37,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:18:37,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:18:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:18:38,064 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 389 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-23 02:18:38,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:18:38,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747368318] [2022-11-23 02:18:38,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747368318] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:18:38,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:18:38,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 02:18:38,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342238727] [2022-11-23 02:18:38,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:18:38,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:18:38,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:18:38,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:18:38,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:18:38,067 INFO L87 Difference]: Start difference. First operand 48819 states and 59193 transitions. Second operand has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:18:42,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:18:42,399 INFO L93 Difference]: Finished difference Result 132933 states and 161914 transitions. [2022-11-23 02:18:42,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:18:42,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 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 559 [2022-11-23 02:18:42,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:18:42,501 INFO L225 Difference]: With dead ends: 132933 [2022-11-23 02:18:42,502 INFO L226 Difference]: Without dead ends: 79610 [2022-11-23 02:18:42,542 INFO L412 NwaCegarLoop]: 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 [2022-11-23 02:18:42,543 INFO L413 NwaCegarLoop]: 1354 mSDtfsCounter, 565 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 615 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 2876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 615 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-23 02:18:42,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 1362 Invalid, 2876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [615 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-23 02:18:42,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79610 states. [2022-11-23 02:18:43,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79610 to 67594. [2022-11-23 02:18:43,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67594 states, 67593 states have (on average 1.178672347728315) internal successors, (79670), 67593 states have internal predecessors, (79670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:18:43,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67594 states to 67594 states and 79670 transitions. [2022-11-23 02:18:43,815 INFO L78 Accepts]: Start accepts. Automaton has 67594 states and 79670 transitions. Word has length 559 [2022-11-23 02:18:43,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:18:43,818 INFO L495 AbstractCegarLoop]: Abstraction has 67594 states and 79670 transitions. [2022-11-23 02:18:43,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:18:43,819 INFO L276 IsEmpty]: Start isEmpty. Operand 67594 states and 79670 transitions. [2022-11-23 02:18:43,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 604 [2022-11-23 02:18:43,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:18:43,841 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:18:43,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 02:18:43,842 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:18:43,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:18:43,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1489998915, now seen corresponding path program 1 times [2022-11-23 02:18:43,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:18:43,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309405318] [2022-11-23 02:18:43,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:18:43,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:18:44,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:18:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 365 proven. 108 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-11-23 02:18:45,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:18:45,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309405318] [2022-11-23 02:18:45,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309405318] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:18:45,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031144060] [2022-11-23 02:18:45,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:18:45,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:18:45,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:18:45,448 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:18:45,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 02:18:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:18:45,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 02:18:45,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:18:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 541 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-23 02:18:45,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:18:45,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031144060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:18:45,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:18:45,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-23 02:18:45,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819304762] [2022-11-23 02:18:45,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:18:45,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:18:45,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:18:45,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:18:45,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:18:45,939 INFO L87 Difference]: Start difference. First operand 67594 states and 79670 transitions. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:18:49,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:18:49,980 INFO L93 Difference]: Finished difference Result 150957 states and 178507 transitions. [2022-11-23 02:18:49,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:18:49,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 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 603 [2022-11-23 02:18:49,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:18:50,072 INFO L225 Difference]: With dead ends: 150957 [2022-11-23 02:18:50,072 INFO L226 Difference]: Without dead ends: 84116 [2022-11-23 02:18:50,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 602 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:18:50,102 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 750 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2089 mSolverCounterSat, 682 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 2771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 682 IncrementalHoareTripleChecker+Valid, 2089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-23 02:18:50,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [750 Valid, 288 Invalid, 2771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [682 Valid, 2089 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-23 02:18:50,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84116 states. [2022-11-23 02:18:51,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84116 to 84116. [2022-11-23 02:18:51,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84116 states, 84115 states have (on average 1.1696249182666587) internal successors, (98383), 84115 states have internal predecessors, (98383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:18:51,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84116 states to 84116 states and 98383 transitions. [2022-11-23 02:18:51,393 INFO L78 Accepts]: Start accepts. Automaton has 84116 states and 98383 transitions. Word has length 603 [2022-11-23 02:18:51,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:18:51,394 INFO L495 AbstractCegarLoop]: Abstraction has 84116 states and 98383 transitions. [2022-11-23 02:18:51,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:18:51,395 INFO L276 IsEmpty]: Start isEmpty. Operand 84116 states and 98383 transitions. [2022-11-23 02:18:51,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2022-11-23 02:18:51,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:18:51,424 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 02:18:51,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 02:18:51,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 02:18:51,630 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:18:51,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:18:51,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1539697602, now seen corresponding path program 1 times [2022-11-23 02:18:51,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:18:51,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358322274] [2022-11-23 02:18:51,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:18:51,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:18:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:18:52,354 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 606 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-11-23 02:18:52,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:18:52,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358322274] [2022-11-23 02:18:52,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358322274] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:18:52,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:18:52,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 02:18:52,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370639374] [2022-11-23 02:18:52,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:18:52,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:18:52,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:18:52,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:18:52,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:18:52,357 INFO L87 Difference]: Start difference. First operand 84116 states and 98383 transitions. Second operand has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:18:56,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:18:56,930 INFO L93 Difference]: Finished difference Result 198270 states and 233625 transitions. [2022-11-23 02:18:56,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:18:56,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 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 641 [2022-11-23 02:18:56,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:18:57,061 INFO L225 Difference]: With dead ends: 198270 [2022-11-23 02:18:57,062 INFO L226 Difference]: Without dead ends: 114907 [2022-11-23 02:18:57,098 INFO L412 NwaCegarLoop]: 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 [2022-11-23 02:18:57,099 INFO L413 NwaCegarLoop]: 1260 mSDtfsCounter, 665 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2304 mSolverCounterSat, 504 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 2808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 504 IncrementalHoareTripleChecker+Valid, 2304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-23 02:18:57,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [665 Valid, 1268 Invalid, 2808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [504 Valid, 2304 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-23 02:18:57,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114907 states. [2022-11-23 02:18:58,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114907 to 105144. [2022-11-23 02:18:58,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105144 states, 105143 states have (on average 1.1544468010233682) internal successors, (121382), 105143 states have internal predecessors, (121382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:18:58,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105144 states to 105144 states and 121382 transitions. [2022-11-23 02:18:58,985 INFO L78 Accepts]: Start accepts. Automaton has 105144 states and 121382 transitions. Word has length 641 [2022-11-23 02:18:58,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:18:58,985 INFO L495 AbstractCegarLoop]: Abstraction has 105144 states and 121382 transitions. [2022-11-23 02:18:58,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:18:58,986 INFO L276 IsEmpty]: Start isEmpty. Operand 105144 states and 121382 transitions. [2022-11-23 02:18:59,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2022-11-23 02:18:59,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:18:59,011 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:18:59,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 02:18:59,011 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:18:59,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:18:59,012 INFO L85 PathProgramCache]: Analyzing trace with hash 425959426, now seen corresponding path program 1 times [2022-11-23 02:18:59,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:18:59,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483898029] [2022-11-23 02:18:59,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:18:59,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:18:59,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:18:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 598 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-23 02:18:59,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:18:59,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483898029] [2022-11-23 02:18:59,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483898029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:18:59,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:18:59,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 02:18:59,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620115432] [2022-11-23 02:18:59,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:18:59,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:18:59,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:18:59,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:18:59,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:18:59,725 INFO L87 Difference]: Start difference. First operand 105144 states and 121382 transitions. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:19:04,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:19:04,241 INFO L93 Difference]: Finished difference Result 209535 states and 242006 transitions. [2022-11-23 02:19:04,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:19:04,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 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 641 [2022-11-23 02:19:04,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:19:04,361 INFO L225 Difference]: With dead ends: 209535 [2022-11-23 02:19:04,362 INFO L226 Difference]: Without dead ends: 105144 [2022-11-23 02:19:04,396 INFO L412 NwaCegarLoop]: 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 [2022-11-23 02:19:04,397 INFO L413 NwaCegarLoop]: 1262 mSDtfsCounter, 669 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 2662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 2228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-23 02:19:04,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [669 Valid, 1270 Invalid, 2662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 2228 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-23 02:19:04,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105144 states. [2022-11-23 02:19:05,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105144 to 98385. [2022-11-23 02:19:06,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98385 states, 98384 states have (on average 1.1174174662546756) internal successors, (109936), 98384 states have internal predecessors, (109936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:19:06,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98385 states to 98385 states and 109936 transitions. [2022-11-23 02:19:06,221 INFO L78 Accepts]: Start accepts. Automaton has 98385 states and 109936 transitions. Word has length 641 [2022-11-23 02:19:06,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:19:06,222 INFO L495 AbstractCegarLoop]: Abstraction has 98385 states and 109936 transitions. [2022-11-23 02:19:06,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:19:06,222 INFO L276 IsEmpty]: Start isEmpty. Operand 98385 states and 109936 transitions. [2022-11-23 02:19:06,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 728 [2022-11-23 02:19:06,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:19:06,256 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 02:19:06,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 02:19:06,256 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:19:06,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:19:06,257 INFO L85 PathProgramCache]: Analyzing trace with hash 8527769, now seen corresponding path program 1 times [2022-11-23 02:19:06,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:19:06,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183727812] [2022-11-23 02:19:06,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:19:06,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:19:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:19:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 636 proven. 110 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-11-23 02:19:07,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:19:07,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183727812] [2022-11-23 02:19:07,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183727812] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:19:07,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926987269] [2022-11-23 02:19:07,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:19:07,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:19:07,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:19:07,878 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:19:07,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 02:19:08,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:19:08,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 02:19:08,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:19:08,393 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 814 trivial. 0 not checked. [2022-11-23 02:19:08,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:19:08,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926987269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:19:08,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:19:08,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-23 02:19:08,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143073582] [2022-11-23 02:19:08,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:19:08,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:19:08,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:19:08,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:19:08,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 02:19:08,396 INFO L87 Difference]: Start difference. First operand 98385 states and 109936 transitions. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:19:13,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:19:13,039 INFO L93 Difference]: Finished difference Result 240326 states and 270238 transitions. [2022-11-23 02:19:13,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:19:13,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 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 727 [2022-11-23 02:19:13,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:19:13,189 INFO L225 Difference]: With dead ends: 240326 [2022-11-23 02:19:13,189 INFO L226 Difference]: Without dead ends: 142694 [2022-11-23 02:19:13,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 726 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 02:19:13,228 INFO L413 NwaCegarLoop]: 1215 mSDtfsCounter, 810 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2097 mSolverCounterSat, 693 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 2790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 693 IncrementalHoareTripleChecker+Valid, 2097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-23 02:19:13,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [810 Valid, 1223 Invalid, 2790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [693 Valid, 2097 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-23 02:19:13,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142694 states. [2022-11-23 02:19:15,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142694 to 132931. [2022-11-23 02:19:15,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132931 states, 132930 states have (on average 1.0928308132099602) internal successors, (145270), 132930 states have internal predecessors, (145270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:19:15,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132931 states to 132931 states and 145270 transitions. [2022-11-23 02:19:15,575 INFO L78 Accepts]: Start accepts. Automaton has 132931 states and 145270 transitions. Word has length 727 [2022-11-23 02:19:15,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:19:15,576 INFO L495 AbstractCegarLoop]: Abstraction has 132931 states and 145270 transitions. [2022-11-23 02:19:15,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:19:15,577 INFO L276 IsEmpty]: Start isEmpty. Operand 132931 states and 145270 transitions. [2022-11-23 02:19:15,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 900 [2022-11-23 02:19:15,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:19:15,637 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:19:15,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 02:19:15,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 02:19:15,843 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:19:15,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:19:15,844 INFO L85 PathProgramCache]: Analyzing trace with hash -71828105, now seen corresponding path program 1 times [2022-11-23 02:19:15,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:19:15,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089264515] [2022-11-23 02:19:15,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:19:15,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:19:16,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:19:17,628 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 510 proven. 108 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-23 02:19:17,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:19:17,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089264515] [2022-11-23 02:19:17,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089264515] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:19:17,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019725302] [2022-11-23 02:19:17,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:19:17,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:19:17,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:19:17,635 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:19:17,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 02:19:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:19:17,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 1070 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 02:19:18,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:19:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 510 proven. 0 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2022-11-23 02:19:18,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:19:18,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019725302] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:19:18,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:19:18,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-23 02:19:18,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119493409] [2022-11-23 02:19:18,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:19:18,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:19:18,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:19:18,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:19:18,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:19:18,708 INFO L87 Difference]: Start difference. First operand 132931 states and 145270 transitions. Second operand has 3 states, 3 states have (on average 210.0) internal successors, (630), 2 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:19:23,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:19:23,272 INFO L93 Difference]: Finished difference Result 265109 states and 289782 transitions. [2022-11-23 02:19:23,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:19:23,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 210.0) internal successors, (630), 2 states have internal predecessors, (630), 0 states have call successors, (0), 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 899 [2022-11-23 02:19:23,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:19:23,419 INFO L225 Difference]: With dead ends: 265109 [2022-11-23 02:19:23,419 INFO L226 Difference]: Without dead ends: 132931 [2022-11-23 02:19:23,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 898 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:19:23,471 INFO L413 NwaCegarLoop]: 406 mSDtfsCounter, 606 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2216 mSolverCounterSat, 493 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 2709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 493 IncrementalHoareTripleChecker+Valid, 2216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-23 02:19:23,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 412 Invalid, 2709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [493 Valid, 2216 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-23 02:19:23,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132931 states. [2022-11-23 02:19:25,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132931 to 132180. [2022-11-23 02:19:25,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132180 states, 132179 states have (on average 1.0611292262764886) internal successors, (140259), 132179 states have internal predecessors, (140259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:19:25,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132180 states to 132180 states and 140259 transitions. [2022-11-23 02:19:25,889 INFO L78 Accepts]: Start accepts. Automaton has 132180 states and 140259 transitions. Word has length 899 [2022-11-23 02:19:25,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:19:25,890 INFO L495 AbstractCegarLoop]: Abstraction has 132180 states and 140259 transitions. [2022-11-23 02:19:25,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.0) internal successors, (630), 2 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:19:25,890 INFO L276 IsEmpty]: Start isEmpty. Operand 132180 states and 140259 transitions. [2022-11-23 02:19:25,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 993 [2022-11-23 02:19:25,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:19:25,976 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:19:25,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 02:19:26,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f5aace0-54b3-45bb-9033-48b17453b865/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 02:19:26,184 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:19:26,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:19:26,185 INFO L85 PathProgramCache]: Analyzing trace with hash 2047354645, now seen corresponding path program 1 times [2022-11-23 02:19:26,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:19:26,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608295325] [2022-11-23 02:19:26,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:19:26,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:19:26,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:19:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 1081 proven. 0 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2022-11-23 02:19:28,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:19:28,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608295325] [2022-11-23 02:19:28,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608295325] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:19:28,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:19:28,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 02:19:28,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731801791] [2022-11-23 02:19:28,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:19:28,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:19:28,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:19:28,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:19:28,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:19:28,055 INFO L87 Difference]: Start difference. First operand 132180 states and 140259 transitions. Second operand has 3 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:19:33,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:19:33,467 INFO L93 Difference]: Finished difference Result 295151 states and 312916 transitions. [2022-11-23 02:19:33,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:19:33,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 0 states have call successors, (0), 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 992 [2022-11-23 02:19:33,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:19:33,718 INFO L225 Difference]: With dead ends: 295151 [2022-11-23 02:19:33,718 INFO L226 Difference]: Without dead ends: 163724 [2022-11-23 02:19:33,786 INFO L412 NwaCegarLoop]: 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 [2022-11-23 02:19:33,786 INFO L413 NwaCegarLoop]: 1363 mSDtfsCounter, 618 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2346 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 1371 SdHoareTripleChecker+Invalid, 2603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 2346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-23 02:19:33,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 1371 Invalid, 2603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 2346 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-23 02:19:33,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163724 states. [2022-11-23 02:19:36,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163724 to 162220. [2022-11-23 02:19:36,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162220 states, 162219 states have (on average 1.055381921969683) internal successors, (171203), 162219 states have internal predecessors, (171203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:19:36,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162220 states to 162220 states and 171203 transitions. [2022-11-23 02:19:36,443 INFO L78 Accepts]: Start accepts. Automaton has 162220 states and 171203 transitions. Word has length 992 [2022-11-23 02:19:36,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:19:36,444 INFO L495 AbstractCegarLoop]: Abstraction has 162220 states and 171203 transitions. [2022-11-23 02:19:36,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:19:36,444 INFO L276 IsEmpty]: Start isEmpty. Operand 162220 states and 171203 transitions. [2022-11-23 02:19:36,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1018 [2022-11-23 02:19:36,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:19:36,497 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:19:36,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 02:19:36,498 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:19:36,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:19:36,499 INFO L85 PathProgramCache]: Analyzing trace with hash 262313319, now seen corresponding path program 1 times [2022-11-23 02:19:36,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:19:36,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921375700] [2022-11-23 02:19:36,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:19:36,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:19:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:19:38,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1397 backedges. 1087 proven. 0 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2022-11-23 02:19:38,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:19:38,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921375700] [2022-11-23 02:19:38,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921375700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:19:38,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:19:38,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 02:19:38,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397196526] [2022-11-23 02:19:38,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:19:38,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:19:38,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:19:38,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:19:38,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:19:38,231 INFO L87 Difference]: Start difference. First operand 162220 states and 171203 transitions. Second operand has 3 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:19:43,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:19:43,156 INFO L93 Difference]: Finished difference Result 347719 states and 366558 transitions. [2022-11-23 02:19:43,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:19:43,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 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 1017 [2022-11-23 02:19:43,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:19:43,353 INFO L225 Difference]: With dead ends: 347719 [2022-11-23 02:19:43,353 INFO L226 Difference]: Without dead ends: 186252 [2022-11-23 02:19:43,423 INFO L412 NwaCegarLoop]: 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 [2022-11-23 02:19:43,423 INFO L413 NwaCegarLoop]: 1277 mSDtfsCounter, 593 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2452 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 2679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 2452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-23 02:19:43,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [593 Valid, 1284 Invalid, 2679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 2452 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-23 02:19:43,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186252 states. [2022-11-23 02:19:45,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186252 to 183248. [2022-11-23 02:19:45,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183248 states, 183247 states have (on average 1.0490758375307645) internal successors, (192240), 183247 states have internal predecessors, (192240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)