./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label37.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label37.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8 --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 8bd98135d8ae582748799a59c9940e3e8b9dde2a3b5c340030fcdb71a0e998f7 --- 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-e04fb08 [2022-11-16 11:55:29,892 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:55:29,894 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:55:29,922 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:55:29,922 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:55:29,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:55:29,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:55:29,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:55:29,941 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:55:29,946 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:55:29,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:55:29,949 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:55:29,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:55:29,952 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:55:29,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:55:29,956 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:55:29,957 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:55:29,958 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:55:29,960 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:55:29,967 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:55:29,969 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:55:29,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:55:29,973 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:55:29,974 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:55:29,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:55:29,983 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:55:29,983 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:55:29,985 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:55:29,985 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:55:29,986 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:55:29,987 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:55:29,988 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:55:29,990 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:55:29,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:55:29,993 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:55:29,993 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:55:29,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:55:29,994 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:55:29,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:55:29,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:55:29,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:55:29,997 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:55:30,034 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:55:30,035 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:55:30,035 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:55:30,035 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:55:30,036 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:55:30,037 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:55:30,037 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:55:30,037 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:55:30,038 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:55:30,038 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:55:30,039 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:55:30,039 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:55:30,040 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:55:30,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:55:30,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:55:30,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:55:30,040 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:55:30,041 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:55:30,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:55:30,041 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:55:30,041 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:55:30,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:55:30,042 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:55:30,042 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:55:30,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:55:30,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:55:30,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:55:30,044 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:55:30,044 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:55:30,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:55:30,045 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:55:30,045 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:55:30,045 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:55:30,045 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8bd98135d8ae582748799a59c9940e3e8b9dde2a3b5c340030fcdb71a0e998f7 [2022-11-16 11:55:30,369 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:55:30,396 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:55:30,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:55:30,401 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:55:30,401 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:55:30,403 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/eca-rers2012/Problem17_label37.c [2022-11-16 11:55:30,472 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/data/a5ddbce59/8027d50288ba4482acb9a95a308afd6f/FLAGb35e6282e [2022-11-16 11:55:31,180 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:55:31,180 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/sv-benchmarks/c/eca-rers2012/Problem17_label37.c [2022-11-16 11:55:31,206 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/data/a5ddbce59/8027d50288ba4482acb9a95a308afd6f/FLAGb35e6282e [2022-11-16 11:55:31,315 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/data/a5ddbce59/8027d50288ba4482acb9a95a308afd6f [2022-11-16 11:55:31,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:55:31,320 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:55:31,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:55:31,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:55:31,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:55:31,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:55:31" (1/1) ... [2022-11-16 11:55:31,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d256784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:31, skipping insertion in model container [2022-11-16 11:55:31,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:55:31" (1/1) ... [2022-11-16 11:55:31,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:55:31,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:55:31,756 WARN L229 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_d9a57c48-4e03-41dd-9b9f-965039f7dd68/sv-benchmarks/c/eca-rers2012/Problem17_label37.c[2848,2861] [2022-11-16 11:55:32,484 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:55:32,492 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:55:32,511 WARN L229 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_d9a57c48-4e03-41dd-9b9f-965039f7dd68/sv-benchmarks/c/eca-rers2012/Problem17_label37.c[2848,2861] [2022-11-16 11:55:32,961 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:55:32,985 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:55:32,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:32 WrapperNode [2022-11-16 11:55:32,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:55:32,988 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:55:32,988 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:55:32,988 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:55:32,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:32" (1/1) ... [2022-11-16 11:55:33,075 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:32" (1/1) ... [2022-11-16 11:55:33,389 INFO L138 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2022-11-16 11:55:33,389 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:55:33,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:55:33,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:55:33,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:55:33,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:32" (1/1) ... [2022-11-16 11:55:33,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:32" (1/1) ... [2022-11-16 11:55:33,459 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:32" (1/1) ... [2022-11-16 11:55:33,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:32" (1/1) ... [2022-11-16 11:55:33,692 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:32" (1/1) ... [2022-11-16 11:55:33,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:32" (1/1) ... [2022-11-16 11:55:33,755 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:32" (1/1) ... [2022-11-16 11:55:33,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:32" (1/1) ... [2022-11-16 11:55:33,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:55:33,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:55:33,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:55:33,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:55:33,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:32" (1/1) ... [2022-11-16 11:55:33,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:55:33,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:55:33,923 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:55:33,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:55:33,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:55:33,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:55:33,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:55:33,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:55:34,090 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:55:34,093 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:55:38,795 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:55:38,823 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:55:38,825 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 11:55:38,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:55:38 BoogieIcfgContainer [2022-11-16 11:55:38,830 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:55:38,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:55:38,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:55:38,838 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:55:38,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:55:31" (1/3) ... [2022-11-16 11:55:38,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70cd01d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:55:38, skipping insertion in model container [2022-11-16 11:55:38,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:32" (2/3) ... [2022-11-16 11:55:38,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70cd01d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:55:38, skipping insertion in model container [2022-11-16 11:55:38,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:55:38" (3/3) ... [2022-11-16 11:55:38,842 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label37.c [2022-11-16 11:55:38,864 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:55:38,865 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:55:38,985 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:55:38,993 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;@574911b1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:55:38,994 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:55:39,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:39,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:55:39,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:55:39,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:55:39,018 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:55:39,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:39,029 INFO L85 PathProgramCache]: Analyzing trace with hash 567305786, now seen corresponding path program 1 times [2022-11-16 11:55:39,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:39,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634185587] [2022-11-16 11:55:39,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:39,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:39,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:55:39,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:55:39,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634185587] [2022-11-16 11:55:39,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634185587] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:55:39,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:55:39,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:55:39,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181250387] [2022-11-16 11:55:39,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:55:39,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:55:39,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:39,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:55:39,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:55:39,523 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:44,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:55:44,246 INFO L93 Difference]: Finished difference Result 1667 states and 3061 transitions. [2022-11-16 11:55:44,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:55:44,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:55:44,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:55:44,271 INFO L225 Difference]: With dead ends: 1667 [2022-11-16 11:55:44,278 INFO L226 Difference]: Without dead ends: 998 [2022-11-16 11:55:44,283 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 [2022-11-16 11:55:44,290 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 527 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:55:44,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 276 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-16 11:55:44,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-11-16 11:55:44,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 982. [2022-11-16 11:55:44,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 1.707441386340469) internal successors, (1675), 981 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:44,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1675 transitions. [2022-11-16 11:55:44,388 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1675 transitions. Word has length 18 [2022-11-16 11:55:44,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:55:44,389 INFO L495 AbstractCegarLoop]: Abstraction has 982 states and 1675 transitions. [2022-11-16 11:55:44,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:44,389 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1675 transitions. [2022-11-16 11:55:44,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-16 11:55:44,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:55:44,392 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 11:55:44,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:55:44,393 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:55:44,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:44,393 INFO L85 PathProgramCache]: Analyzing trace with hash 581142199, now seen corresponding path program 1 times [2022-11-16 11:55:44,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:44,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021089495] [2022-11-16 11:55:44,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:44,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:44,602 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:55:44,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:55:44,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021089495] [2022-11-16 11:55:44,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021089495] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:55:44,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:55:44,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:55:44,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144216575] [2022-11-16 11:55:44,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:55:44,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:55:44,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:44,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:55:44,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:55:44,606 INFO L87 Difference]: Start difference. First operand 982 states and 1675 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:48,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:55:48,021 INFO L93 Difference]: Finished difference Result 2841 states and 4881 transitions. [2022-11-16 11:55:48,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:55:48,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2022-11-16 11:55:48,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:55:48,037 INFO L225 Difference]: With dead ends: 2841 [2022-11-16 11:55:48,038 INFO L226 Difference]: Without dead ends: 1861 [2022-11-16 11:55:48,046 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 [2022-11-16 11:55:48,049 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 407 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:55:48,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 496 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-16 11:55:48,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2022-11-16 11:55:48,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1857. [2022-11-16 11:55:48,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 1.4547413793103448) internal successors, (2700), 1856 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:48,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2700 transitions. [2022-11-16 11:55:48,157 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2700 transitions. Word has length 83 [2022-11-16 11:55:48,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:55:48,160 INFO L495 AbstractCegarLoop]: Abstraction has 1857 states and 2700 transitions. [2022-11-16 11:55:48,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:48,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2700 transitions. [2022-11-16 11:55:48,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-16 11:55:48,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:55:48,178 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 11:55:48,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:55:48,180 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:55:48,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:48,188 INFO L85 PathProgramCache]: Analyzing trace with hash -252550036, now seen corresponding path program 1 times [2022-11-16 11:55:48,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:48,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074852191] [2022-11-16 11:55:48,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:48,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:55:48,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:55:48,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074852191] [2022-11-16 11:55:48,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074852191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:55:48,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:55:48,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:55:48,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959822719] [2022-11-16 11:55:48,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:55:48,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:55:48,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:48,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:55:48,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:55:48,903 INFO L87 Difference]: Start difference. First operand 1857 states and 2700 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:53,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:55:53,212 INFO L93 Difference]: Finished difference Result 4591 states and 6640 transitions. [2022-11-16 11:55:53,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:55:53,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2022-11-16 11:55:53,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:55:53,225 INFO L225 Difference]: With dead ends: 4591 [2022-11-16 11:55:53,225 INFO L226 Difference]: Without dead ends: 2736 [2022-11-16 11:55:53,229 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 [2022-11-16 11:55:53,230 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 352 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:55:53,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 537 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-16 11:55:53,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2022-11-16 11:55:53,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2716. [2022-11-16 11:55:53,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2715 states have (on average 1.390791896869245) internal successors, (3776), 2715 states have internal predecessors, (3776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:53,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 3776 transitions. [2022-11-16 11:55:53,307 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 3776 transitions. Word has length 123 [2022-11-16 11:55:53,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:55:53,308 INFO L495 AbstractCegarLoop]: Abstraction has 2716 states and 3776 transitions. [2022-11-16 11:55:53,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:53,308 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 3776 transitions. [2022-11-16 11:55:53,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-16 11:55:53,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:55:53,314 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 11:55:53,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:55:53,315 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:55:53,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:53,316 INFO L85 PathProgramCache]: Analyzing trace with hash -800106755, now seen corresponding path program 1 times [2022-11-16 11:55:53,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:53,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427862696] [2022-11-16 11:55:53,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:53,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:53,580 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:55:53,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:55:53,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427862696] [2022-11-16 11:55:53,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427862696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:55:53,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:55:53,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:55:53,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478454357] [2022-11-16 11:55:53,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:55:53,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:55:53,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:53,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:55:53,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:55:53,585 INFO L87 Difference]: Start difference. First operand 2716 states and 3776 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:56,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:55:56,631 INFO L93 Difference]: Finished difference Result 6709 states and 9429 transitions. [2022-11-16 11:55:56,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:55:56,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2022-11-16 11:55:56,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:55:56,645 INFO L225 Difference]: With dead ends: 6709 [2022-11-16 11:55:56,646 INFO L226 Difference]: Without dead ends: 3995 [2022-11-16 11:55:56,649 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 [2022-11-16 11:55:56,650 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 347 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:55:56,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-16 11:55:56,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3995 states. [2022-11-16 11:55:56,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3995 to 3142. [2022-11-16 11:55:56,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3142 states, 3141 states have (on average 1.274434893346068) internal successors, (4003), 3141 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:56,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 4003 transitions. [2022-11-16 11:55:56,724 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 4003 transitions. Word has length 129 [2022-11-16 11:55:56,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:55:56,725 INFO L495 AbstractCegarLoop]: Abstraction has 3142 states and 4003 transitions. [2022-11-16 11:55:56,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:56,726 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 4003 transitions. [2022-11-16 11:55:56,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-16 11:55:56,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:55:56,728 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:55:56,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:55:56,729 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:55:56,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:56,730 INFO L85 PathProgramCache]: Analyzing trace with hash -345110489, now seen corresponding path program 1 times [2022-11-16 11:55:56,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:56,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140317923] [2022-11-16 11:55:56,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:56,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:57,268 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:55:57,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:55:57,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140317923] [2022-11-16 11:55:57,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140317923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:55:57,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:55:57,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:55:57,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321766263] [2022-11-16 11:55:57,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:55:57,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:55:57,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:57,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:55:57,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:55:57,274 INFO L87 Difference]: Start difference. First operand 3142 states and 4003 transitions. Second operand has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 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) [2022-11-16 11:56:01,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:01,068 INFO L93 Difference]: Finished difference Result 8019 states and 10522 transitions. [2022-11-16 11:56:01,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:56:01,069 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 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 166 [2022-11-16 11:56:01,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:01,084 INFO L225 Difference]: With dead ends: 8019 [2022-11-16 11:56:01,084 INFO L226 Difference]: Without dead ends: 4879 [2022-11-16 11:56:01,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:56:01,089 INFO L413 NwaCegarLoop]: 756 mSDtfsCounter, 1096 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 1990 mSolverCounterSat, 813 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 813 IncrementalHoareTripleChecker+Valid, 1990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:01,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1096 Valid, 881 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [813 Valid, 1990 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-16 11:56:01,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2022-11-16 11:56:01,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 4852. [2022-11-16 11:56:01,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4852 states, 4851 states have (on average 1.2665429808286952) internal successors, (6144), 4851 states have internal predecessors, (6144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:01,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4852 states to 4852 states and 6144 transitions. [2022-11-16 11:56:01,189 INFO L78 Accepts]: Start accepts. Automaton has 4852 states and 6144 transitions. Word has length 166 [2022-11-16 11:56:01,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:01,189 INFO L495 AbstractCegarLoop]: Abstraction has 4852 states and 6144 transitions. [2022-11-16 11:56:01,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 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) [2022-11-16 11:56:01,190 INFO L276 IsEmpty]: Start isEmpty. Operand 4852 states and 6144 transitions. [2022-11-16 11:56:01,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-16 11:56:01,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:01,193 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:01,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:56:01,193 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:01,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:01,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1150942888, now seen corresponding path program 1 times [2022-11-16 11:56:01,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:01,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130049379] [2022-11-16 11:56:01,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:01,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:01,412 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-16 11:56:01,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:01,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130049379] [2022-11-16 11:56:01,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130049379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:56:01,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:56:01,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:56:01,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799488851] [2022-11-16 11:56:01,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:01,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:56:01,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:01,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:56:01,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:56:01,416 INFO L87 Difference]: Start difference. First operand 4852 states and 6144 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) 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) [2022-11-16 11:56:04,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:04,716 INFO L93 Difference]: Finished difference Result 12249 states and 15825 transitions. [2022-11-16 11:56:04,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:56:04,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) 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 172 [2022-11-16 11:56:04,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:04,750 INFO L225 Difference]: With dead ends: 12249 [2022-11-16 11:56:04,750 INFO L226 Difference]: Without dead ends: 7399 [2022-11-16 11:56:04,756 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 [2022-11-16 11:56:04,757 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 430 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:04,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 545 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-16 11:56:04,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7399 states. [2022-11-16 11:56:04,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7399 to 4826. [2022-11-16 11:56:04,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4825 states have (on average 1.2652849740932643) internal successors, (6105), 4825 states have internal predecessors, (6105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:04,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 6105 transitions. [2022-11-16 11:56:04,857 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 6105 transitions. Word has length 172 [2022-11-16 11:56:04,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:04,858 INFO L495 AbstractCegarLoop]: Abstraction has 4826 states and 6105 transitions. [2022-11-16 11:56:04,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) 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) [2022-11-16 11:56:04,858 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 6105 transitions. [2022-11-16 11:56:04,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-11-16 11:56:04,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:04,861 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:04,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:56:04,862 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:04,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:04,862 INFO L85 PathProgramCache]: Analyzing trace with hash 592869292, now seen corresponding path program 1 times [2022-11-16 11:56:04,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:04,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298545098] [2022-11-16 11:56:04,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:04,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:04,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:05,073 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-16 11:56:05,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:05,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298545098] [2022-11-16 11:56:05,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298545098] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:56:05,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:56:05,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:56:05,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131309782] [2022-11-16 11:56:05,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:05,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:56:05,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:05,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:56:05,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:56:05,077 INFO L87 Difference]: Start difference. First operand 4826 states and 6105 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:08,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:08,500 INFO L93 Difference]: Finished difference Result 13481 states and 17131 transitions. [2022-11-16 11:56:08,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:56:08,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 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 185 [2022-11-16 11:56:08,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:08,528 INFO L225 Difference]: With dead ends: 13481 [2022-11-16 11:56:08,528 INFO L226 Difference]: Without dead ends: 8657 [2022-11-16 11:56:08,534 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 [2022-11-16 11:56:08,535 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 466 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 1748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:08,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 483 Invalid, 1748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-16 11:56:08,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8657 states. [2022-11-16 11:56:08,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8657 to 7378. [2022-11-16 11:56:08,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7378 states, 7377 states have (on average 1.2479327639962043) internal successors, (9206), 7377 states have internal predecessors, (9206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:08,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7378 states to 7378 states and 9206 transitions. [2022-11-16 11:56:08,684 INFO L78 Accepts]: Start accepts. Automaton has 7378 states and 9206 transitions. Word has length 185 [2022-11-16 11:56:08,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:08,685 INFO L495 AbstractCegarLoop]: Abstraction has 7378 states and 9206 transitions. [2022-11-16 11:56:08,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:08,685 INFO L276 IsEmpty]: Start isEmpty. Operand 7378 states and 9206 transitions. [2022-11-16 11:56:08,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-11-16 11:56:08,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:08,690 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-16 11:56:08,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:56:08,690 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:08,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:08,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1562276696, now seen corresponding path program 1 times [2022-11-16 11:56:08,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:08,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845367335] [2022-11-16 11:56:08,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:08,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:09,147 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-16 11:56:09,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:09,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845367335] [2022-11-16 11:56:09,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845367335] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:56:09,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:56:09,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:56:09,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216865188] [2022-11-16 11:56:09,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:09,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:56:09,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:09,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:56:09,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:56:09,152 INFO L87 Difference]: Start difference. First operand 7378 states and 9206 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:12,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:12,672 INFO L93 Difference]: Finished difference Result 18607 states and 23435 transitions. [2022-11-16 11:56:12,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:56:12,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 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 234 [2022-11-16 11:56:12,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:12,695 INFO L225 Difference]: With dead ends: 18607 [2022-11-16 11:56:12,695 INFO L226 Difference]: Without dead ends: 10379 [2022-11-16 11:56:12,703 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 [2022-11-16 11:56:12,704 INFO L413 NwaCegarLoop]: 945 mSDtfsCounter, 482 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:12,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 1020 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1481 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-16 11:56:12,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10379 states. [2022-11-16 11:56:12,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10379 to 10371. [2022-11-16 11:56:12,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10371 states, 10370 states have (on average 1.2060752169720348) internal successors, (12507), 10370 states have internal predecessors, (12507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:12,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10371 states to 10371 states and 12507 transitions. [2022-11-16 11:56:12,860 INFO L78 Accepts]: Start accepts. Automaton has 10371 states and 12507 transitions. Word has length 234 [2022-11-16 11:56:12,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:12,860 INFO L495 AbstractCegarLoop]: Abstraction has 10371 states and 12507 transitions. [2022-11-16 11:56:12,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:12,861 INFO L276 IsEmpty]: Start isEmpty. Operand 10371 states and 12507 transitions. [2022-11-16 11:56:12,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-16 11:56:12,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:12,865 INFO L195 NwaCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:12,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 11:56:12,866 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:12,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:12,867 INFO L85 PathProgramCache]: Analyzing trace with hash -408685212, now seen corresponding path program 1 times [2022-11-16 11:56:12,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:12,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746775459] [2022-11-16 11:56:12,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:12,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:12,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:13,334 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 170 proven. 70 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 11:56:13,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:13,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746775459] [2022-11-16 11:56:13,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746775459] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:13,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379676776] [2022-11-16 11:56:13,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:13,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:13,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:13,343 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:13,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:56:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:13,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:56:13,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 170 proven. 70 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 11:56:14,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:56:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 240 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 11:56:14,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379676776] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:14,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:56:14,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2022-11-16 11:56:14,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13004259] [2022-11-16 11:56:14,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:14,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:56:14,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:14,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:56:14,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:56:14,477 INFO L87 Difference]: Start difference. First operand 10371 states and 12507 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 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) [2022-11-16 11:56:20,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:20,101 INFO L93 Difference]: Finished difference Result 32691 states and 39751 transitions. [2022-11-16 11:56:20,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:56:20,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 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 242 [2022-11-16 11:56:20,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:20,142 INFO L225 Difference]: With dead ends: 32691 [2022-11-16 11:56:20,142 INFO L226 Difference]: Without dead ends: 21461 [2022-11-16 11:56:20,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 479 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:56:20,153 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 904 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 2319 mSolverCounterSat, 853 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 3172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 853 IncrementalHoareTripleChecker+Valid, 2319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:20,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [904 Valid, 158 Invalid, 3172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [853 Valid, 2319 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-11-16 11:56:20,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21461 states. [2022-11-16 11:56:20,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21461 to 21459. [2022-11-16 11:56:20,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21459 states, 21458 states have (on average 1.1587752819461272) internal successors, (24865), 21458 states have internal predecessors, (24865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:20,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21459 states to 21459 states and 24865 transitions. [2022-11-16 11:56:20,473 INFO L78 Accepts]: Start accepts. Automaton has 21459 states and 24865 transitions. Word has length 242 [2022-11-16 11:56:20,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:20,474 INFO L495 AbstractCegarLoop]: Abstraction has 21459 states and 24865 transitions. [2022-11-16 11:56:20,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 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) [2022-11-16 11:56:20,475 INFO L276 IsEmpty]: Start isEmpty. Operand 21459 states and 24865 transitions. [2022-11-16 11:56:20,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-11-16 11:56:20,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:20,484 INFO L195 NwaCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:20,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:56:20,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-16 11:56:20,690 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:20,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:20,690 INFO L85 PathProgramCache]: Analyzing trace with hash 302196312, now seen corresponding path program 1 times [2022-11-16 11:56:20,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:20,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677585141] [2022-11-16 11:56:20,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:20,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:20,987 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 190 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-16 11:56:20,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:20,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677585141] [2022-11-16 11:56:20,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677585141] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:56:20,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:56:20,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:56:20,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518834698] [2022-11-16 11:56:20,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:20,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:56:20,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:20,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:56:20,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:56:20,990 INFO L87 Difference]: Start difference. First operand 21459 states and 24865 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:23,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:23,780 INFO L93 Difference]: Finished difference Result 47592 states and 55279 transitions. [2022-11-16 11:56:23,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:56:23,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 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 255 [2022-11-16 11:56:23,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:23,833 INFO L225 Difference]: With dead ends: 47592 [2022-11-16 11:56:23,834 INFO L226 Difference]: Without dead ends: 25708 [2022-11-16 11:56:23,852 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 [2022-11-16 11:56:23,853 INFO L413 NwaCegarLoop]: 793 mSDtfsCounter, 371 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:23,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 860 Invalid, 1408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-16 11:56:23,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25708 states. [2022-11-16 11:56:24,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25708 to 25708. [2022-11-16 11:56:24,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25708 states, 25707 states have (on average 1.1349048897187537) internal successors, (29175), 25707 states have internal predecessors, (29175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:24,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25708 states to 25708 states and 29175 transitions. [2022-11-16 11:56:24,407 INFO L78 Accepts]: Start accepts. Automaton has 25708 states and 29175 transitions. Word has length 255 [2022-11-16 11:56:24,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:24,408 INFO L495 AbstractCegarLoop]: Abstraction has 25708 states and 29175 transitions. [2022-11-16 11:56:24,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:24,408 INFO L276 IsEmpty]: Start isEmpty. Operand 25708 states and 29175 transitions. [2022-11-16 11:56:24,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-11-16 11:56:24,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:24,420 INFO L195 NwaCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:24,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 11:56:24,421 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:24,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:24,422 INFO L85 PathProgramCache]: Analyzing trace with hash 81778786, now seen corresponding path program 1 times [2022-11-16 11:56:24,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:24,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055804088] [2022-11-16 11:56:24,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:24,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:25,081 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 311 proven. 73 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-16 11:56:25,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:25,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055804088] [2022-11-16 11:56:25,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055804088] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:25,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015880652] [2022-11-16 11:56:25,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:25,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:25,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:25,088 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:25,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:56:25,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:25,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:56:25,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:25,820 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 311 proven. 73 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-16 11:56:25,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:56:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 384 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-16 11:56:26,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015880652] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:26,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:56:26,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2022-11-16 11:56:26,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603320564] [2022-11-16 11:56:26,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:26,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:56:26,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:26,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:56:26,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:56:26,226 INFO L87 Difference]: Start difference. First operand 25708 states and 29175 transitions. Second operand has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:31,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:31,086 INFO L93 Difference]: Finished difference Result 62499 states and 71199 transitions. [2022-11-16 11:56:31,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:56:31,087 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 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 316 [2022-11-16 11:56:31,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:31,142 INFO L225 Difference]: With dead ends: 62499 [2022-11-16 11:56:31,142 INFO L226 Difference]: Without dead ends: 36366 [2022-11-16 11:56:31,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 627 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:56:31,162 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 843 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 2345 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 2345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:31,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [843 Valid, 195 Invalid, 2839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 2345 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-16 11:56:31,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36366 states. [2022-11-16 11:56:31,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36366 to 34238. [2022-11-16 11:56:31,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34238 states, 34237 states have (on average 1.1454566696848438) internal successors, (39217), 34237 states have internal predecessors, (39217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:31,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34238 states to 34238 states and 39217 transitions. [2022-11-16 11:56:31,966 INFO L78 Accepts]: Start accepts. Automaton has 34238 states and 39217 transitions. Word has length 316 [2022-11-16 11:56:31,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:31,967 INFO L495 AbstractCegarLoop]: Abstraction has 34238 states and 39217 transitions. [2022-11-16 11:56:31,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:31,967 INFO L276 IsEmpty]: Start isEmpty. Operand 34238 states and 39217 transitions. [2022-11-16 11:56:31,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2022-11-16 11:56:31,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:31,992 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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] [2022-11-16 11:56:32,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:56:32,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:32,198 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:32,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:32,199 INFO L85 PathProgramCache]: Analyzing trace with hash 2138614133, now seen corresponding path program 1 times [2022-11-16 11:56:32,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:32,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349488398] [2022-11-16 11:56:32,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:32,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:32,947 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2022-11-16 11:56:32,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:32,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349488398] [2022-11-16 11:56:32,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349488398] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:56:32,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:56:32,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:56:32,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335077182] [2022-11-16 11:56:32,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:32,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:56:32,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:32,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:56:32,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:56:32,951 INFO L87 Difference]: Start difference. First operand 34238 states and 39217 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:36,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:36,183 INFO L93 Difference]: Finished difference Result 80388 states and 92354 transitions. [2022-11-16 11:56:36,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:56:36,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 439 [2022-11-16 11:56:36,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:36,246 INFO L225 Difference]: With dead ends: 80388 [2022-11-16 11:56:36,246 INFO L226 Difference]: Without dead ends: 45725 [2022-11-16 11:56:36,261 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 [2022-11-16 11:56:36,262 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 486 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 1530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:36,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 255 Invalid, 1530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 1287 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-16 11:56:36,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45725 states. [2022-11-16 11:56:36,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45725 to 33771. [2022-11-16 11:56:36,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33771 states, 33770 states have (on average 1.1432928634883033) internal successors, (38609), 33770 states have internal predecessors, (38609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:36,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33771 states to 33771 states and 38609 transitions. [2022-11-16 11:56:36,883 INFO L78 Accepts]: Start accepts. Automaton has 33771 states and 38609 transitions. Word has length 439 [2022-11-16 11:56:36,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:36,884 INFO L495 AbstractCegarLoop]: Abstraction has 33771 states and 38609 transitions. [2022-11-16 11:56:36,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:36,884 INFO L276 IsEmpty]: Start isEmpty. Operand 33771 states and 38609 transitions. [2022-11-16 11:56:36,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2022-11-16 11:56:36,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:36,895 INFO L195 NwaCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:36,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 11:56:36,895 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:36,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:36,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1984090076, now seen corresponding path program 1 times [2022-11-16 11:56:36,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:36,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025589500] [2022-11-16 11:56:36,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:36,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:37,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 298 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 11:56:37,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:37,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025589500] [2022-11-16 11:56:37,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025589500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:56:37,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:56:37,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:56:37,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718084249] [2022-11-16 11:56:37,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:37,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:56:37,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:37,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:56:37,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:56:37,567 INFO L87 Difference]: Start difference. First operand 33771 states and 38609 transitions. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:40,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:40,837 INFO L93 Difference]: Finished difference Result 80766 states and 92383 transitions. [2022-11-16 11:56:40,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:56:40,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 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 451 [2022-11-16 11:56:40,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:41,007 INFO L225 Difference]: With dead ends: 80766 [2022-11-16 11:56:41,011 INFO L226 Difference]: Without dead ends: 43595 [2022-11-16 11:56:41,038 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 [2022-11-16 11:56:41,048 INFO L413 NwaCegarLoop]: 777 mSDtfsCounter, 372 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:41,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 846 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 1230 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-16 11:56:41,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43595 states. [2022-11-16 11:56:41,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43595 to 38898. [2022-11-16 11:56:41,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38898 states, 38897 states have (on average 1.1182610484099031) internal successors, (43497), 38897 states have internal predecessors, (43497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:41,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38898 states to 38898 states and 43497 transitions. [2022-11-16 11:56:41,697 INFO L78 Accepts]: Start accepts. Automaton has 38898 states and 43497 transitions. Word has length 451 [2022-11-16 11:56:41,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:41,697 INFO L495 AbstractCegarLoop]: Abstraction has 38898 states and 43497 transitions. [2022-11-16 11:56:41,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:41,699 INFO L276 IsEmpty]: Start isEmpty. Operand 38898 states and 43497 transitions. [2022-11-16 11:56:41,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2022-11-16 11:56:41,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:41,710 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:41,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 11:56:41,711 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:41,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:41,712 INFO L85 PathProgramCache]: Analyzing trace with hash -115130207, now seen corresponding path program 1 times [2022-11-16 11:56:41,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:41,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209315368] [2022-11-16 11:56:41,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:41,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 300 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:43,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:43,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209315368] [2022-11-16 11:56:43,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209315368] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:43,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578287917] [2022-11-16 11:56:43,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:43,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:43,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:43,465 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:43,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:56:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:43,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:56:43,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 218 proven. 82 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 11:56:44,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:56:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 218 proven. 82 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 11:56:45,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578287917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:56:45,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:56:45,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2022-11-16 11:56:45,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691555070] [2022-11-16 11:56:45,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:56:45,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:56:45,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:45,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:56:45,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:56:45,894 INFO L87 Difference]: Start difference. First operand 38898 states and 43497 transitions. Second operand has 9 states, 9 states have (on average 119.88888888888889) internal successors, (1079), 9 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:05,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:05,014 INFO L93 Difference]: Finished difference Result 126790 states and 142783 transitions. [2022-11-16 11:57:05,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:57:05,014 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 119.88888888888889) internal successors, (1079), 9 states have internal predecessors, (1079), 0 states have call successors, (0), 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 453 [2022-11-16 11:57:05,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:05,094 INFO L225 Difference]: With dead ends: 126790 [2022-11-16 11:57:05,094 INFO L226 Difference]: Without dead ends: 85767 [2022-11-16 11:57:05,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 931 GetRequests, 913 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:57:05,117 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 7625 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 11487 mSolverCounterSat, 2826 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7625 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 14313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2826 IncrementalHoareTripleChecker+Valid, 11487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:05,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7625 Valid, 428 Invalid, 14313 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2826 Valid, 11487 Invalid, 0 Unknown, 0 Unchecked, 18.0s Time] [2022-11-16 11:57:05,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85767 states. [2022-11-16 11:57:06,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85767 to 76353. [2022-11-16 11:57:06,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76353 states, 76352 states have (on average 1.120088537300922) internal successors, (85521), 76352 states have internal predecessors, (85521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:06,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76353 states to 76353 states and 85521 transitions. [2022-11-16 11:57:06,461 INFO L78 Accepts]: Start accepts. Automaton has 76353 states and 85521 transitions. Word has length 453 [2022-11-16 11:57:06,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:06,462 INFO L495 AbstractCegarLoop]: Abstraction has 76353 states and 85521 transitions. [2022-11-16 11:57:06,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 119.88888888888889) internal successors, (1079), 9 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:06,462 INFO L276 IsEmpty]: Start isEmpty. Operand 76353 states and 85521 transitions. [2022-11-16 11:57:06,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2022-11-16 11:57:06,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:06,475 INFO L195 NwaCegarLoop]: trace histogram [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, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:06,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:06,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:06,681 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:06,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:06,682 INFO L85 PathProgramCache]: Analyzing trace with hash -25758450, now seen corresponding path program 1 times [2022-11-16 11:57:06,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:06,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153006707] [2022-11-16 11:57:06,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:06,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:07,640 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2022-11-16 11:57:07,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:07,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153006707] [2022-11-16 11:57:07,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153006707] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:07,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:07,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:57:07,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220887455] [2022-11-16 11:57:07,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:07,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:57:07,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:07,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:57:07,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:57:07,644 INFO L87 Difference]: Start difference. First operand 76353 states and 85521 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:10,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:10,611 INFO L93 Difference]: Finished difference Result 168447 states and 188435 transitions. [2022-11-16 11:57:10,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:57:10,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 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 462 [2022-11-16 11:57:10,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:10,696 INFO L225 Difference]: With dead ends: 168447 [2022-11-16 11:57:10,697 INFO L226 Difference]: Without dead ends: 88269 [2022-11-16 11:57:10,722 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 [2022-11-16 11:57:10,723 INFO L413 NwaCegarLoop]: 733 mSDtfsCounter, 447 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:10,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 792 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-16 11:57:10,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88269 states. [2022-11-16 11:57:11,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88269 to 76327. [2022-11-16 11:57:11,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76327 states, 76326 states have (on average 1.1068574273510992) internal successors, (84482), 76326 states have internal predecessors, (84482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:12,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76327 states to 76327 states and 84482 transitions. [2022-11-16 11:57:12,039 INFO L78 Accepts]: Start accepts. Automaton has 76327 states and 84482 transitions. Word has length 462 [2022-11-16 11:57:12,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:12,039 INFO L495 AbstractCegarLoop]: Abstraction has 76327 states and 84482 transitions. [2022-11-16 11:57:12,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:12,040 INFO L276 IsEmpty]: Start isEmpty. Operand 76327 states and 84482 transitions. [2022-11-16 11:57:12,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2022-11-16 11:57:12,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:12,046 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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] [2022-11-16 11:57:12,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 11:57:12,047 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:12,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:12,047 INFO L85 PathProgramCache]: Analyzing trace with hash 964590683, now seen corresponding path program 1 times [2022-11-16 11:57:12,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:12,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201620283] [2022-11-16 11:57:12,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:12,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:12,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:13,783 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 261 proven. 82 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 11:57:13,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:13,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201620283] [2022-11-16 11:57:13,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201620283] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:13,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394887599] [2022-11-16 11:57:13,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:13,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:13,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:13,786 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:13,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:57:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:14,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 11:57:14,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 358 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:21,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-16 11:57:24,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394887599] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:24,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:57:24,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 5] total 9 [2022-11-16 11:57:24,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801125687] [2022-11-16 11:57:24,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:24,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:57:24,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:24,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:57:24,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:57:24,847 INFO L87 Difference]: Start difference. First operand 76327 states and 84482 transitions. Second operand has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:28,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:28,631 INFO L93 Difference]: Finished difference Result 158956 states and 175626 transitions. [2022-11-16 11:57:28,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:57:28,635 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 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 496 [2022-11-16 11:57:28,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:28,723 INFO L225 Difference]: With dead ends: 158956 [2022-11-16 11:57:28,723 INFO L226 Difference]: Without dead ends: 83056 [2022-11-16 11:57:28,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 993 GetRequests, 986 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:57:28,741 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 477 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 1744 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 2097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 1744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:28,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 308 Invalid, 2097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 1744 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-16 11:57:28,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83056 states. [2022-11-16 11:57:29,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83056 to 81426. [2022-11-16 11:57:29,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81426 states, 81425 states have (on average 1.0953392692661958) internal successors, (89188), 81425 states have internal predecessors, (89188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:29,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81426 states to 81426 states and 89188 transitions. [2022-11-16 11:57:29,922 INFO L78 Accepts]: Start accepts. Automaton has 81426 states and 89188 transitions. Word has length 496 [2022-11-16 11:57:29,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:29,922 INFO L495 AbstractCegarLoop]: Abstraction has 81426 states and 89188 transitions. [2022-11-16 11:57:29,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:29,923 INFO L276 IsEmpty]: Start isEmpty. Operand 81426 states and 89188 transitions. [2022-11-16 11:57:29,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2022-11-16 11:57:29,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:29,940 INFO L195 NwaCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:29,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:30,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 11:57:30,142 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:30,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:30,142 INFO L85 PathProgramCache]: Analyzing trace with hash 159594589, now seen corresponding path program 1 times [2022-11-16 11:57:30,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:30,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285496134] [2022-11-16 11:57:30,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:30,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-11-16 11:57:31,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:31,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285496134] [2022-11-16 11:57:31,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285496134] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:31,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:31,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:57:31,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202101847] [2022-11-16 11:57:31,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:31,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:57:31,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:31,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:57:31,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:57:31,465 INFO L87 Difference]: Start difference. First operand 81426 states and 89188 transitions. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:33,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:33,765 INFO L93 Difference]: Finished difference Result 162420 states and 177942 transitions. [2022-11-16 11:57:33,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:57:33,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 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 585 [2022-11-16 11:57:33,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:33,839 INFO L225 Difference]: With dead ends: 162420 [2022-11-16 11:57:33,840 INFO L226 Difference]: Without dead ends: 81421 [2022-11-16 11:57:33,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:57:33,875 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 609 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:33,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 562 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-16 11:57:34,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81421 states. [2022-11-16 11:57:35,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81421 to 81420. [2022-11-16 11:57:35,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81420 states, 81419 states have (on average 1.0948181628366842) internal successors, (89139), 81419 states have internal predecessors, (89139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:35,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81420 states to 81420 states and 89139 transitions. [2022-11-16 11:57:35,387 INFO L78 Accepts]: Start accepts. Automaton has 81420 states and 89139 transitions. Word has length 585 [2022-11-16 11:57:35,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:35,387 INFO L495 AbstractCegarLoop]: Abstraction has 81420 states and 89139 transitions. [2022-11-16 11:57:35,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:35,388 INFO L276 IsEmpty]: Start isEmpty. Operand 81420 states and 89139 transitions. [2022-11-16 11:57:35,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2022-11-16 11:57:35,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:35,402 INFO L195 NwaCegarLoop]: trace histogram [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, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 11:57:35,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 11:57:35,402 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:35,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:35,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1715675557, now seen corresponding path program 1 times [2022-11-16 11:57:35,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:35,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829935832] [2022-11-16 11:57:35,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:35,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 357 proven. 0 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2022-11-16 11:57:35,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:35,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829935832] [2022-11-16 11:57:35,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829935832] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:35,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:35,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:57:35,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712481387] [2022-11-16 11:57:35,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:35,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:57:35,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:35,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:57:35,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:57:35,810 INFO L87 Difference]: Start difference. First operand 81420 states and 89139 transitions. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:38,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:38,984 INFO L93 Difference]: Finished difference Result 168792 states and 184597 transitions. [2022-11-16 11:57:38,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:57:38,987 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 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 604 [2022-11-16 11:57:38,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:39,058 INFO L225 Difference]: With dead ends: 168792 [2022-11-16 11:57:39,058 INFO L226 Difference]: Without dead ends: 85673 [2022-11-16 11:57:39,079 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 [2022-11-16 11:57:39,079 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 495 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:39,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 694 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 1155 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-16 11:57:39,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85673 states. [2022-11-16 11:57:40,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85673 to 83541. [2022-11-16 11:57:40,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83541 states, 83540 states have (on average 1.0804524778549198) internal successors, (90261), 83540 states have internal predecessors, (90261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:40,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83541 states to 83541 states and 90261 transitions. [2022-11-16 11:57:40,504 INFO L78 Accepts]: Start accepts. Automaton has 83541 states and 90261 transitions. Word has length 604 [2022-11-16 11:57:40,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:40,504 INFO L495 AbstractCegarLoop]: Abstraction has 83541 states and 90261 transitions. [2022-11-16 11:57:40,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:40,504 INFO L276 IsEmpty]: Start isEmpty. Operand 83541 states and 90261 transitions. [2022-11-16 11:57:40,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2022-11-16 11:57:40,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:40,521 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 11:57:40,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 11:57:40,521 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:40,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:40,521 INFO L85 PathProgramCache]: Analyzing trace with hash -839833757, now seen corresponding path program 1 times [2022-11-16 11:57:40,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:40,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904017360] [2022-11-16 11:57:40,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:40,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:40,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:42,128 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 360 proven. 82 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 11:57:42,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:42,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904017360] [2022-11-16 11:57:42,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904017360] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:42,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926645832] [2022-11-16 11:57:42,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:42,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:42,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:42,131 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:42,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:57:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:42,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:57:42,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:43,814 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 360 proven. 82 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 11:57:43,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:47,975 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 360 proven. 82 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 11:57:47,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926645832] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:47,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:57:47,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-11-16 11:57:47,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624105760] [2022-11-16 11:57:47,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:47,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:57:47,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:47,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:57:47,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:57:47,981 INFO L87 Difference]: Start difference. First operand 83541 states and 90261 transitions. Second operand has 8 states, 8 states have (on average 180.125) internal successors, (1441), 7 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:57,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:57,094 INFO L93 Difference]: Finished difference Result 184531 states and 199197 transitions. [2022-11-16 11:57:57,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:57:57,095 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 180.125) internal successors, (1441), 7 states have internal predecessors, (1441), 0 states have call successors, (0), 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 662 [2022-11-16 11:57:57,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:57,187 INFO L225 Difference]: With dead ends: 184531 [2022-11-16 11:57:57,187 INFO L226 Difference]: Without dead ends: 101417 [2022-11-16 11:57:57,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1326 GetRequests, 1319 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:57:57,205 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 2098 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 5149 mSolverCounterSat, 1155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2098 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 6304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1155 IncrementalHoareTripleChecker+Valid, 5149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:57,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2098 Valid, 288 Invalid, 6304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1155 Valid, 5149 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-11-16 11:57:57,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101417 states. [2022-11-16 11:57:58,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101417 to 89487. [2022-11-16 11:57:58,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89487 states, 89486 states have (on average 1.0776210803924635) internal successors, (96432), 89486 states have internal predecessors, (96432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:58,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89487 states to 89487 states and 96432 transitions. [2022-11-16 11:57:58,430 INFO L78 Accepts]: Start accepts. Automaton has 89487 states and 96432 transitions. Word has length 662 [2022-11-16 11:57:58,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:58,430 INFO L495 AbstractCegarLoop]: Abstraction has 89487 states and 96432 transitions. [2022-11-16 11:57:58,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 180.125) internal successors, (1441), 7 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:58,430 INFO L276 IsEmpty]: Start isEmpty. Operand 89487 states and 96432 transitions. [2022-11-16 11:57:58,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 672 [2022-11-16 11:57:58,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:58,445 INFO L195 NwaCegarLoop]: trace histogram [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, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 11:57:58,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:58,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:58,646 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:58,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:58,647 INFO L85 PathProgramCache]: Analyzing trace with hash 964339266, now seen corresponding path program 1 times [2022-11-16 11:57:58,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:58,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133280640] [2022-11-16 11:57:58,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:58,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:59,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:59,555 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 468 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-11-16 11:57:59,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:59,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133280640] [2022-11-16 11:57:59,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133280640] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:59,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:59,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:57:59,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154878136] [2022-11-16 11:57:59,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:59,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:57:59,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:59,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:57:59,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:57:59,558 INFO L87 Difference]: Start difference. First operand 89487 states and 96432 transitions. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:02,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:02,295 INFO L93 Difference]: Finished difference Result 185780 states and 200044 transitions. [2022-11-16 11:58:02,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:58:02,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 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 671 [2022-11-16 11:58:02,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:02,390 INFO L225 Difference]: With dead ends: 185780 [2022-11-16 11:58:02,390 INFO L226 Difference]: Without dead ends: 96720 [2022-11-16 11:58:02,430 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 [2022-11-16 11:58:02,431 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 223 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:02,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 343 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-16 11:58:02,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96720 states. [2022-11-16 11:58:03,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96720 to 93737. [2022-11-16 11:58:03,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93737 states, 93736 states have (on average 1.073813689510967) internal successors, (100655), 93736 states have internal predecessors, (100655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:04,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93737 states to 93737 states and 100655 transitions. [2022-11-16 11:58:04,052 INFO L78 Accepts]: Start accepts. Automaton has 93737 states and 100655 transitions. Word has length 671 [2022-11-16 11:58:04,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:04,053 INFO L495 AbstractCegarLoop]: Abstraction has 93737 states and 100655 transitions. [2022-11-16 11:58:04,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:04,053 INFO L276 IsEmpty]: Start isEmpty. Operand 93737 states and 100655 transitions. [2022-11-16 11:58:04,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 680 [2022-11-16 11:58:04,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:04,084 INFO L195 NwaCegarLoop]: trace histogram [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, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 11:58:04,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-16 11:58:04,085 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:58:04,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:04,085 INFO L85 PathProgramCache]: Analyzing trace with hash 379762830, now seen corresponding path program 1 times [2022-11-16 11:58:04,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:58:04,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070290376] [2022-11-16 11:58:04,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:04,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:58:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:05,034 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 468 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-11-16 11:58:05,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:58:05,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070290376] [2022-11-16 11:58:05,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070290376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:58:05,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:58:05,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:58:05,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861461200] [2022-11-16 11:58:05,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:58:05,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:58:05,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:58:05,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:58:05,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:58:05,037 INFO L87 Difference]: Start difference. First operand 93737 states and 100655 transitions. Second operand has 4 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:09,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:09,730 INFO L93 Difference]: Finished difference Result 207503 states and 222539 transitions. [2022-11-16 11:58:09,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:58:09,731 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 0 states have call successors, (0), 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 679 [2022-11-16 11:58:09,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:09,855 INFO L225 Difference]: With dead ends: 207503 [2022-11-16 11:58:09,855 INFO L226 Difference]: Without dead ends: 110789 [2022-11-16 11:58:09,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:58:09,898 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 686 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 2406 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 2735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 2406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:09,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 247 Invalid, 2735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 2406 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-16 11:58:09,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110789 states. [2022-11-16 11:58:11,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110789 to 103951. [2022-11-16 11:58:11,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103951 states, 103950 states have (on average 1.074170274170274) internal successors, (111660), 103950 states have internal predecessors, (111660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:11,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103951 states to 103951 states and 111660 transitions. [2022-11-16 11:58:11,551 INFO L78 Accepts]: Start accepts. Automaton has 103951 states and 111660 transitions. Word has length 679 [2022-11-16 11:58:11,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:11,551 INFO L495 AbstractCegarLoop]: Abstraction has 103951 states and 111660 transitions. [2022-11-16 11:58:11,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:11,552 INFO L276 IsEmpty]: Start isEmpty. Operand 103951 states and 111660 transitions. [2022-11-16 11:58:11,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 682 [2022-11-16 11:58:11,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:11,574 INFO L195 NwaCegarLoop]: trace histogram [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, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 11:58:11,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-16 11:58:11,575 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:58:11,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:11,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1546932795, now seen corresponding path program 1 times [2022-11-16 11:58:11,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:58:11,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630036939] [2022-11-16 11:58:11,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:11,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:58:11,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:12,570 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 474 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-11-16 11:58:12,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:58:12,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630036939] [2022-11-16 11:58:12,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630036939] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:58:12,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:58:12,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:58:12,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007914331] [2022-11-16 11:58:12,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:58:12,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:58:12,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:58:12,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:58:12,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:58:12,573 INFO L87 Difference]: Start difference. First operand 103951 states and 111660 transitions. Second operand has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:15,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:15,726 INFO L93 Difference]: Finished difference Result 215130 states and 230957 transitions. [2022-11-16 11:58:15,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:58:15,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 681 [2022-11-16 11:58:15,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:15,834 INFO L225 Difference]: With dead ends: 215130 [2022-11-16 11:58:15,835 INFO L226 Difference]: Without dead ends: 111181 [2022-11-16 11:58:15,875 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 [2022-11-16 11:58:15,876 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 194 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:15,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 384 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-16 11:58:15,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111181 states. [2022-11-16 11:58:17,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111181 to 100117. [2022-11-16 11:58:17,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100117 states, 100116 states have (on average 1.0743137959966438) internal successors, (107556), 100116 states have internal predecessors, (107556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:17,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100117 states to 100117 states and 107556 transitions. [2022-11-16 11:58:17,554 INFO L78 Accepts]: Start accepts. Automaton has 100117 states and 107556 transitions. Word has length 681 [2022-11-16 11:58:17,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:17,554 INFO L495 AbstractCegarLoop]: Abstraction has 100117 states and 107556 transitions. [2022-11-16 11:58:17,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:17,555 INFO L276 IsEmpty]: Start isEmpty. Operand 100117 states and 107556 transitions. [2022-11-16 11:58:17,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 685 [2022-11-16 11:58:17,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:17,575 INFO L195 NwaCegarLoop]: trace histogram [6, 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, 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, 2, 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] [2022-11-16 11:58:17,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-16 11:58:17,576 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:58:17,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:17,576 INFO L85 PathProgramCache]: Analyzing trace with hash 538910173, now seen corresponding path program 1 times [2022-11-16 11:58:17,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:58:17,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482574755] [2022-11-16 11:58:17,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:17,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:58:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:19,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1011 backedges. 750 proven. 80 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-11-16 11:58:19,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:58:19,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482574755] [2022-11-16 11:58:19,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482574755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:58:19,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381249380] [2022-11-16 11:58:19,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:19,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:19,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:58:19,228 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:58:19,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9a57c48-4e03-41dd-9b9f-965039f7dd68/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:58:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:19,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:58:19,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1011 backedges. 830 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-11-16 11:58:20,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:58:20,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381249380] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:58:20,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:58:20,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-16 11:58:20,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654487928] [2022-11-16 11:58:20,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:58:20,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:58:20,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:58:20,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:58:20,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:58:20,140 INFO L87 Difference]: Start difference. First operand 100117 states and 107556 transitions. Second operand has 4 states, 4 states have (on average 130.25) internal successors, (521), 4 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)